refactor(model/find): find now relies on findAll for the heavy lifting

lib/model.js

@@ -729,94 +729,31 @@ module.exports = (function() {
   *
   * @see {Model#findAll}           for an explanation of options and queryOptions
   * @return {Promise<Instance>}
+  * @alias find
   */
-  Model.prototype.find = function(options, queryOptions) {
-    var hasJoin = false;
-
-    // no options defined?
-    // return an emitter which emits null
-    if ([null, undefined].indexOf(options) !== -1) {
+  Model.prototype.findOne = function(param, queryOptions) {
+    // For sanity findOne will never return if no options are passed
+    if ([null, undefined].indexOf(param) !== -1) {
       return Promise.resolve(null);
     }
 
-    var where
-      , primaryKeys = this.primaryKeys
-      , keys = Object.keys(primaryKeys)
-      , keysLength = keys.length
-      , tableNames = { };
-
-    tableNames[this.getTableName()] = true;
-
-    // options is not a hash but an id
-    if (typeof options === 'number') {
-      var oldOption = options;
-      options = { where: {} };
-      if (keysLength === 1) {
-        options.where[keys[0]] = oldOption;
-      } else {
-        options.where.id = oldOption;
-      }
-    } else if (Utils._.size(primaryKeys) && Utils.argsArePrimaryKeys(arguments, primaryKeys)) {
-      where = {};
-
-      Utils._.each(arguments, function(arg, i) {
-        var key = keys[i];
-        where[key] = arg;
-      });
-
-      options = { where: where };
-    } else if (typeof options === 'string' && parseInt(options, 10).toString() === options) {
-      var parsedId = parseInt(options, 10);
-
-      if (!Utils._.isFinite(parsedId)) {
-        throw new Error('Invalid argument to find(). Must be an id or an options object.');
-      }
-
-      options = { where: parsedId };
-    } else if (typeof options === 'object') {
-      options = Utils._.clone(options, function(thing) {
-        if (Buffer.isBuffer(thing)) { return thing; }
-        return undefined;
-      });
-
-      if (options.hasOwnProperty('include') && options.include) {
-        hasJoin = true;
-
-        validateIncludedElements.call(this, options, tableNames);
-      }
-
-      // whereCollection is used for non-primary key updates
-      this.options.whereCollection = options.where || null;
-    } else if (typeof options === 'string') {
-      where = {};
-
-      if (this.primaryKeyCount === 1) {
-        where[primaryKeys[keys[0]]] = options;
-        options = where;
-      } else if (this.primaryKeyCount < 1) {
-        // Revert to default behavior which is {where: [int]}
-        options = {where: parseInt(Number(options) || 0, 0)};
-      }
-    }
-
-    if (options.attributes === undefined) {
-      options.attributes = Object.keys(this.tableAttributes);
+    var options = {};
+    if (typeof param === 'number' || typeof param === 'string') {
+      options.where = {};
+      options.where[this.primaryKeyAttribute] = param;
+    } else {
+      options = optClone(param);
     }
 
     if (options.limit === undefined && !(options.where && options.where[this.primaryKeyAttribute])) {
       options.limit = 1;
     }
 
-    mapFieldNames.call(this, options, this);
-    options = paranoidClause.call(this, options);
-
-    return this.QueryInterface.select(this, this.getTableName(), options, Utils._.defaults({
-      plain: true,
-      type: QueryTypes.SELECT,
-      hasJoin: hasJoin,
-      tableNames: Object.keys(tableNames)
-    }, queryOptions, { transaction: (options || {}).transaction }));
+    return this.findAll(options, Utils._.defaults({
+      plain: true
+    }, queryOptions || {}));
   };
+  Model.prototype.find = Model.prototype.findOne;
 
   /**
    * Run an aggregation method on the specified field

test/dao-factory/find.test.js

@@ -40,8 +40,12 @@ describe(Support.getTestDialectTeaser("DAOFactory"), function () {
         User.sync({ force: true }).success(function() {
           sequelize.transaction().then(function(t) {
             User.create({ username: 'foo' }, { transaction: t }).success(function() {
-              User.find({ username: 'foo' }).success(function(user1) {
-                User.find({ username: 'foo' }, { transaction: t }).success(function(user2) {
+              User.find({
+                where: { username: 'foo' }
+              }).success(function(user1) {
+                User.find({
+                  where: { username: 'foo' },
+                }, { transaction: t }).success(function(user2) {
                   expect(user1).to.be.null
                   expect(user2).to.not.be.null