refactor(lodash): use lodash directly (#8368)

Michael Kaufman · Sushant
Commit 3fedaa43 authored Sep 25, 2017 by Michael Kaufman Committed by Sushant Sep 25, 2017
Showing with 271 additions and 236 deletions
lib/associations/belongs-to-many.js
lib/associations/helpers.js
lib/dialects/abstract/query-generator.js
lib/dialects/abstract/query.js
lib/dialects/mssql/query-generator.js
lib/dialects/mssql/query.js
lib/dialects/mysql/connection-manager.js
lib/dialects/mysql/query-generator.js
lib/dialects/mysql/query.js
lib/dialects/postgres/connection-manager.js
lib/dialects/postgres/query-generator.js
lib/dialects/postgres/query.js
lib/dialects/sqlite/query-generator.js
lib/dialects/sqlite/query-interface.js
lib/hooks.js
lib/instance-validator.js
lib/model.js
lib/query-interface.js
lib/sequelize.js
lib/transaction.js
--- a/lib/associations/belongs-to-many.js
+++ b/lib/associations/belongs-to-many.js
@@ -82,7 +82,7 @@ class BelongsToMany extends Association {
    if (this.as) {
      this.isAliased = true;
-      if (Utils._.isPlainObject(this.as)) {
+      if (_.isPlainObject(this.as)) {
        this.options.name = this.as;
        this.as = this.as.plural;
      } else {

--- a/lib/associations/helpers.js
+++ b/lib/associations/helpers.js
 'use strict';
-const Utils = require('./../utils');
+const _ = require('lodash');
 function checkNamingCollision(association) {
  if (association.source.rawAttributes.hasOwnProperty(association.as)) {
@@ -20,7 +20,7 @@ function addForeignKeyConstraints(newAttribute, source, target, options, key) {
  if (options.foreignKeyConstraint || options.onDelete || options.onUpdate) {
    // Find primary keys: composite keys not supported with this approach
-    const primaryKeys = Utils._.chain(source.rawAttributes).keys()
+    const primaryKeys = _.chain(source.rawAttributes).keys()
      .filter(key => source.rawAttributes[key].primaryKey)
      .map(key => source.rawAttributes[key].field || key).value();

--- a/lib/dialects/abstract/query-generator.js
+++ b/lib/dialects/abstract/query-generator.js
@@ -15,6 +15,7 @@ const uuid = require('uuid');
 const semver = require('semver');
 const QueryGenerator = {
+  _templateSettings: require('lodash').runInContext().templateSettings,
  options: {},
  extractTableDetails(tableName, options) {
@@ -132,7 +133,7 @@ const QueryGenerator = {
            columns: tmpColumns
          };
-          tmpTable = _.template(tmpTable)(replacement).trim();
+          tmpTable = _.template(tmpTable, this._templateSettings)(replacement).trim();
          outputFragment = ' OUTPUT ' + outputColumns + ' into @tmp';
          const selectFromTmp = ';select * from @tmp';
@@ -207,7 +208,7 @@ const QueryGenerator = {
      ].join(' ');
    }
-    return _.template(query)(replacements);
+    return _.template(query, this._templateSettings)(replacements);
  },
  /*
@@ -263,7 +264,7 @@ const QueryGenerator = {
      returning: this._dialect.supports.returnValues && options.returning ? ' RETURNING *' : ''
    };
-    return _.template(query)(replacements);
+    return _.template(query, this._templateSettings)(replacements);
  },
  /*
@@ -324,7 +325,7 @@ const QueryGenerator = {
            columns : tmpColumns
          };
-          tmpTable = _.template(tmpTable)(replacement).trim();
+          tmpTable = _.template(tmpTable, this._templateSettings)(replacement).trim();
          outputFragment = ' OUTPUT ' + outputColumns + ' into @tmp';
          selectFromTmp = ';select * from @tmp';
@@ -370,7 +371,7 @@ const QueryGenerator = {
      return '';
    }
-    return _.template(query)(replacements).trim();
+    return _.template(query, this._templateSettings)(replacements).trim();
  },
  /*
@@ -419,7 +420,7 @@ const QueryGenerator = {
      where: this.whereQuery(where)
    };
-    return _.template(query)(replacements);
+    return _.template(query, this._templateSettings)(replacements);
  },
  nameIndexes(indexes, rawTablename) {

--- a/lib/dialects/abstract/query.js
+++ b/lib/dialects/abstract/query.js
 'use strict';
+const _ = require('lodash');
 const Utils = require('../../utils');
 const SqlString = require('../../sql-string');
 const Dot = require('dottie');
@@ -213,7 +214,7 @@ class AbstractQuery {
  }
  handleShowTablesQuery(results) {
-    return Utils._.flatten(results.map(resultSet => Utils._.values(resultSet)));
+    return _.flatten(results.map(resultSet => _.values(resultSet)));
  }
  isShowIndexesQuery() {
@@ -253,7 +254,7 @@ class AbstractQuery {
    // Map raw fields to names if a mapping is provided
    if (this.options.fieldMap) {
      const fieldMap = this.options.fieldMap;
-      results = Utils._.map(results, result => Utils._.reduce(fieldMap, (result, name, field) => {
+      results = _.map(results, result => _.reduce(fieldMap, (result, name, field) => {
        if (result[field] !== undefined) {
          result[name] = result[field];
          delete result[field];
@@ -470,10 +471,10 @@ class AbstractQuery {
      return lastKeyPrefixMemo[key];
    };
    const getUniqueKeyAttributes = model => {
-      let uniqueKeyAttributes = Utils._.chain(model.uniqueKeys);
+      let uniqueKeyAttributes = _.chain(model.uniqueKeys);
      uniqueKeyAttributes = uniqueKeyAttributes
        .result(uniqueKeyAttributes.findKey() + '.fields')
-        .map(field => Utils._.findKey(model.attributes, chr => chr.field === field))
+        .map(field => _.findKey(model.attributes, chr => chr.field === field))
        .value();
      return uniqueKeyAttributes;
@@ -505,7 +506,7 @@ class AbstractQuery {
            topHash += row[includeOptions.model.primaryKeyAttributes[$i]];
          }
        }
-        else if (!Utils._.isEmpty(includeOptions.model.uniqueKeys)) {
+        else if (!_.isEmpty(includeOptions.model.uniqueKeys)) {
          uniqueKeyAttributes = getUniqueKeyAttributes(includeOptions.model);
          for ($i = 0; $i < uniqueKeyAttributes.length; $i++) {
            topHash += row[uniqueKeyAttributes[$i]];
@@ -557,7 +558,7 @@ class AbstractQuery {
                    itemHash += row[prefix+'.'+primaryKeyAttributes[$i]];
                  }
                }
-                else if (!Utils._.isEmpty(includeMap[prefix].model.uniqueKeys)) {
+                else if (!_.isEmpty(includeMap[prefix].model.uniqueKeys)) {
                  uniqueKeyAttributes = getUniqueKeyAttributes(includeMap[prefix].model);
                  for ($i = 0; $i < uniqueKeyAttributes.length; $i++) {
                    itemHash += row[prefix+'.'+uniqueKeyAttributes[$i]];
@@ -646,7 +647,7 @@ class AbstractQuery {
                itemHash += row[prefix+'.'+primaryKeyAttributes[$i]];
              }
            }
-            else if (!Utils._.isEmpty(includeMap[prefix].model.uniqueKeys)) {
+            else if (!_.isEmpty(includeMap[prefix].model.uniqueKeys)) {
              uniqueKeyAttributes = getUniqueKeyAttributes(includeMap[prefix].model);
              for ($i = 0; $i < uniqueKeyAttributes.length; $i++) {
                itemHash += row[prefix+'.'+uniqueKeyAttributes[$i]];

--- a/lib/dialects/mssql/query-generator.js
+++ b/lib/dialects/mssql/query-generator.js
 'use strict';
-const Utils = require('../../utils'),
+const _ = require('lodash');
-  DataTypes = require('../../data-types'),
+const Utils = require('../../utils');
-  AbstractQueryGenerator = require('../abstract/query-generator'),
+const DataTypes = require('../../data-types');
-  randomBytes = require('crypto').randomBytes,
+const AbstractQueryGenerator = require('../abstract/query-generator');
-  semver = require('semver');
+const randomBytes = require('crypto').randomBytes;
+const semver = require('semver');
 /* istanbul ignore next */
 const throwMethodUndefined = function(methodName) {
@@ -59,10 +60,10 @@ const QueryGenerator = {
        const dataType = attributes[attr];
        let match;
-        if (Utils._.includes(dataType, 'PRIMARY KEY')) {
+        if (_.includes(dataType, 'PRIMARY KEY')) {
          primaryKeys.push(attr);
-          if (Utils._.includes(dataType, 'REFERENCES')) {
+          if (_.includes(dataType, 'REFERENCES')) {
            // MSSQL doesn't support inline REFERENCES declarations: move to the end
            match = dataType.match(/^(.+) (REFERENCES.*)$/);
            attrStr.push(this.quoteIdentifier(attr) + ' ' + match[1].replace(/PRIMARY KEY/, ''));
@@ -70,7 +71,7 @@ const QueryGenerator = {
          } else {
            attrStr.push(this.quoteIdentifier(attr) + ' ' + dataType.replace(/PRIMARY KEY/, ''));
          }
-        } else if (Utils._.includes(dataType, 'REFERENCES')) {
+        } else if (_.includes(dataType, 'REFERENCES')) {
          // MSSQL doesn't support inline REFERENCES declarations: move to the end
          match = dataType.match(/^(.+) (REFERENCES.*)$/);
          attrStr.push(this.quoteIdentifier(attr) + ' ' + match[1]);
@@ -88,11 +89,11 @@ const QueryGenerator = {
      pkString = primaryKeys.map(pk => { return this.quoteIdentifier(pk); }).join(', ');
    if (options.uniqueKeys) {
-      Utils._.each(options.uniqueKeys, (columns, indexName) => {
+      _.each(options.uniqueKeys, (columns, indexName) => {
-        if (!Utils._.isString(indexName)) {
+        if (!_.isString(indexName)) {
          indexName = 'uniq_' + tableName + '_' + columns.fields.join('_');
        }
-        values.attributes += ', CONSTRAINT ' + self.quoteIdentifier(indexName) + ' UNIQUE (' + Utils._.map(columns.fields, self.quoteIdentifier).join(', ') + ')';
+        values.attributes += ', CONSTRAINT ' + self.quoteIdentifier(indexName) + ' UNIQUE (' + _.map(columns.fields, self.quoteIdentifier).join(', ') + ')';
      });
    }
@@ -106,7 +107,7 @@ const QueryGenerator = {
      }
    }
-    return Utils._.template(query)(values).trim() + ';';
+    return _.template(query, this._templateSettings)(values).trim() + ';';
  },
  describeTableQuery(tableName, schema) {
@@ -144,7 +145,7 @@ const QueryGenerator = {
  renameTableQuery(before, after) {
    const query = 'EXEC sp_rename <%= before %>, <%= after %>;';
-    return Utils._.template(query)({
+    return _.template(query, this._templateSettings)({
      before: this.quoteTable(before),
      after: this.quoteTable(after)
    });
@@ -160,7 +161,7 @@ const QueryGenerator = {
      table: this.quoteTable(tableName)
    };
-    return Utils._.template(query)(values).trim() + ';';
+    return _.template(query, this._templateSettings)(values).trim() + ';';
  },
  addColumnQuery(table, key, dataType) {
@@ -169,14 +170,14 @@ const QueryGenerator = {
    dataType.field = key;
    const query = 'ALTER TABLE <%= table %> ADD <%= attribute %>;',
-      attribute = Utils._.template('<%= key %> <%= definition %>')({
+      attribute = _.template('<%= key %> <%= definition %>', this._templateSettings)({
        key: this.quoteIdentifier(key),
        definition: this.attributeToSQL(dataType, {
          context: 'addColumn'
        })
      });
-    return Utils._.template(query)({
+    return _.template(query, this._templateSettings)({
      table: this.quoteTable(table),
      attribute
    });
@@ -184,7 +185,7 @@ const QueryGenerator = {
  removeColumnQuery(tableName, attributeName) {
    const query = 'ALTER TABLE <%= tableName %> DROP COLUMN <%= attributeName %>;';
-    return Utils._.template(query)({
+    return _.template(query, this._templateSettings)({
      tableName: this.quoteTable(tableName),
      attributeName: this.quoteIdentifier(attributeName)
    });
@@ -198,13 +199,13 @@ const QueryGenerator = {
    for (const attributeName in attributes) {
      const definition = attributes[attributeName];
      if (definition.match(/REFERENCES/)) {
-        constraintString.push(Utils._.template('<%= fkName %> FOREIGN KEY (<%= attrName %>) <%= definition %>')({
+        constraintString.push(_.template('<%= fkName %> FOREIGN KEY (<%= attrName %>) <%= definition %>', this._templateSettings)({
          fkName: this.quoteIdentifier(attributeName + '_foreign_idx'),
          attrName: this.quoteIdentifier(attributeName),
          definition: definition.replace(/.+?(?=REFERENCES)/, '')
        }));
      } else {
-        attrString.push(Utils._.template('<%= attrName %> <%= definition %>')({
+        attrString.push(_.template('<%= attrName %> <%= definition %>', this._templateSettings)({
          attrName: this.quoteIdentifier(attributeName),
          definition
        }));
@@ -220,7 +221,7 @@ const QueryGenerator = {
      finalQuery += 'ADD CONSTRAINT ' + constraintString.join(', ');
    }
-    return Utils._.template(query)({
+    return _.template(query, this._templateSettings)({
      tableName: this.quoteTable(tableName),
      query: finalQuery
    });
@@ -230,7 +231,7 @@ const QueryGenerator = {
    const query = "EXEC sp_rename '<%= tableName %>.<%= before %>', '<%= after %>', 'COLUMN';",
      newName = Object.keys(attributes)[0];
-    return Utils._.template(query)({
+    return _.template(query, this._templateSettings)({
      tableName: this.quoteTable(tableName),
      before: attrBefore,
      after: newName
@@ -253,7 +254,7 @@ const QueryGenerator = {
      outputFragment = ' OUTPUT INSERTED.*';
    }
-    Utils._.forEach(attrValueHashes, attrValueHash => {
+    _.forEach(attrValueHashes, attrValueHash => {
      // special case for empty objects with primary keys
      const fields = Object.keys(attrValueHash);
      const firstAttr = attributes[fields[0]];
@@ -263,7 +264,7 @@ const QueryGenerator = {
      }
      // normal case
-      Utils._.forOwn(attrValueHash, (value, key) => {
+      _.forOwn(attrValueHash, (value, key) => {
        if (value !== null && attributes[key] && attributes[key].autoIncrement) {
          needIdentityInsertWrapper = true;
        }
@@ -278,7 +279,7 @@ const QueryGenerator = {
    });
    if (allAttributes.length > 0) {
-      Utils._.forEach(attrValueHashes, attrValueHash => {
+      _.forEach(attrValueHashes, attrValueHash => {
        tuples.push('(' +
          allAttributes.map(key =>
            this.escape(attrValueHash[key])).join(',') +
@@ -299,7 +300,7 @@ const QueryGenerator = {
        output: outputFragment
      };
-      let generatedQuery = Utils._.template(allQueries.join(';'))(replacements);
+      let generatedQuery = _.template(allQueries.join(';'), this._templateSettings)(replacements);
      if (needIdentityInsertWrapper) {
        generatedQuery = [
          'SET IDENTITY_INSERT', this.quoteTable(tableName), 'ON;',
@@ -454,7 +455,7 @@ const QueryGenerator = {
    const query = 'DELETE<%= limit %> FROM <%= table %><%= where %>; ' +
                'SELECT @@ROWCOUNT AS AFFECTEDROWS;';
-    if (Utils._.isUndefined(options.limit)) {
+    if (_.isUndefined(options.limit)) {
      options.limit = 1;
    }
@@ -472,12 +473,12 @@ const QueryGenerator = {
      replacements.where = ' WHERE ' + replacements.where;
    }
-    return Utils._.template(query)(replacements);
+    return _.template(query, this._templateSettings)(replacements);
  },
  showIndexesQuery(tableName) {
    const sql = "EXEC sys.sp_helpindex @objname = N'<%= tableName %>';";
-    return Utils._.template(sql)({
+    return _.template(sql, this._templateSettings)({
      tableName: this.quoteTable(tableName)
    });
  },
@@ -499,11 +500,11 @@ const QueryGenerator = {
      indexName: this.quoteIdentifiers(indexName)
    };
-    return Utils._.template(sql)(values);
+    return _.template(sql, this._templateSettings)(values);
  },
  attributeToSQL(attribute) {
-    if (!Utils._.isPlainObject(attribute)) {
+    if (!_.isPlainObject(attribute)) {
      attribute = {
        type: attribute
      };
@@ -527,7 +528,7 @@ const QueryGenerator = {
      // enums are a special case
      template = attribute.type.toSql();
-      template += ' CHECK (' + this.quoteIdentifier(attribute.field) + ' IN(' + Utils._.map(attribute.values, value => {
+      template += ' CHECK (' + this.quoteIdentifier(attribute.field) + ' IN(' + _.map(attribute.values, value => {
        return this.escape(value);
      }).join(', ') + '))';
      return template;
@@ -700,7 +701,7 @@ const QueryGenerator = {
  },
  dropForeignKeyQuery(tableName, foreignKey) {
-    return Utils._.template('ALTER TABLE <%= table %> DROP <%= key %>')({
+    return _.template('ALTER TABLE <%= table %> DROP <%= key %>', this._templateSettings)({
      table: this.quoteTable(tableName),
      key: this.quoteIdentifier(foreignKey)
    });
@@ -711,7 +712,7 @@ const QueryGenerator = {
      "WHERE PARENT_OBJECT_ID = OBJECT_ID('<%= table %>', 'U') " +
      "AND PARENT_COLUMN_ID = (SELECT column_id FROM sys.columns WHERE NAME = ('<%= column %>') " +
      "AND object_id = OBJECT_ID('<%= table %>', 'U'));";
-    return Utils._.template(sql)({
+    return _.template(sql, this._templateSettings)({
      table: this.quoteTable(tableName),
      column: attributeName
    });
@@ -719,7 +720,7 @@ const QueryGenerator = {
  dropConstraintQuery(tableName, constraintName) {
    const sql = 'ALTER TABLE <%= table %> DROP CONSTRAINT <%= constraint %>;';
-    return Utils._.template(sql)({
+    return _.template(sql, this._templateSettings)({
      table: this.quoteTable(tableName),
      constraint: this.quoteIdentifier(constraintName)
    });

--- a/lib/dialects/mssql/query.js
+++ b/lib/dialects/mssql/query.js
@@ -16,7 +16,7 @@ class Query extends AbstractQuery {
    this.instance = options.instance;
    this.model = options.model;
    this.sequelize = sequelize;
-    this.options = Utils._.extend({
+    this.options = _.extend({
      logging: console.log,
      plain: false,
      raw: false
@@ -283,14 +283,14 @@ class Query extends AbstractQuery {
      if (match[4]) {
        const values = match[4].split(',').map(part => part.trim());
        if (uniqueKey) {
-          fields = Utils._.zipObject(uniqueKey.fields, values);
+          fields = _.zipObject(uniqueKey.fields, values);
        } else {
          fields[match[1]] = match[4];
        }
      }
      const errors = [];
-      Utils._.forOwn(fields, (value, field) => {
+      _.forOwn(fields, (value, field) => {
        errors.push(new sequelizeErrors.ValidationErrorItem(
          this.getUniqueConstraintErrorMessage(field),
          'unique violation', field, value
@@ -344,7 +344,7 @@ class Query extends AbstractQuery {
        item.fields = [];
      }
-      Utils._.forEach(item.index_keys.split(','), column => {
+      _.forEach(item.index_keys.split(','), column => {
        let columnName = column.trim();
        if (columnName.indexOf('(-)') !== -1) {
          columnName = columnName.replace('(-)', '');
@@ -361,7 +361,7 @@ class Query extends AbstractQuery {
      return acc;
    }, {});
-    return Utils._.map(data, item => ({
+    return _.map(data, item => ({
      primary: item.index_name.toLowerCase().indexOf('pk') === 0,
      fields: item.fields,
      name: item.index_name,

--- a/lib/dialects/mysql/connection-manager.js
+++ b/lib/dialects/mysql/connection-manager.js
 'use strict';
+const _ = require('lodash');
 const AbstractConnectionManager = require('../abstract/connection-manager');
 const SequelizeErrors = require('../../errors');
 const Utils = require('../../utils');
@@ -175,7 +176,7 @@ class ConnectionManager extends AbstractConnectionManager {
  }
 }
-Utils._.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
+_.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
 module.exports = ConnectionManager;
 module.exports.ConnectionManager = ConnectionManager;

--- a/lib/dialects/mysql/query-generator.js
+++ b/lib/dialects/mysql/query-generator.js
 'use strict';
+const _ = require('lodash');
 const Utils = require('../../utils');
 const AbstractQueryGenerator = require('../abstract/query-generator');
@@ -25,7 +26,7 @@ const QueryGenerator = {
  },
  createTableQuery(tableName, attributes, options) {
-    options = Utils._.extend({
+    options = _.extend({
      engine: 'InnoDB',
      charset: null,
      rowFormat: null
@@ -41,10 +42,10 @@ const QueryGenerator = {
        const dataType = attributes[attr];
        let match;
-        if (Utils._.includes(dataType, 'PRIMARY KEY')) {
+        if (_.includes(dataType, 'PRIMARY KEY')) {
          primaryKeys.push(attr);
-          if (Utils._.includes(dataType, 'REFERENCES')) {
+          if (_.includes(dataType, 'REFERENCES')) {
            // MySQL doesn't support inline REFERENCES declarations: move to the end
            match = dataType.match(/^(.+) (REFERENCES.*)$/);
            attrStr.push(this.quoteIdentifier(attr) + ' ' + match[1].replace(/PRIMARY KEY/, ''));
@@ -52,7 +53,7 @@ const QueryGenerator = {
          } else {
            attrStr.push(this.quoteIdentifier(attr) + ' ' + dataType.replace(/PRIMARY KEY/, ''));
          }
-        } else if (Utils._.includes(dataType, 'REFERENCES')) {
+        } else if (_.includes(dataType, 'REFERENCES')) {
          // MySQL doesn't support inline REFERENCES declarations: move to the end
          match = dataType.match(/^(.+) (REFERENCES.*)$/);
          attrStr.push(this.quoteIdentifier(attr) + ' ' + match[1]);
@@ -66,7 +67,7 @@ const QueryGenerator = {
    const values = {
      table: this.quoteTable(tableName),
      attributes: attrStr.join(', '),
-      comment: options.comment && Utils._.isString(options.comment) ? ' COMMENT ' + this.escape(options.comment) : '',
+      comment: options.comment && _.isString(options.comment) ? ' COMMENT ' + this.escape(options.comment) : '',
      engine: options.engine,
      charset: options.charset ? ' DEFAULT CHARSET=' + options.charset : '',
      collation: options.collate ? ' COLLATE ' + options.collate : '',
@@ -76,12 +77,12 @@ const QueryGenerator = {
    const pkString = primaryKeys.map(pk => this.quoteIdentifier(pk)).join(', ');
    if (options.uniqueKeys) {
-      Utils._.each(options.uniqueKeys, (columns, indexName) => {
+      _.each(options.uniqueKeys, (columns, indexName) => {
        if (!columns.singleField) { // If it's a single field its handled in column def, not as an index
-          if (!Utils._.isString(indexName)) {
+          if (!_.isString(indexName)) {
            indexName = 'uniq_' + tableName + '_' + columns.fields.join('_');
          }
-          values.attributes += ', UNIQUE ' + this.quoteIdentifier(indexName) + ' (' + Utils._.map(columns.fields, this.quoteIdentifier).join(', ') + ')';
+          values.attributes += ', UNIQUE ' + this.quoteIdentifier(indexName) + ' (' + _.map(columns.fields, this.quoteIdentifier).join(', ') + ')';
        }
      });
    }
@@ -96,7 +97,7 @@ const QueryGenerator = {
      }
    }
-    return Utils._.template(query)(values).trim() + ';';
+    return _.template(query, this._templateSettings)(values).trim() + ';';
  },
  showTablesQuery() {
@@ -179,7 +180,7 @@ const QueryGenerator = {
    where = this.getWhereConditions(where);
    let limit = '';
-    if (Utils._.isUndefined(options.limit)) {
+    if (_.isUndefined(options.limit)) {
      options.limit = 1;
    }
@@ -228,7 +229,7 @@ const QueryGenerator = {
  },
  attributeToSQL(attribute, options) {
-    if (!Utils._.isPlainObject(attribute)) {
+    if (!_.isPlainObject(attribute)) {
      attribute = {
        type: attribute
      };

--- a/lib/dialects/mysql/query.js
+++ b/lib/dialects/mysql/query.js
@@ -15,7 +15,7 @@ class Query extends AbstractQuery {
    this.model = options.model;
    this.sequelize = sequelize;
    this.uuid = uuid.v4();
-    this.options = Utils._.extend({
+    this.options = _.extend({
      logging: console.log,
      plain: false,
      raw: false,
@@ -185,13 +185,13 @@ class Query extends AbstractQuery {
        if (uniqueKey) {
          if (uniqueKey.msg) message = uniqueKey.msg;
-          fields = Utils._.zipObject(uniqueKey.fields, values);
+          fields = _.zipObject(uniqueKey.fields, values);
        } else {
          fields[match[2]] = match[1];
        }
        const errors = [];
-        Utils._.forOwn(fields, (value, field) => {
+        _.forOwn(fields, (value, field) => {
          errors.push(new sequelizeErrors.ValidationErrorItem(
            this.getUniqueConstraintErrorMessage(field),
            'unique violation', field, value
@@ -241,7 +241,7 @@ class Query extends AbstractQuery {
      return acc;
    }, {});
-    return Utils._.map(data, item => ({
+    return _.map(data, item => ({
      primary: item.Key_name === 'PRIMARY',
      fields: item.fields,
      name: item.Key_name,

--- a/lib/dialects/postgres/connection-manager.js
+++ b/lib/dialects/postgres/connection-manager.js
 'use strict';
+const _ = require('lodash');
 const AbstractConnectionManager = require('../abstract/connection-manager');
 const Utils = require('../../utils');
 const debug = Utils.getLogger().debugContext('connection:pg');
@@ -54,13 +55,13 @@ class ConnectionManager extends AbstractConnectionManager {
  connect(config) {
    config.user = config.username;
-    const connectionConfig = Utils._.pick(config, [
+    const connectionConfig = _.pick(config, [
      'user', 'password', 'host', 'database', 'port'
    ]);
    if (config.dialectOptions) {
-      Utils._.merge(connectionConfig,
+      _.merge(connectionConfig,
-        Utils._.pick(config.dialectOptions, [
+        _.pick(config.dialectOptions, [
        // see [http://www.postgresql.org/docs/9.3/static/runtime-config-logging.html#GUC-APPLICATION-NAME]
          'application_name',
          // choose the SSL mode with the PGSSLMODE environment variable
@@ -187,7 +188,7 @@ class ConnectionManager extends AbstractConnectionManager {
  }
 }
-Utils._.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
+_.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
 module.exports = ConnectionManager;
 module.exports.ConnectionManager = ConnectionManager;

--- a/lib/dialects/postgres/query-generator.js
+++ b/lib/dialects/postgres/query-generator.js
@@ -34,15 +34,15 @@ const QueryGenerator = {
  createTableQuery(tableName, attributes, options) {
-    options = Utils._.extend({
+    options = _.extend({
    }, options || {});
    //Postgres 9.0 does not support CREATE TABLE IF NOT EXISTS, 9.1 and above do
-    const databaseVersion = Utils._.get(this, 'sequelize.options.databaseVersion', 0);
+    const databaseVersion = _.get(this, 'sequelize.options.databaseVersion', 0);
    const attrStr = [];
    let comments = '';
-    if (options.comment && Utils._.isString(options.comment)) {
+    if (options.comment && _.isString(options.comment)) {
      comments += '; COMMENT ON TABLE <%= table %> IS ' + this.escape(options.comment);
    }
@@ -61,11 +61,11 @@ const QueryGenerator = {
    const values = {
      table: this.quoteTable(tableName),
      attributes: attrStr.join(', '),
-      comments: Utils._.template(comments)({ table: this.quoteTable(tableName) })
+      comments: _.template(comments, this._templateSettings)({ table: this.quoteTable(tableName) })
    };
    if (options.uniqueKeys) {
-      Utils._.each(options.uniqueKeys, columns => {
+      _.each(options.uniqueKeys, columns => {
        if (!columns.singleField) { // If it's a single field its handled in column def, not as an index
          values.attributes += ', UNIQUE (' + columns.fields.map(f => this.quoteIdentifiers(f)).join(', ') + ')';
        }
@@ -264,28 +264,28 @@ const QueryGenerator = {
      let attrSql = '';
      if (definition.indexOf('NOT NULL') > 0) {
-        attrSql += Utils._.template(query)({
+        attrSql += _.template(query, this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: this.quoteIdentifier(attributeName) + ' SET NOT NULL'
        });
        definition = definition.replace('NOT NULL', '').trim();
      } else if (!definition.match(/REFERENCES/)) {
-        attrSql += Utils._.template(query)({
+        attrSql += _.template(query, this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: this.quoteIdentifier(attributeName) + ' DROP NOT NULL'
        });
      }
      if (definition.indexOf('DEFAULT') > 0) {
-        attrSql += Utils._.template(query)({
+        attrSql += _.template(query, this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: this.quoteIdentifier(attributeName) + ' SET DEFAULT ' + definition.match(/DEFAULT ([^;]+)/)[1]
        });
        definition = definition.replace(/(DEFAULT[^;]+)/, '').trim();
      } else if (!definition.match(/REFERENCES/)) {
-        attrSql += Utils._.template(query)({
+        attrSql += _.template(query, this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: this.quoteIdentifier(attributeName) + ' DROP DEFAULT'
        });
@@ -300,7 +300,7 @@ const QueryGenerator = {
      if (definition.match(/UNIQUE;*$/)) {
        definition = definition.replace(/UNIQUE;*$/, '');
-        attrSql += Utils._.template(query.replace('ALTER COLUMN', ''))({
+        attrSql += _.template(query.replace('ALTER COLUMN', ''), this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: 'ADD CONSTRAINT ' + this.quoteIdentifier(attributeName + '_unique_idx') + ' UNIQUE (' + this.quoteIdentifier(attributeName) + ')'
        });
@@ -308,12 +308,12 @@ const QueryGenerator = {
      if (definition.match(/REFERENCES/)) {
        definition = definition.replace(/.+?(?=REFERENCES)/, '');
-        attrSql += Utils._.template(query.replace('ALTER COLUMN', ''))({
+        attrSql += _.template(query.replace('ALTER COLUMN', ''), this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: 'ADD CONSTRAINT ' + this.quoteIdentifier(attributeName + '_foreign_idx') + ' FOREIGN KEY (' + this.quoteIdentifier(attributeName) + ') ' + definition
        });
      } else {
-        attrSql += Utils._.template(query)({
+        attrSql += _.template(query, this._templateSettings)({
          tableName: this.quoteTable(tableName),
          query: this.quoteIdentifier(attributeName) + ' TYPE ' + definition
        });
@@ -330,7 +330,7 @@ const QueryGenerator = {
    const attrString = [];
    for (const attributeName in attributes) {
-      attrString.push(Utils._.template('<%= before %> TO <%= after %>')({
+      attrString.push(_.template('<%= before %> TO <%= after %>', this._templateSettings)({
        before: this.quoteIdentifier(attrBefore),
        after: this.quoteIdentifier(attributeName)
      }));
@@ -391,7 +391,7 @@ const QueryGenerator = {
      return query;
    }
-    if (Utils._.isUndefined(options.limit)) {
+    if (_.isUndefined(options.limit)) {
      options.limit = 1;
    }
@@ -420,13 +420,13 @@ const QueryGenerator = {
      replacements.where = ' WHERE ' + replacements.where;
    }
-    return Utils._.template(query)(replacements);
+    return _.template(query, this._templateSettings)(replacements);
  },
  showIndexesQuery(tableName) {
    let schemaJoin = '';
    let schemaWhere = '';
-    if (!Utils._.isString(tableName)) {
+    if (!_.isString(tableName)) {
      schemaJoin = ', pg_namespace s';
      schemaWhere = ` AND s.oid = t.relnamespace AND s.nspname = '${tableName.schema}'`;
      tableName = tableName.tableName;
@@ -483,7 +483,7 @@ const QueryGenerator = {
  },
  attributeToSQL(attribute) {
-    if (!Utils._.isPlainObject(attribute)) {
+    if (!_.isPlainObject(attribute)) {
      attribute = {
        type: attribute
      };
@@ -494,7 +494,7 @@ const QueryGenerator = {
      if (attribute.type.values && !attribute.values) attribute.values = attribute.type.values;
      if (Array.isArray(attribute.values) && attribute.values.length > 0) {
-        type = 'ENUM(' + Utils._.map(attribute.values, value => this.escape(value)).join(', ') + ')';
+        type = 'ENUM(' + _.map(attribute.values, value => this.escape(value)).join(', ') + ')';
      } else {
        throw new Error("Values for ENUM haven't been defined.");
      }
@@ -653,16 +653,16 @@ const QueryGenerator = {
  },
  expandFunctionParamList(params) {
-    if (Utils._.isUndefined(params) || !Utils._.isArray(params)) {
+    if (_.isUndefined(params) || !_.isArray(params)) {
      throw new Error('expandFunctionParamList: function parameters array required, including an empty one for no arguments');
    }
    const paramList = [];
-    Utils._.each(params, curParam => {
+    _.each(params, curParam => {
      const paramDef = [];
-      if (Utils._.has(curParam, 'type')) {
+      if (_.has(curParam, 'type')) {
-        if (Utils._.has(curParam, 'direction')) { paramDef.push(curParam.direction); }
+        if (_.has(curParam, 'direction')) { paramDef.push(curParam.direction); }
-        if (Utils._.has(curParam, 'name')) { paramDef.push(curParam.name); }
+        if (_.has(curParam, 'name')) { paramDef.push(curParam.name); }
        paramDef.push(curParam.type);
      } else {
        throw new Error('function or trigger used with a parameter without any type');
@@ -677,7 +677,7 @@ const QueryGenerator = {
  },
  expandOptions(options) {
-    return Utils._.isUndefined(options) || Utils._.isEmpty(options) ?
+    return _.isUndefined(options) || _.isEmpty(options) ?
      '' : '\n\t' + options.join('\n\t');
  },
@@ -689,7 +689,7 @@ const QueryGenerator = {
      'after_constraint': 'AFTER'
    };
-    if (!Utils._.has(EVENT_DECODER, eventSpecifier)) {
+    if (!_.has(EVENT_DECODER, eventSpecifier)) {
      throw new Error('Invalid trigger event specified: ' + eventSpecifier);
    }
@@ -701,11 +701,11 @@ const QueryGenerator = {
  },
  expandTriggerEventSpec(fireOnSpec) {
-    if (Utils._.isEmpty(fireOnSpec)) {
+    if (_.isEmpty(fireOnSpec)) {
      throw new Error('no table change events specified to trigger on');
    }
-    return Utils._.map(fireOnSpec, (fireValue, fireKey) => {
+    return _.map(fireOnSpec, (fireValue, fireKey) => {
      const EVENT_MAP = {
        'insert': 'INSERT',
        'update': 'UPDATE',
@@ -713,13 +713,13 @@ const QueryGenerator = {
        'truncate': 'TRUNCATE'
      };
-      if (!Utils._.has(EVENT_MAP, fireValue)) {
+      if (!_.has(EVENT_MAP, fireValue)) {
        throw new Error('parseTriggerEventSpec: undefined trigger event ' + fireKey);
      }
      let eventSpec = EVENT_MAP[fireValue];
      if (eventSpec === 'UPDATE') {
-        if (Utils._.isArray(fireValue) && fireValue.length > 0) {
+        if (_.isArray(fireValue) && fireValue.length > 0) {
          eventSpec += ' OF ' + fireValue.join(', ');
        }
      }
@@ -814,12 +814,12 @@ const QueryGenerator = {
  },
  dataTypeMapping(tableName, attr, dataType) {
-    if (Utils._.includes(dataType, 'PRIMARY KEY')) {
+    if (_.includes(dataType, 'PRIMARY KEY')) {
      dataType = dataType.replace(/PRIMARY KEY/, '');
    }
-    if (Utils._.includes(dataType, 'SERIAL')) {
+    if (_.includes(dataType, 'SERIAL')) {
-      if (Utils._.includes(dataType, 'BIGINT')) {
+      if (_.includes(dataType, 'BIGINT')) {
        dataType = dataType.replace(/SERIAL/, 'BIGSERIAL');
        dataType = dataType.replace(/BIGINT/, '');
      } else {

--- a/lib/dialects/postgres/query.js
+++ b/lib/dialects/postgres/query.js
@@ -56,7 +56,7 @@ class Query extends AbstractQuery {
  run(sql, parameters) {
    this.sql = sql;
-    if (!Utils._.isEmpty(this.options.searchPath)) {
+    if (!_.isEmpty(this.options.searchPath)) {
      this.sql = this.sequelize.getQueryInterface().QueryGenerator.setSearchPath(this.options.searchPath) + sql;
    }

--- a/lib/dialects/sqlite/query-generator.js
+++ b/lib/dialects/sqlite/query-generator.js
@@ -28,21 +28,21 @@ const QueryGenerator = {
    options = options || {};
    const primaryKeys = [];
-    const needsMultiplePrimaryKeys = Utils._.values(attributes).filter(definition => _.includes(definition, 'PRIMARY KEY')).length > 1;
+    const needsMultiplePrimaryKeys = _.values(attributes).filter(definition => _.includes(definition, 'PRIMARY KEY')).length > 1;
    const attrArray = [];
    for (const attr in attributes) {
      if (attributes.hasOwnProperty(attr)) {
        let dataType = attributes[attr];
-        const containsAutoIncrement = Utils._.includes(dataType, 'AUTOINCREMENT');
+        const containsAutoIncrement = _.includes(dataType, 'AUTOINCREMENT');
        if (containsAutoIncrement) {
          dataType = dataType.replace(/BIGINT/, 'INTEGER');
        }
        let dataTypeString = dataType;
-        if (Utils._.includes(dataType, 'PRIMARY KEY')) {
+        if (_.includes(dataType, 'PRIMARY KEY')) {
-          if (Utils._.includes(dataType, 'INTEGER')) { // Only INTEGER is allowed for primary key, see https://github.com/sequelize/sequelize/issues/969 (no lenght, unsigned etc)
+          if (_.includes(dataType, 'INTEGER')) { // Only INTEGER is allowed for primary key, see https://github.com/sequelize/sequelize/issues/969 (no lenght, unsigned etc)
            dataTypeString = containsAutoIncrement ? 'INTEGER PRIMARY KEY AUTOINCREMENT' : 'INTEGER PRIMARY KEY';
          }
@@ -60,7 +60,7 @@ const QueryGenerator = {
    const pkString = primaryKeys.map(pk => this.quoteIdentifier(pk)).join(', ');
    if (options.uniqueKeys) {
-      Utils._.each(options.uniqueKeys, columns => {
+      _.each(options.uniqueKeys, columns => {
        if (!columns.singleField) { // If it's a single field its handled in column def, not as an index
          attrStr += ', UNIQUE (' + columns.fields.map(field => this.quoteIdentifier(field)).join(', ') + ')';
        }
@@ -299,7 +299,7 @@ const QueryGenerator = {
      const dataType = attributes[name];
      const fieldName = dataType.field || name;
-      if (Utils._.isObject(dataType)) {
+      if (_.isObject(dataType)) {
        let sql = dataType.type.toString();
        if (dataType.hasOwnProperty('allowNull') && !dataType.allowNull) {

--- a/lib/dialects/sqlite/query-interface.js
+++ b/lib/dialects/sqlite/query-interface.js
 'use strict';
-const Utils = require('../../utils');
+const _ = require('lodash');
 const Promise = require('../../promise');
 const UnknownConstraintError = require('../../errors').UnknownConstraintError;
@@ -37,7 +37,7 @@ function removeColumn(tableName, attributeName, options) {
    const sql = this.QueryGenerator.removeColumnQuery(tableName, fields);
    const subQueries = sql.split(';').filter(q => q !== '');
-    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
+    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', _.assign({raw: true}, options)));
  });
 }
 exports.removeColumn = removeColumn;
@@ -68,7 +68,7 @@ function changeColumn(tableName, attributes, options) {
    const sql = this.QueryGenerator.removeColumnQuery(tableName, fields);
    const subQueries = sql.split(';').filter(q => q !== '');
-    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
+    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', _.assign({raw: true}, options)));
  });
 }
 exports.changeColumn = changeColumn;
@@ -94,13 +94,13 @@ function renameColumn(tableName, attrNameBefore, attrNameAfter, options) {
  options = options || {};
  return this.describeTable(tableName, options).then(fields => {
-    fields[attrNameAfter] = Utils._.clone(fields[attrNameBefore]);
+    fields[attrNameAfter] = _.clone(fields[attrNameBefore]);
    delete fields[attrNameBefore];
    const sql = this.QueryGenerator.renameColumnQuery(tableName, attrNameBefore, attrNameAfter, fields);
    const subQueries = sql.split(';').filter(q => q !== '');
-    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
+    return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', _.assign({raw: true}, options)));
  });
 }
 exports.renameColumn = renameColumn;
@@ -138,7 +138,7 @@ function removeConstraint(tableName, constraintName, options) {
      const sql = this.QueryGenerator._alterConstraintQuery(tableName, fields, createTableSql);
      const subQueries = sql.split(';').filter(q => q !== '');
-      return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
+      return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', _.assign({raw: true}, options)));
    });
 }
 exports.removeConstraint = removeConstraint;
@@ -162,7 +162,7 @@ function addConstraint(tableName, options) {
      const sql = this.QueryGenerator._alterConstraintQuery(tableName, fields, createTableSql);
      const subQueries = sql.split(';').filter(q => q !== '');
-      return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', Utils._.assign({raw: true}, options)));
+      return Promise.each(subQueries, subQuery => this.sequelize.query(subQuery + ';', _.assign({raw: true}, options)));
    });
 }
 exports.addConstraint = addConstraint;
--- a/lib/hooks.js
+++ b/lib/hooks.js
 'use strict';
+const _ = require('lodash');
 const Utils = require('./utils');
 const Promise = require('./promise');
 const debug = Utils.getLogger().debugContext('hooks');
@@ -67,7 +68,7 @@ const getProxiedHooks = hookType =>
 const Hooks = {
  replaceHookAliases(hooks) {
-    Utils._.each(hooks, (hooksArray, name) => {
+    _.each(hooks, (hooksArray, name) => {
      // Does an alias for this hook name exist?
      const realHookName = hookAliases[name];
      if (realHookName) {
@@ -148,7 +149,7 @@ const Hooks = {
    // check for proxies, add them too
    hookType = getProxiedHooks(hookType);
-    Utils._.each(hookType, type => {
+    _.each(hookType, type => {
      this.options.hooks[type] = this.options.hooks[type] || [];
      this.options.hooks[type].push(name ? {name, fn} : fn);
    });
@@ -209,7 +210,7 @@ Hooks.hasHooks = Hooks.hasHook;
 function applyTo(target) {
-  Utils._.mixin(target, Hooks);
+  _.mixin(target, Hooks);
  const allHooks = Object.keys(hookTypes).concat(Object.keys(hookAliases));
  for (const hook of allHooks) {

--- a/lib/instance-validator.js
+++ b/lib/instance-validator.js
@@ -22,11 +22,11 @@ class InstanceValidator {
    options = _.clone(options) || {};
    if (options.fields && !options.skip) {
-      options.skip = Utils._.difference(Object.keys(modelInstance.constructor.rawAttributes), options.fields);
+      options.skip = _.difference(Object.keys(modelInstance.constructor.rawAttributes), options.fields);
    }
    // assign defined and default options
-    this.options = Utils._.defaults(options, {
+    this.options = _.defaults(options, {
      skip: [],
      hooks: true
    });
@@ -124,7 +124,7 @@ class InstanceValidator {
  _builtinValidators() {
    // promisify all attribute invocations
    const validators = [];
-    Utils._.forIn(this.modelInstance.rawAttributes, (rawAttribute, field) => {
+    _.forIn(this.modelInstance.rawAttributes, (rawAttribute, field) => {
      if (this.options.skip.indexOf(field) >= 0) {
        return;
      }
@@ -152,7 +152,7 @@ class InstanceValidator {
   */
  _customValidators() {
    const validators = [];
-    Utils._.each(this.modelInstance._modelOptions.validate, (validator, validatorType) => {
+    _.each(this.modelInstance._modelOptions.validate, (validator, validatorType) => {
      if (this.options.skip.indexOf(validatorType) >= 0) {
        return;
      }
@@ -185,7 +185,7 @@ class InstanceValidator {
    // Promisify each validator
    const validators = [];
-    Utils._.forIn(this.modelInstance.validators[field], (test, validatorType) => {
+    _.forIn(this.modelInstance.validators[field], (test, validatorType) => {
      if (['isUrl', 'isURL', 'isEmail'].indexOf(validatorType) !== -1) {
        // Preserve backwards compat. Validator.js now expects the second param to isURL and isEmail to be an object

--- a/lib/model.js
+++ b/lib/model.js
@@ -81,7 +81,7 @@ class Model {
    deletedAtObject[deletedAtAttribute.field || deletedAtCol] = deletedAtDefaultValue;
-    if (Utils._.isEmpty(options.where)) {
+    if (_.isEmpty(options.where)) {
      options.where = deletedAtObject;
    } else {
      options.where = { $and: [deletedAtObject, options.where] };
@@ -145,19 +145,19 @@ class Model {
      };
    }
-    const existingAttributes = Utils._.clone(this.rawAttributes);
+    const existingAttributes = _.clone(this.rawAttributes);
    this.rawAttributes = {};
-    Utils._.each(head, (value, attr) => {
+    _.each(head, (value, attr) => {
      this.rawAttributes[attr] = value;
    });
-    Utils._.each(existingAttributes, (value, attr) => {
+    _.each(existingAttributes, (value, attr) => {
      this.rawAttributes[attr] = value;
    });
-    Utils._.each(tail, (value, attr) => {
+    _.each(tail, (value, attr) => {
-      if (Utils._.isUndefined(this.rawAttributes[attr])) {
+      if (_.isUndefined(this.rawAttributes[attr])) {
        this.rawAttributes[attr] = value;
      }
    });
@@ -319,7 +319,7 @@ class Model {
    const used = [];
    (function addAllIncludes(parent, includes) {
-      Utils._.forEach(parent.associations, association => {
+      _.forEach(parent.associations, association => {
        if (all !== true && all.indexOf(association.associationType) === -1) {
          return;
        }
@@ -334,7 +334,7 @@ class Model {
          predicate.as = as;
        }
-        if (Utils._.find(includes, predicate)) {
+        if (_.find(includes, predicate)) {
          return;
        }
@@ -496,7 +496,7 @@ class Model {
      if (!include.include) include.include = [];
      const through = include.association.through;
-      include.through = Utils._.defaults(include.through || {}, {
+      include.through = _.defaults(include.through || {}, {
        model: through.model,
        as: through.model.name,
        association: {
@@ -610,7 +610,7 @@ class Model {
      }
    }
-    Utils._.forEach(includes, include => {
+    _.forEach(includes, include => {
      this._expandIncludeAll.call(include.model, include);
    });
  }
@@ -779,7 +779,7 @@ class Model {
    // error check options
    _.each(options.validate, (validator, validatorType) => {
-      if (_.includes(Utils._.keys(attributes), validatorType)) {
+      if (_.includes(_.keys(attributes), validatorType)) {
        throw new Error('A model validator function must not have the same name as a field. Model: ' + this.name + ', field/validation name: ' + validatorType);
      }
@@ -823,12 +823,12 @@ class Model {
    }
    // Add head and tail default attributes (id, timestamps)
-    this._readOnlyAttributes = Utils._.values(this._timestampAttributes);
+    this._readOnlyAttributes = _.values(this._timestampAttributes);
    if (this._versionAttribute) {
      this._readOnlyAttributes.push(this._versionAttribute);
    }
    this._hasReadOnlyAttributes = this._readOnlyAttributes && this._readOnlyAttributes.length;
-    this._isReadOnlyAttribute = Utils._.memoize(key => this._hasReadOnlyAttributes && this._readOnlyAttributes.indexOf(key) !== -1);
+    this._isReadOnlyAttribute = _.memoize(key => this._hasReadOnlyAttributes && this._readOnlyAttributes.indexOf(key) !== -1);
    this._addDefaultAttributes();
    this.refreshAttributes();
@@ -873,12 +873,12 @@ class Model {
    this.prototype._customGetters = {};
    this.prototype._customSetters = {};
-    Utils._.each(['get', 'set'], type => {
+    _.each(['get', 'set'], type => {
      const opt = type + 'terMethods';
-      const funcs = Utils._.clone(Utils._.isObject(this.options[opt]) ? this.options[opt] : {});
+      const funcs = _.clone(_.isObject(this.options[opt]) ? this.options[opt] : {});
      const _custom = type === 'get' ? this.prototype._customGetters : this.prototype._customSetters;
-      Utils._.each(funcs, (method, attribute) => {
+      _.each(funcs, (method, attribute) => {
        _custom[attribute] = method;
        if (type === 'get') {
@@ -893,7 +893,7 @@ class Model {
        }
      });
-      Utils._.each(this.rawAttributes, (options, attribute) => {
+      _.each(this.rawAttributes, (options, attribute) => {
        if (options.hasOwnProperty(type)) {
          _custom[attribute] = options[type];
        }
@@ -910,7 +910,7 @@ class Model {
        }
      });
-      Utils._.each(funcs, (fct, name) => {
+      _.each(funcs, (fct, name) => {
        if (!attributeManipulation[name]) {
          attributeManipulation[name] = {
            configurable: true
@@ -969,7 +969,7 @@ class Model {
      }
      if (definition.hasOwnProperty('defaultValue')) {
-        this._defaultValues[name] = Utils._.partial(Utils.toDefaultValue, definition.defaultValue);
+        this._defaultValues[name] = _.partial(Utils.toDefaultValue, definition.defaultValue);
      }
      if (definition.hasOwnProperty('unique') && definition.unique !== false) {
@@ -1006,7 +1006,7 @@ class Model {
      }
    });
    // Create a map of field to attribute names
-    this.fieldAttributeMap = Utils._.reduce(this.fieldRawAttributesMap, (map, value, key) => {
+    this.fieldAttributeMap = _.reduce(this.fieldRawAttributesMap, (map, value, key) => {
      if (key !== value.fieldName) {
        map[key] = value.fieldName;
      }
@@ -1016,33 +1016,33 @@ class Model {
    this.uniqueKeys = this.options.uniqueKeys;
    this._hasBooleanAttributes = !!this._booleanAttributes.length;
-    this._isBooleanAttribute = Utils._.memoize(key => this._booleanAttributes.indexOf(key) !== -1);
+    this._isBooleanAttribute = _.memoize(key => this._booleanAttributes.indexOf(key) !== -1);
    this._hasDateAttributes = !!this._dateAttributes.length;
-    this._isDateAttribute = Utils._.memoize(key => this._dateAttributes.indexOf(key) !== -1);
+    this._isDateAttribute = _.memoize(key => this._dateAttributes.indexOf(key) !== -1);
    this._hasHstoreAttributes = !!this._hstoreAttributes.length;
-    this._isHstoreAttribute = Utils._.memoize(key => this._hstoreAttributes.indexOf(key) !== -1);
+    this._isHstoreAttribute = _.memoize(key => this._hstoreAttributes.indexOf(key) !== -1);
    this._hasRangeAttributes = !!this._rangeAttributes.length;
-    this._isRangeAttribute = Utils._.memoize(key => this._rangeAttributes.indexOf(key) !== -1);
+    this._isRangeAttribute = _.memoize(key => this._rangeAttributes.indexOf(key) !== -1);
    this._hasJsonAttributes = !!this._jsonAttributes.length;
-    this._isJsonAttribute = Utils._.memoize(key => this._jsonAttributes.indexOf(key) !== -1);
+    this._isJsonAttribute = _.memoize(key => this._jsonAttributes.indexOf(key) !== -1);
    this._hasVirtualAttributes = !!this._virtualAttributes.length;
-    this._isVirtualAttribute = Utils._.memoize(key => this._virtualAttributes.indexOf(key) !== -1);
+    this._isVirtualAttribute = _.memoize(key => this._virtualAttributes.indexOf(key) !== -1);
    this._hasGeometryAttributes = !!this._geometryAttributes.length;
-    this._isGeometryAttribute = Utils._.memoize(key => this._geometryAttributes.indexOf(key) !== -1);
+    this._isGeometryAttribute = _.memoize(key => this._geometryAttributes.indexOf(key) !== -1);
-    this._hasDefaultValues = !Utils._.isEmpty(this._defaultValues);
+    this._hasDefaultValues = !_.isEmpty(this._defaultValues);
    // DEPRECATE: All code base is free from this.attributes now
    //            This should be removed in v5
    this.attributes = this.rawAttributes;
-    this.tableAttributes = Utils._.omit(this.rawAttributes, this._virtualAttributes);
+    this.tableAttributes = _.omit(this.rawAttributes, this._virtualAttributes);
    this.prototype._hasCustomGetters = Object.keys(this.prototype._customGetters).length;
    this.prototype._hasCustomSetters = Object.keys(this.prototype._customSetters).length;
@@ -1058,7 +1058,7 @@ class Model {
    this.prototype.rawAttributes = this.rawAttributes;
    this.prototype.attributes = Object.keys(this.prototype.rawAttributes);
-    this.prototype._isAttribute = Utils._.memoize(key => this.prototype.attributes.indexOf(key) !== -1);
+    this.prototype._isAttribute = _.memoize(key => this.prototype.attributes.indexOf(key) !== -1);
    // Primary key convenience constiables
    this.primaryKeyAttributes = Object.keys(this.primaryKeys);
@@ -1068,7 +1068,7 @@ class Model {
    }
    this._hasPrimaryKeys = this.primaryKeyAttributes.length > 0;
-    this._isPrimaryKey = Utils._.memoize(key => this.primaryKeyAttributes.indexOf(key) !== -1);
+    this._isPrimaryKey = _.memoize(key => this.primaryKeyAttributes.indexOf(key) !== -1);
  }
  /**
@@ -2002,9 +2002,9 @@ class Model {
    return this.find(options).then(instance => {
      if (instance === null) {
-        values = Utils._.clone(options.defaults) || {};
+        values = _.clone(options.defaults) || {};
-        if (Utils._.isPlainObject(options.where)) {
+        if (_.isPlainObject(options.where)) {
-          values = Utils._.defaults(values, options.where);
+          values = _.defaults(values, options.where);
        }
        instance = this.build(values);
@@ -2063,8 +2063,8 @@ class Model {
        return [instance, false];
      }
-      values = Utils._.clone(options.defaults) || {};
+      values = _.clone(options.defaults) || {};
-      if (Utils._.isPlainObject(options.where)) {
+      if (_.isPlainObject(options.where)) {
        values = _.defaults(values, options.where);
      }
@@ -2133,8 +2133,8 @@ class Model {
      );
    }
-    let values = Utils._.clone(options.defaults) || {};
+    let values = _.clone(options.defaults) || {};
-    if (Utils._.isPlainObject(options.where)) {
+    if (_.isPlainObject(options.where)) {
      values = _.defaults(values, options.where);
    }
@@ -2174,7 +2174,7 @@ class Model {
   * @return {Promise<created>} Returns a boolean indicating whether the row was created or updated.
   */
  static upsert(values, options) {
-    options = Utils._.extend({
+    options = _.extend({
      hooks: true
    }, Utils.cloneDeep(options || {}));
@@ -2255,7 +2255,7 @@ class Model {
      return Promise.resolve([]);
    }
-    options = Utils._.extend({
+    options = _.extend({
      validate: false,
      hooks: true,
      individualHooks: false,
@@ -2274,9 +2274,9 @@ class Model {
    if (options.updateOnDuplicate) {
      // By default, all attributes except 'createdAt' can be updated
-      let updatableFields = Utils._.pull(Object.keys(this.tableAttributes), 'createdAt');
+      let updatableFields = _.pull(Object.keys(this.tableAttributes), 'createdAt');
-      if (Utils._.isArray(options.updateOnDuplicate) && !Utils._.isEmpty(options.updateOnDuplicate)) {
+      if (_.isArray(options.updateOnDuplicate) && !_.isEmpty(options.updateOnDuplicate)) {
-        updatableFields = Utils._.intersection(updatableFields, options.updateOnDuplicate);
+        updatableFields = _.intersection(updatableFields, options.updateOnDuplicate);
      }
      options.updateOnDuplicate = updatableFields;
    }
@@ -2332,7 +2332,7 @@ class Model {
      if (options.individualHooks) {
        // Create each instance individually
        return Promise.map(instances, instance => {
-          const individualOptions = Utils._.clone(options);
+          const individualOptions = _.clone(options);
          delete individualOptions.fields;
          delete individualOptions.individualHooks;
          delete individualOptions.ignoreDuplicates;
@@ -2347,7 +2347,7 @@ class Model {
        // Create all in one query
        // Recreate records from instances to represent any changes made in hooks or validation
        records = instances.map(instance => {
-          return Utils._.omit(instance.dataValues, this._virtualAttributes);
+          return _.omit(instance.dataValues, this._virtualAttributes);
        });
        // Map attributes for serial identification
@@ -2513,7 +2513,7 @@ class Model {
  static restore(options) {
    if (!this._timestampAttributes.deletedAt) throw new Error('Model is not paranoid');
-    options = Utils._.extend({
+    options = _.extend({
      hooks: true,
      individualHooks: false
    }, options || {});
@@ -2634,16 +2634,16 @@ class Model {
        build.set(this._timestampAttributes.updatedAt, values[this._timestampAttributes.updatedAt], { raw: true });
        if (options.sideEffects) {
-          values = Utils._.assign(values, Utils._.pick(build.get(), build.changed()));
+          values = _.assign(values, _.pick(build.get(), build.changed()));
-          options.fields = Utils._.union(options.fields, Object.keys(values));
+          options.fields = _.union(options.fields, Object.keys(values));
        }
        // We want to skip validations for all other fields
-        options.skip = Utils._.difference(Object.keys(this.rawAttributes), Object.keys(values));
+        options.skip = _.difference(Object.keys(this.rawAttributes), Object.keys(values));
        return build.validate(options).then(attributes => {
          options.skip = undefined;
          if (attributes && attributes.dataValues) {
-            values = Utils._.pick(attributes.dataValues, Object.keys(values));
+            values = _.pick(attributes.dataValues, Object.keys(values));
          }
        });
      }
@@ -2676,9 +2676,9 @@ class Model {
          return Promise.map(instances, instance => {
            // Record updates in instances dataValues
-            Utils._.extend(instance.dataValues, values);
+            _.extend(instance.dataValues, values);
            // Set the changed fields on the instance
-            Utils._.forIn(valuesUse, (newValue, attr) => {
+            _.forIn(valuesUse, (newValue, attr) => {
              if (newValue !== instance._previousDataValues[attr]) {
                instance.setDataValue(attr, newValue);
              }
@@ -2688,7 +2688,7 @@ class Model {
            return this.runHooks('beforeUpdate', instance, options).then(() => {
              if (!different) {
                const thisChangedValues = {};
-                Utils._.forIn(instance.dataValues, (newValue, attr) => {
+                _.forIn(instance.dataValues, (newValue, attr) => {
                  if (newValue !== instance._previousDataValues[attr]) {
                    thisChangedValues[attr] = newValue;
                  }
@@ -2697,7 +2697,7 @@ class Model {
                if (!changedValues) {
                  changedValues = thisChangedValues;
                } else {
-                  different = !Utils._.isEqual(changedValues, thisChangedValues);
+                  different = !_.isEqual(changedValues, thisChangedValues);
                }
              }
@@ -2712,14 +2712,14 @@ class Model {
              if (keys.length) {
                // Hooks change values - record changes in valuesUse so they are executed
                valuesUse = changedValues;
-                options.fields = Utils._.union(options.fields, keys);
+                options.fields = _.union(options.fields, keys);
              }
              return;
            } else {
              // Hooks change values in a different way for each record
              // Do not run original query but save each record individually
              return Promise.map(instances, instance => {
-                const individualOptions = Utils._.clone(options);
+                const individualOptions = _.clone(options);
                delete individualOptions.individualHooks;
                individualOptions.hooks = false;
                individualOptions.validate = false;
@@ -2887,10 +2887,10 @@ class Model {
    const where = _.extend({}, options.where);
    let values = {};
-    if (Utils._.isString(fields)) {
+    if (_.isString(fields)) {
      values[fields] = options.by;
-    } else if (Utils._.isArray(fields)) {
+    } else if (_.isArray(fields)) {
-      Utils._.each(fields, field => {
+      _.each(fields, field => {
        values[field] = options.by;
      });
    } else { // Assume fields is key-value pairs
@@ -3474,7 +3474,7 @@ class Model {
    if (options.silent === true && !(this.isNewRecord && this.get(updatedAtAttr, {raw: true}))) {
      // UpdateAtAttr might have been added as a result of Object.keys(Model.attributes). In that case we have to remove it again
-      Utils._.remove(options.fields, val => val === updatedAtAttr);
+      _.remove(options.fields, val => val === updatedAtAttr);
      updatedAtAttr = false;
    }
@@ -3778,7 +3778,7 @@ class Model {
   */
  destroy(options) {
-    options = Utils._.extend({
+    options = _.extend({
      hooks: true,
      force: false
    }, options);
@@ -3869,7 +3869,7 @@ class Model {
  restore(options) {
    if (!this.constructor._timestampAttributes.deletedAt) throw new Error('Model is not paranoid');
-    options = Utils._.extend({
+    options = _.extend({
      hooks: true,
      force: false
    }, options);
@@ -3979,7 +3979,7 @@ class Model {
      return false;
    }
-    return Utils._.every(this.constructor.primaryKeyAttributes, attribute => this.get(attribute, {raw: true}) === other.get(attribute, {raw: true}));
+    return _.every(this.constructor.primaryKeyAttributes, attribute => this.get(attribute, {raw: true}) === other.get(attribute, {raw: true}));
  }
  /**
@@ -4003,7 +4003,7 @@ class Model {
   * @return {object}
   */
  toJSON() {
-    return Utils._.clone(
+    return _.clone(
      this.get({
        plain: true
      })
@@ -4112,7 +4112,7 @@ Model.findAndCountAll = Model.findAndCount;
 Model.findOrInitialize = Model.findOrBuild;
 Model.insertOrUpdate = Model.upsert;
-Utils._.extend(Model, associationsMixin);
+_.extend(Model, associationsMixin);
 Hooks.applyTo(Model);
 module.exports = Model;
--- a/lib/query-interface.js
+++ b/lib/query-interface.js
@@ -81,8 +81,8 @@ class QueryInterface {
    const showSchemasSql = this.QueryGenerator.showSchemasQuery();
-    return this.sequelize.query(showSchemasSql, options).then(schemaNames => Utils._.flatten(
+    return this.sequelize.query(showSchemasSql, options).then(schemaNames => _.flatten(
-      Utils._.map(schemaNames, value => value.schema_name ? value.schema_name : value)
+      _.map(schemaNames, value => value.schema_name ? value.schema_name : value)
    ));
  }
@@ -161,8 +161,8 @@ class QueryInterface {
    options = _.clone(options) || {};
-    attributes = Utils._.mapValues(attributes, attribute => {
+    attributes = _.mapValues(attributes, attribute => {
-      if (!Utils._.isPlainObject(attribute)) {
+      if (!_.isPlainObject(attribute)) {
        attribute = { type: attribute, allowNull: true };
      }
@@ -340,7 +340,7 @@ class QueryInterface {
          tableNames.forEach(tableName => {
            let normalizedTableName = tableName;
-            if (Utils._.isObject(tableName)) {
+            if (_.isObject(tableName)) {
              normalizedTableName = tableName.schema + '.' + tableName.tableName;
            }
@@ -424,7 +424,7 @@ class QueryInterface {
    });
    const showTablesSql = this.QueryGenerator.showTablesQuery();
-    return this.sequelize.query(showTablesSql, options).then(tableNames => Utils._.flatten(tableNames));
+    return this.sequelize.query(showTablesSql, options).then(tableNames => _.flatten(tableNames));
  }
  /**
@@ -476,7 +476,7 @@ class QueryInterface {
      // If no data is returned from the query, then the table name may be wrong.
      // Query generators that use information_schema for retrieving table info will just return an empty result set,
      // it will not throw an error like built-ins do (e.g. DESCRIBE on MySql).
-      if (Utils._.isEmpty(data)) {
+      if (_.isEmpty(data)) {
        return Promise.reject('No description found for "' + tableName + '" table. Check the table name and schema; remember, they _are_ case sensitive.');
      } else {
        return Promise.resolve(data);
@@ -544,7 +544,7 @@ class QueryInterface {
    const attributes = {};
    options = options || {};
-    if (Utils._.values(DataTypes).indexOf(dataTypeOrOptions) > -1) {
+    if (_.values(DataTypes).indexOf(dataTypeOrOptions) > -1) {
      attributes[attributeName] = { type: dataTypeOrOptions, allowNull: true };
    } else {
      attributes[attributeName] = dataTypeOrOptions;
@@ -675,11 +675,11 @@ class QueryInterface {
      const result = {};
      tableNames.forEach((tableName, i) => {
-        if (Utils._.isObject(tableName)) {
+        if (_.isObject(tableName)) {
          tableName = tableName.schema + '.' + tableName.tableName;
        }
-        result[tableName] = Utils._.compact(results[i]).map(r => r.constraint_name);
+        result[tableName] = _.compact(results[i]).map(r => r.constraint_name);
      });
      return result;
@@ -848,20 +848,20 @@ class QueryInterface {
    options = _.clone(options);
-    if (!Utils._.isEmpty(where)) {
+    if (!_.isEmpty(where)) {
      wheres.push(where);
    }
    // Lets combine uniquekeys and indexes into one
-    indexes = Utils._.map(model.options.uniqueKeys, value => {
+    indexes = _.map(model.options.uniqueKeys, value => {
      return value.fields;
    });
-    Utils._.each(model.options.indexes, value => {
+    _.each(model.options.indexes, value => {
      if (value.unique) {
        // fields in the index may both the strings or objects with an attribute property - lets sanitize that
-        indexFields = Utils._.map(value.fields, field => {
+        indexFields = _.map(value.fields, field => {
-          if (Utils._.isPlainObject(field)) {
+          if (_.isPlainObject(field)) {
            return field.attribute;
          }
          return field;
@@ -871,7 +871,7 @@ class QueryInterface {
    });
    for (const index of indexes) {
-      if (Utils._.intersection(attributes, index).length === index.length) {
+      if (_.intersection(attributes, index).length === index.length) {
        where = {};
        for (const field of index) {
          where[field] = valuesByField[field];
@@ -941,8 +941,8 @@ class QueryInterface {
    if (typeof identifier === 'object') identifier = Utils.cloneDeep(identifier);
    const sql = this.QueryGenerator.updateQuery(tableName, values, identifier, options, attributes);
-    const table = Utils._.isObject(tableName) ? tableName : { tableName };
+    const table = _.isObject(tableName) ? tableName : { tableName };
-    const model = Utils._.find(this.sequelize.modelManager.models, { tableName: table.tableName });
+    const model = _.find(this.sequelize.modelManager.models, { tableName: table.tableName });
    options.model = model;
    return this.sequelize.query(sql, options);
@@ -1073,7 +1073,7 @@ class QueryInterface {
        } else if (dataType instanceof DataTypes.INTEGER || dataType instanceof DataTypes.BIGINT) {
          result = parseInt(result, 10);
        } else if (dataType instanceof DataTypes.DATE) {
-          if (!Utils._.isNull(result) && !Utils._.isDate(result)) {
+          if (!_.isNull(result) && !_.isDate(result)) {
            result = new Date(result);
          }
        } else if (dataType instanceof DataTypes.STRING) {

--- a/lib/sequelize.js
+++ b/lib/sequelize.js
@@ -142,7 +142,7 @@ class Sequelize {
    Sequelize.runHooks('beforeInit', config, options);
-    this.options = Utils._.extend({
+    this.options = _.extend({
      dialect: null,
      dialectModulePath: null,
      host: 'localhost',
@@ -528,7 +528,7 @@ class Sequelize {
      return options.transaction ? options.transaction.connection : this.connectionManager.getConnection(options);
    }).then(connection => {
      const query = new this.dialect.Query(connection, this, options);
-      const retryOptions = Utils._.extend(this.options.retry, options.retry || {});
+      const retryOptions = _.extend(this.options.retry, options.retry || {});
      return retry(() => query.run(sql, bindParameters), retryOptions)
        .finally(() => {
@@ -558,7 +558,7 @@ class Sequelize {
  set(variables, options) {
    // Prepare options
-    options = Utils._.extend({}, this.options.set, typeof options === 'object' && options || {});
+    options = _.extend({}, this.options.set, typeof options === 'object' && options || {});
    if (this.options.dialect !== 'mysql') {
      throw new Error('sequelize.set is only supported for mysql');
@@ -575,7 +575,7 @@ class Sequelize {
    // Generate SQL Query
    const query =
      'SET '+
-      Utils._.map(variables, (v, k) => '@'+k +' := '+ (typeof v === 'string' ? '"'+v+'"' : v)).join(', ');
+      _.map(variables, (v, k) => '@'+k +' := '+ (typeof v === 'string' ? '"'+v+'"' : v)).join(', ');
    return this.query(query, options);
  }
@@ -663,7 +663,7 @@ class Sequelize {
    options = _.clone(options) || {};
    options.hooks = options.hooks === undefined ? true : !!options.hooks;
-    options = Utils._.defaults(options, this.options.sync, this.options);
+    options = _.defaults(options, this.options.sync, this.options);
    if (options.match) {
      if (!options.match.test(this.config.database)) {
@@ -756,7 +756,7 @@ class Sequelize {
   * @return {Promise}
   */
  authenticate(options) {
-    return this.query('SELECT 1+1 AS result', Utils._.assign({ raw: true, plain: true }, options)).return();
+    return this.query('SELECT 1+1 AS result', _.assign({ raw: true, plain: true }, options)).return();
  }
  databaseVersion(options) {
@@ -1026,9 +1026,9 @@ class Sequelize {
  log() {
    let options;
    let args = Utils.sliceArgs(arguments);
-    const last = Utils._.last(args);
+    const last = _.last(args);
-    if (last && Utils._.isPlainObject(last) && last.hasOwnProperty('logging')) {
+    if (last && _.isPlainObject(last) && last.hasOwnProperty('logging')) {
      options = last;
      // remove options from set of logged arguments if options.logging is equal to console.log
@@ -1080,7 +1080,7 @@ class Sequelize {
    return type;
  }
  normalizeAttribute(attribute) {
-    if (!Utils._.isPlainObject(attribute)) {
+    if (!_.isPlainObject(attribute)) {
      attribute = { type: attribute };
    }

--- a/lib/transaction.js
+++ b/lib/transaction.js
 'use strict';
+const _ = require('lodash');
 const Utils = require('./utils');
 /**
@@ -26,7 +27,7 @@ class Transaction {
    const transactionOptions = sequelize.dialect.supports.transactionOptions || {};
    const generateTransactionId = this.sequelize.dialect.QueryGenerator.generateTransactionId;
-    this.options = Utils._.extend({
+    this.options = _.extend({
      autocommit: transactionOptions.autocommit || null,
      type: sequelize.options.transactionType,
      isolationLevel: sequelize.options.isolationLevel,

--- a/lib/utils.js
+++ b/lib/utils.js
@@ -2,7 +2,7 @@
 const DataTypes = require('./data-types');
 const SqlString = require('./sql-string');
-const _ = require('lodash').runInContext(); // Prevent anyone messing with template settings by creating a fresh copy
+const _ = require('lodash');
 const parameterValidator = require('./utils/parameter-validator');
 const Logger = require('./utils/logger');
 const uuid = require('uuid');
@@ -13,7 +13,6 @@ let inflection = require('inflection');
 const logger = new Logger();
 exports.Promise = Promise;
-exports._ = _;
 exports.debug = logger.debug.bind(logger);
 exports.deprecate = logger.deprecate.bind(logger);
 exports.warn = logger.warn.bind(logger);
@@ -55,7 +54,7 @@ exports.isPrimitive = isPrimitive;
 function mergeDefaults(a, b) {
  return _.mergeWith(a, b, objectValue => {
    // If it's an object, let _ handle it this time, we will be called again for each property
-    if (!this._.isPlainObject(objectValue) && objectValue !== undefined) {
+    if (!_.isPlainObject(objectValue) && objectValue !== undefined) {
      return objectValue;
    }
  });

--- a/test/support.js
+++ b/test/support.js
@@ -67,7 +67,7 @@ const Support = {
          resolve();
        }
      }).then(() => {
-        const options = Sequelize.Utils._.extend({}, sequelize.options, { storage: p }),
+        const options = _.extend({}, sequelize.options, { storage: p }),
          _sequelize = new Sequelize(sequelize.config.database, null, null, options);
        if (callback) {

--- a/test/unit/associations/belongs-to-many.test.js
+++ b/test/unit/associations/belongs-to-many.test.js
@@ -4,6 +4,7 @@ const chai = require('chai');
 const sinon = require('sinon');
 const expect = chai.expect;
 const stub = sinon.stub;
+const _ = require('lodash');
 const Support = require(__dirname + '/../support');
 const DataTypes = require(__dirname + '/../../../lib/data-types');
 const BelongsTo = require(__dirname + '/../../../lib/associations/belongs-to');
@@ -72,7 +73,7 @@ describe(Support.getTestDialectTeaser('belongsToMany'), () => {
    const User = current.define('User');
    const Task = current.define('Task');
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      User.prototype[method] = function() {
        const realMethod = this.constructor.associations.task[alias];
        expect(realMethod).to.be.a('function');
@@ -84,7 +85,7 @@ describe(Support.getTestDialectTeaser('belongsToMany'), () => {
    const user = User.build();
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      expect(user[method]()).to.be.a('function');
    });
  });

--- a/test/unit/associations/belongs-to.test.js
+++ b/test/unit/associations/belongs-to.test.js
@@ -2,6 +2,7 @@
 const chai = require('chai'),
  expect = chai.expect,
+  _         = require('lodash'),
  Support   = require(__dirname + '/../support'),
  current   = Support.sequelize;
@@ -15,7 +16,7 @@ describe(Support.getTestDialectTeaser('belongsTo'), () => {
    const User = current.define('User');
    const Task = current.define('Task');
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      User.prototype[method] = function() {
        const realMethod = this.constructor.associations.task[alias];
        expect(realMethod).to.be.a('function');
@@ -27,7 +28,7 @@ describe(Support.getTestDialectTeaser('belongsTo'), () => {
    const user = User.build();
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      expect(user[method]()).to.be.a('function');
    });
  });

--- a/test/unit/associations/has-many.test.js
+++ b/test/unit/associations/has-many.test.js
@@ -4,6 +4,7 @@ const chai = require('chai'),
  sinon = require('sinon'),
  expect = chai.expect,
  stub = sinon.stub,
+  _         = require('lodash'),
  Support   = require(__dirname + '/../support'),
  DataTypes = require(__dirname + '/../../../lib/data-types'),
  HasMany   = require(__dirname + '/../../../lib/associations/has-many'),
@@ -98,7 +99,7 @@ describe(Support.getTestDialectTeaser('hasMany'), () => {
        createTask: 'create'
      };
-      current.Utils._.each(methods, (alias, method) => {
+      _.each(methods, (alias, method) => {
        User.prototype[method] = function() {
          const realMethod = this.constructor.associations.task[alias];
          expect(realMethod).to.be.a('function');
@@ -110,7 +111,7 @@ describe(Support.getTestDialectTeaser('hasMany'), () => {
      const user = User.build();
-      current.Utils._.each(methods, (alias, method) => {
+      _.each(methods, (alias, method) => {
        expect(user[method]()).to.be.a('function');
      });
    });

--- a/test/unit/associations/has-one.test.js
+++ b/test/unit/associations/has-one.test.js
@@ -2,6 +2,7 @@
 const chai = require('chai'),
  expect = chai.expect,
+  _         = require('lodash'),
  Support   = require(__dirname + '/../support'),
  DataTypes = require(__dirname + '/../../../lib/data-types'),
  current   = Support.sequelize;
@@ -27,7 +28,7 @@ describe(Support.getTestDialectTeaser('hasOne'), () => {
    const User = current.define('User');
    const Task = current.define('Task');
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      User.prototype[method] = function() {
        const realMethod = this.constructor.associations.task[alias];
        expect(realMethod).to.be.a('function');
@@ -39,7 +40,7 @@ describe(Support.getTestDialectTeaser('hasOne'), () => {
    const user = User.build();
-    current.Utils._.each(methods, (alias, method) => {
+    _.each(methods, (alias, method) => {
      expect(user[method]()).to.be.a('function');
    });
  });

--- a/test/unit/sql/create-table.test.js
+++ b/test/unit/sql/create-table.test.js
@@ -7,7 +7,6 @@ const Support   = require(__dirname + '/../support'),
  sql       = current.dialect.QueryGenerator,
  _         = require('lodash');
 describe(Support.getTestDialectTeaser('SQL'), () => {
  describe('createTable', () => {
    const FooUser = current.define('user', {
@@ -49,6 +48,31 @@ describe(Support.getTestDialectTeaser('SQL'), () => {
          });
        });
      });
+      describe('Attempt to use different lodash template settings', () => {
+        before(() => {
+          // make handlebars
+          _.templateSettings.evaluate = /{{([\s\S]+?)}}/g;
+          _.templateSettings.interpolate = /{{=([\s\S]+?)}}/g;
+          _.templateSettings.escape = /{{-([\s\S]+?)}}/g;
+        });
+        after(() => {
+          // reset
+          const __ = require('lodash').runInContext();
+          _.templateSettings.evaluate = __.templateSettings.evaluate;
+          _.templateSettings.interpolate = __.templateSettings.interpolate;
+          _.templateSettings.escape = __.templateSettings.escape;
+        });
+        it('it should be a okay!', () => {
+          expectsql(sql.createTableQuery(FooUser.getTableName(), sql.attributesToSQL(FooUser.rawAttributes), {
+            comment: 'This is a test of the lodash template settings.'
+          }), {
+            postgres: 'CREATE TABLE IF NOT EXISTS "foo"."users" ("id"   SERIAL , "mood" "foo"."enum_users_mood", PRIMARY KEY ("id")); COMMENT ON TABLE "foo"."users" IS \'This is a test of the lodash template settings.\';'
+          });
+        });
+      });
    }
  });
 });