Add group - course entity connection

app/Migrations/Schema/V200/Version20.php

@@ -584,6 +584,8 @@ class Version20 extends AbstractMigrationChamilo
         if (!$table->hasColumn('author_id')) {
             $this->addSql('ALTER TABLE usergroup ADD author_id INT DEFAULT NULL');
         }
+
+        $this->addSql('ALTER TABLE c_group_info ADD CONSTRAINT FK_CE06532491D79BD3 FOREIGN KEY (c_id) REFERENCES course (id);');
     }
 
     /**

src/CoreBundle/Entity/Course.php

@@ -546,7 +546,7 @@ class Course
     public function hasTeacher(User $user)
     {
         $criteria = Criteria::create()->where(
-            Criteria::expr()->eq("user", $user)
+            Criteria::expr()->eq('user', $user)
         );
 
         return $this->getTeachers()->matching($criteria)->count() > 0;
@@ -559,9 +559,9 @@ class Course
      */
     public function hasGroup(CGroupInfo $group)
     {
-        $criteria = Criteria::create()->where(
-            Criteria::expr()->eq("groups", $group)
-        );
+        /*$criteria = Criteria::create()->where(
+            Criteria::expr()->eq('groups', $group)
+        );*/
 
         return $this->getGroups()->contains($group);
     }