fix(associations): regression in hasMany pairing introduced with through scopes, fixes #2316

lib/associations/has-many.js

@@ -106,10 +106,10 @@ module.exports = (function() {
           }
           // If through is not default, determine pairing by through value (model/string)
           else {
-            paired = self.options.through === association.options.through ||
-                     self.options.through === (association.options.through && association.options.through.model) ||
-                     (self.options.through && self.options.through.model) === (association.options.through && association.options.through.model) ||
-                     (self.options.through && self.options.through.model) === association.options.through;
+            paired = (self.options.through === association.options.through) ||
+                     (self.options.through === association.options.through.model) ||
+                     (self.options.through.model && association.options.through.model && (self.options.through.model === association.options.through.model)) ||
+                     (self.options.through.model === association.options.through);
           }
           // If paired, set properties identifying both associations as double linked, and allow them to each eachtoerh
           if (paired) {
@@ -294,7 +294,6 @@ module.exports = (function() {
       if (this.targetAssociation.foreignIdentifier) {
         this.targetAssociation.foreignIdentifierField = this.through.model.rawAttributes[this.targetAssociation.foreignIdentifier].field || this.targetAssociation.foreignIdentifier;
       }
-
       this.through.model.init(this.through.model.daoFactoryManager);
     } else {
       var newAttributes = {};

test/associations/has-many.test.js

@@ -2089,16 +2089,20 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
 
       describe('project has owners and users and owners and users have projects', function() {
         beforeEach(function() {
-          
           this.Project.hasMany(this.User, { as: 'owners', through: 'projectOwners'});
           this.Project.hasMany(this.User, { as: 'users', through: 'projectUsers'});
 
-          this.User.hasMany(this.Project, { as: 'owners', through: 'projectOwners'});
-          this.User.hasMany(this.User, { as: 'users', through: 'projectUsers'});
+          this.User.hasMany(this.Project, { as: 'ownedProjects', through: 'projectOwners'});
+          this.User.hasMany(this.Project, { as: 'memberProjects', through: 'projectUsers'});
 
           return this.sequelize.sync({ force: true });
         });
 
+        it('correctly pairs associations', function () {
+          expect(this.Project.associations.owners.targetAssociation).to.equal(this.User.associations.ownedProjects);
+          expect(this.Project.associations.users.targetAssociation).to.equal(this.User.associations.memberProjects);
+        });
+
         it('correctly sets user and owner', function() {
           var self = this;