Apply type validation to all dialects. Thanks to @fixe

changelog.md

 # NEXT
 - [FIXED] Fix findOrCreate regression trying to add a transaction even if there is none
+- [FEATURE] Added default validation based on attribute types. [#3472](https://github.com/sequelize/sequelize/pull/3472). The validation _cannot_ be disabled. If you really want to completely disable it, you can remove the `validate` function from the corresponding datatype, but know that this permanently disables the validation.
 
 # 3.4.1
 - [FIXED] Fix belongs-to-many `countAssociations` - ambigious id when through model has id

lib/data-types.js

@@ -84,6 +84,11 @@ STRING.prototype.toSql = function() {
 };
 STRING.prototype.validate = function(value) {
   if (typeof value !== 'string') {
+    if (this.options.binary) {
+      if (Buffer.isBuffer(value)) {
+        return true;
+      }
+    }
     throw new sequelizeErrors.ValidationError(util.format('%j is not a valid string', value));
   }
 

lib/dialects/abstract/query-generator.js

@@ -268,7 +268,6 @@ var QueryGenerator = {
     }
 
     valueHash = Utils.removeNullValuesFromHash(valueHash, this.options.omitNull);
-
     for (key in valueHash) {
       if (valueHash.hasOwnProperty(key)) {
         value = valueHash[key];
@@ -894,6 +893,11 @@ var QueryGenerator = {
     if (value && value._isSequelizeMethod) {
       return this.handleSequelizeMethod(value);
     } else {
+      if (field && field.type && value) {
+        if (field.type.validate) {
+          field.type.validate(value);
+        }
+      }
       return SqlString.escape(value, false, this.options.timezone, this.dialect, field);
     }
   },

lib/dialects/mysql/query-generator.js

@@ -358,6 +358,11 @@ var QueryGenerator = {
     } else if (value && field && field.type instanceof DataTypes.GEOMETRY) {
       return 'GeomFromText(\'' + Wkt.stringify(value) + '\')';
     } else {
+      if (field && field.type && value) {
+        if (field.type.validate) {
+          field.type.validate(value);
+        }
+      }
       return SqlString.escape(value, false, this.options.timezone, this.dialect, field);
     }
   },
@@ -387,7 +392,7 @@ var QueryGenerator = {
 
   geometrySelect: function(column) {
     return 'AsText(' + this.quoteIdentifiers(column) + ') AS ' + column;
-  }  
+  }
 };
 
 module.exports = Utils._.extend(Utils._.clone(require('../abstract/query-generator')), QueryGenerator);

lib/dialects/sqlite/query-generator.js

@@ -131,6 +131,7 @@ var QueryGenerator = {
 
   upsertQuery: function (tableName, insertValues, updateValues, where, rawAttributes, options) {
     options.ignore = true;
+
     var sql = this.insertQuery(tableName, insertValues, rawAttributes, options) + ' ' + this.updateQuery(tableName, updateValues, where, options, rawAttributes);
 
     return sql;

lib/query-interface.js

@@ -410,7 +410,7 @@ QueryInterface.prototype.renameColumn = function(tableName, attrNameBefore, attr
 
     _options[attrNameAfter] = {
       attribute: attrNameAfter,
-      type: DataTypes[data.type],
+      type: data.type,
       allowNull: data.allowNull,
       defaultValue: data.defaultValue
     };

test/integration/instance.validations.test.js

@@ -495,25 +495,6 @@ describe(Support.getTestDialectTeaser('InstanceValidator'), function() {
     });
   });
 
-  it('skips validation when asked', function() {
-    var values = ['value1', 'value2'];
-    var Bar = this.sequelize.define('Bar' + config.rand(), {
-      field: {
-        type: Sequelize.ENUM,
-        values: values,
-        validate: {
-          isIn: [values]
-        }
-      }
-    });
-
-    return Bar.sync({force: true}).then(function() {
-      return Bar.create({ field: 'value3' }, {validate: false})
-        .catch(Sequelize.DatabaseError, function() {
-        });
-    });
-  });
-
   it('raises an error if saving a different value into an immutable field', function() {
     var User = this.sequelize.define('User', {
       name: {

test/unit/model/validation.test.js

@@ -6,6 +6,7 @@ var chai = require('chai')
   , expect = chai.expect
   , Sequelize = require(__dirname + '/../../../index')
   , Support = require(__dirname + '/../support')
+  , current = Support.sequelize
   , config = require(__dirname + '/../../config/config');
 
 describe(Support.getTestDialectTeaser('InstanceValidator'), function() {
@@ -263,4 +264,41 @@ describe(Support.getTestDialectTeaser('InstanceValidator'), function() {
         }
       }
   });
+
+  describe('datatype validations', function () {
+    describe.only('should throw validationerror', function () {
+      var User = current.define('user', {
+        age: Sequelize.INTEGER
+      });
+
+      describe('create', function () {
+        it('should throw when passing string', function () {
+          return expect(User.create({
+            age: 'jan'
+          })).to.be.rejectedWith(current.ValidationError);
+        });
+
+        it('should throw when passing decimal', function () {
+          return expect(User.create({
+            age: 4.5
+          })).to.be.rejectedWith(current.ValidationError);
+        });
+      });
+
+      describe('update', function () {
+        it('should throw when passing string', function () {
+          return expect(User.update({
+            age: 'jan'
+          }, { where : {}})).to.be.rejectedWith(current.ValidationError);
+        });
+
+        it('should throw when passing decimal', function () {
+          return expect(User.update({
+            age: 4.5
+          }, { where : {}})).to.be.rejectedWith(current.ValidationError);
+        });
+      });
+
+    });
+  });
 });