Utils.toDefaultValue - clone value for objects and strings to prevent mutating it

lib/utils.js

@@ -232,6 +232,8 @@ var Utils = module.exports = {
       return uuid.v4();
       return uuid.v4();
     } else if (value instanceof DataTypes.NOW) {
     } else if (value instanceof DataTypes.NOW) {
       return Utils.now();
       return Utils.now();
+    } else if(_.isPlainObject(value) || _.isArray(value)) {
+      return _.clone(value);
     } else {
     } else {
       return value;
       return value;
     }
     }

test/unit/instance/set.test.js

@@ -28,6 +28,21 @@ describe(Support.getTestDialectTeaser('Instance'), function() {
       expect(user.dataValues['meta.location']).not.to.be.ok;
       expect(user.dataValues['meta.location']).not.to.be.ok;
       expect(user.get('meta').location).to.equal('Copenhagen');
       expect(user.get('meta').location).to.equal('Copenhagen');
       expect(user.get('meta') === meta).to.equal(true);
       expect(user.get('meta') === meta).to.equal(true);
+      expect(user.get('meta') === meta).to.equal(true);
+    });
+
+    it('doesnt mutate the JSONB defaultValue', function() {
+      var User = current.define('User', {
+        meta: {
+          type: DataTypes.JSONB,
+          allowNull: false,
+          defaultValue: {}
+        }
+      });
+      var user1 = User.build({});
+      user1.set('meta.location', 'Stockhollm');
+      var user2 = User.build({});
+      expect(user2.get('meta')).to.deep.equal({});
     });
     });
   });
   });
-});
+});
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