Select com inner join, CakePHP

public function initialize()
       {

           $posts = $this->Posts->find("all",array(
              "joins" => array(
                  array(
                    "table" => "users",
                    "alias" => "User",
                    "type" => "INNER",
                    "conditions" => array("Post.user_id = User.id "),
                    "fields" => array('Post.*', 'User.username')
                   )
               )
            )
         );

public function initialize(array $config) {
		$this->addBehavior('Timestamp');
		$this->displayField('title');
		$this->belongsTo('User'); //belongsTo que é a associação que estou fazendo entre o cake e o join;
	}

<?= $post->username ?>

<?= $post->user->username ?>

SELECT posts.*, users.username
FROM posts
  inner join users on (posts.user_id = users.id )