Here’s my function :
public function associateUserToProject($user) {
        
        $sql = "INSERT INTO tbl_project_user_assignment (project_id,user_id) VALUES (:projectId, :userId)";
        $command = Yii::app()->db->createCommand($sql);
        $command->bindValue(":projectId", $this->id, PDO::PARAM_INT);
        $command->bindValue(":userId", $user->id, PDO::PARAM_INT);
        return $command->execute();
   
    }
And the error:
CDbException: CDbCommand failed to execute the SQL statement: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘=‘1’ AND user_id=‘1’’ at line 1