在CakePHP中添加朋友功能 [英] Add a friend feature in CakePHP

问题描述

我需要一个简单的添加朋友功能在我的应用程序，通过一些研究，我需要一个连接表链接回用户表？像这样：（我已经有一个users表）

I need a simple add a friend feature in my application, through some research, I would need a join table linking back to users table ? something like this: (I already have a users table)

Users-Friendships-用户

Users-Friendships-Users

任何人都可以提供更多详细信息？

Can anyone give more details about this?

推荐答案

友谊表应该有以下列：

id Integer
user_from (the user who requested friendship)
user_to (the user who accepted friendship)
created (optional to track when your friendship started)

然后您需要创建正确的模型关系。

Then you need to create proper Model relation.

class User extends AppModel {
   ...
   var $hasMany = array(
      'UserFrom'=>array(
         'className'=>'Friendship',
         'foreignKey'=>'user_from'
      ),
      'UserTo'=>array(
         'className'=>'Friendship',
         'foreignKey'=>'user_to'
      )
   );
   var $hasAndBelongsToMany = array(
      'Friendship' => array(
          'className' => 'User',
          'joinTable' => 'friendships',
          'foreignKey' => 'user_from',
          'associationForeignKey' => 'user_to'
   );
   ...
}

class Friendship extends AppModel {
   ...
   var $belongsTo = array(
      'UserFrom'=>array(
         'className'=>'User',
         'foreignKey'=>'user_from'
      ),
      'UserTo'=>array(
         'className'=>'User',
         'foreignKey'=>'user_to'
      )
   )
   ...
}

这样你就可以在每个模型中定义2个关系，你可以添加HABTM关系。运行bake脚本来构建你的控制器和视图，然后在你的代码中可以使用这样： / p>

This way you are defining 2 relation in each model. You can add HABTM relation too. Run bake script to build your controllers and views. Then in your code you can use something like this:

$this->User->UserFrom->find('all', 
    array(
        'conditions'=>array('user_from'=>1), 
        'contain'=>array('UserTo')
    )
);

这应该会返回ID为1的用户的朋友和所有朋友的详细信息。

This should return friends of user with ID 1 and all friends details.

小心递归查询。 ：）

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