🐛 (unique constraint violation) Check for model and unique keys being define…

…d in unique constraint parsing

changelog.md

 # Next
 - [FEATURE] Geometry support for postgres
 - [BUG] Fix wrong count for `findAndCountAll` with required includes [#4016](https://github.com/sequelize/sequelize/pull/4016)
+- [BUG] Fix problems related to parsing of unique constraint errors [#4017](https://github.com/sequelize/sequelize/issues/4017) and [#4012](https://github.com/sequelize/sequelize/issues/4012)
 
 # 3.3.2
 - [FIXED] upsert no longer updates with default values each time [#3994](https://github.com/sequelize/sequelize/pull/3994)

lib/dialects/abstract/query.js

@@ -417,13 +417,16 @@ AbstractQuery.prototype.findTableNameInAttribute = function(attribute) {
 AbstractQuery.prototype.getUniqueConstraintErrorMessage = function(field) {
   var message = field + ' must be unique';
   var self = this;
-  Object.keys(self.model.uniqueKeys).forEach(function(key) {
-    if (self.model.uniqueKeys[key].fields.indexOf(field.replace(/"/g, '')) >= 0) {
-      if (self.model.uniqueKeys[key].hasOwnProperty('msg')) {
-        message = self.model.uniqueKeys[key].msg;
+
+  if (self.model) {
+    Object.keys(self.model.uniqueKeys).forEach(function(key) {
+      if (self.model.uniqueKeys[key].fields.indexOf(field.replace(/"/g, '')) >= 0) {
+        if (self.model.uniqueKeys[key].hasOwnProperty('msg')) {
+          message = self.model.uniqueKeys[key].msg;
+        }
       }
-    }
-  });
+    });
+  }
   return message;
 };
 

lib/dialects/mssql/query.js

@@ -172,9 +172,11 @@ Query.prototype.formatError = function (err) {
   if (match && match.length > 1) {
     var fields = {}
       , message = 'Validation error'
-      , uniqueKey = this.model.uniqueKeys[match[1]];
+      , uniqueKey = this.model && this.model.uniqueKeys[match[1]];
 
-    if (!!uniqueKey.msg) message = uniqueKey.msg;
+    if (uniqueKey && !!uniqueKey.msg) {
+      message = uniqueKey.msg;
+    }
     if (!!match[2]) {
       var values = match[2].split(',').map(Function.prototype.call, String.prototype.trim);
       if (!!uniqueKey) {

test/integration/error.test.js

@@ -220,5 +220,29 @@ describe(Support.getTestDialectTeaser('Sequelize Errors'), function () {
         expect(spy).to.have.been.calledOnce;
       });
     });
+
+    it('Works when unique keys are not defined in sequelize', function () {
+      var User = this.sequelize.define('user', {
+        name: {
+          type: Sequelize.STRING,
+          unique: 'unique \n unique',
+        }
+      }, { timestamps: false });
+
+      return this.sequelize.sync({ force: true }).bind(this).then(function () {
+        // Now let's pretend the index was created by someone else, and sequelize doesn't know about it
+        User = this.sequelize.define('user', {
+          name: Sequelize.STRING
+        }, { timestamps: false });
+
+        return User.create({ name: 'jan' });
+      }).then(function () {
+        // It should work even though the unique key is not defined in the model
+        return expect(User.create({ name: 'jan' })).to.be.rejectedWith(this.sequelize.UniqueConstraintError);
+      }).then(function () {
+        // And when the model is not passed at all
+        return expect(this.sequelize.query('INSERT INTO users (name) VALUES (\'jan\')')).to.be.rejectedWith(this.sequelize.UniqueConstraintError);
+      });
+    });
   });
 });