PHP-ActiveRecord的 - 關係的has_many

Question

我想這樣做對我的看法（用戶，組，users_groups），但it's不工作：

<?php echo $user->group->name;?> 

我有3個表

- users (id, name) 
- groups (id, name) 
- users_groups (id, user_id, group_id) 

我有2個型號

class User extends ActiveRecord\Model 
{ 
    static $belongs_to = array(
     array('group', 'through' => 'users_groups') 
    ); 
} 

class Group extends ActiveRecord\Model 
{ 
    static $has_many = array(
     array('users' , 'through' => 'users_groups') 
    ); 
} 

我的模特兒有錯或錯過什麼？我需要另一個模型users_groups？如果是的話，會怎麼樣呢？

我需要幫助，我找不到正確的方法。

謝謝！

Answer 1

解決的辦法是：

class User extends ActiveRecord\Model 
{ 
    static $has_many = array(
    array('groups', 'through' => 'usersgroups', 'order'=>'id asc'), 
     array('usersgroups') 
    ); 
} 


class Group extends ActiveRecord\Model 
{ 
    static $has_many = array(
     array('users' , 'through' => 'usersgroups'), 
     array('usersgroups') 
    ); 
} 

class UsersGroup extends ActiveRecord\Model 
{ 
    static $table_name = 'users_groups'; 

    static $belongs_to = array(
     array('user'), 
     array('group') 
    ); 
} 

的問題是與第三模型（奇異UsersGroup）

Answer 2

class User extends ActiveRecord\Model 
{ 
    function get_group($user_id){ 
     $query = "SELECT name FROM groups 
        LEFT JOIN users_groups ON (groups.id=users_groups.group_id) 
        LEFT JOIN users ON (users_groups.user_id=users.id)"; 
     $this->group = mysql_fetch_object($query); 
    } 
} 

添加此功能，您的用戶功能

Answer 3

我想回答你的問題是在manual。這是您嘗試實施的多對多關聯的一個示例。在這種情況下，組是訂單，users_groups是支付。

class Order extends ActiveRecord\Model { 
    static $has_many = array(
    array('payments'), 
    array('users', 'through' => 'payments') 
    ); 
} 

class Payment extends ActiveRecord\Model { 
    static $belongs_to = array(
    array('user'), 
    array('order') 
    ); 
} 

class User extends ActiveRecord\Model { 
    static $has_many = array(
    array('payments') 
    ); 
} 

$order = Order::first(); 
# direct access to users 
print_r($order->users); # will print an array of User object