「NOT IN」 的Kohana ORM

Question

我有以下型號：

class Model_User extends ORM { 

    protected $_primary_key = 'name'; 

    protected $_has_many = array(
     'repositories' => array(
      'model' => 'repository', 
      'through' => 'repository_user', 
     ), 
    ); 
} 

class Model_Repository extends ORM { 

    protected $_primary_key = 'name'; 

    protected $_has_many = array(
     'users' => array(
      'model' => 'user', 
      'through' => 'repository_user', 
     ), 
    ); 
} 

我用下面的代碼來獲取未連接到存儲庫的所有用戶：

$repository = ORM::factory('repository', $this->request->param('svn_name')); 
$users = ORM::factory('user')->where('name', 'NOT IN', $repository->users->find_all()->as_array()) 
      ->find_all(); 

不幸的是我收到以下錯誤消息，如果沒有用戶連接到特定的資源庫：

Database_Exception [ 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  
')' at line 1 [ SELECT `user`.* FROM `users` AS `user` WHERE `name` NOT IN() ] 

我怎樣才能解決這個問題，而無需使用如果只是使用Kohana-Methods？

Answer 1

問題是$repository->users->find_all()->as_array()返回一個空數組，因此您的SQL查詢無效（NOT IN() - >語法無效）。
在應用條件之前，您應該檢查陣列是否爲空：

$repository = ORM::factory('repository', $this->request->param('svn_name')); 
$names = $repository->users->find_all()->as_array(); 
$users = ORM::factory('user'); 

// Check against empty names 
if (!empty($names)) 
{ 
    $users->where('name', 'NOT IN', $names); 
} 

// Execute the query 
$users->find_all();