public function isFavorited($user_id = null)
	{
		return $this->favorites()->where('user_id', ($user_id) ? $user_id : Auth::id())->exists();
	}
public function isFavorited($user_id = null)
	{
		return $this->favorites()->where('user_id', ($user_id) ? $user_id : Auth::id())->exists();
	}
public function isFavorited ( $ user_id = null ) { return $ this -> favorites ( ) -> where ( 'user_id' , ( $ user_id ) ? $ user_id : Auth :: id ( ) ) -> exists ( ) ; }
Check if the user has favorited this Object

@param  int $user_id  [if  null its added to the auth user]
@return boolean
Check if the user has favorited this Object