我正在扩展rainlab.user
插件以允许每个用户通过具有以下字段的简单中间表来拥有朋友:
user_id
friend_id
status
我扩展了User
模型:
use RainLab\User\Models\User as FrontUser;
FrontUser::extend(function($model) {
$model->belongsToMany['friends']=[
'RainLab\User\Models\User',
'table' => 'meysam_social_friends',
'pivot' => ['status'],
'pivotModel' => 'Meysam\Social\Models\FriendsPivot',
'timestamps' => true,
'key' => 'user_id',
'otherKey' => 'friend_id'
];
$model->addDynamicMethod('isFriendWith', function (FrontUser $user) use ($model) {
$model->friends->contains($user->id);
});
$model->addDynamicMethod('addFriend', function (FrontUser $user) use ($model) {
$model->friends()->attach($user->id);
});
$model->addDynamicMethod('removeFriend', function (FrontUser $user) use ($model) {
$model->friends()->detach($user->id);
});
});
并且还扩展了Rainlab.User Controller
选项Friends
卡,其中列出了用户的所有朋友并且可以添加和删除:
use RainLab\User\Controllers\Users as UsersController;
UsersController::extend(function($controller) {
if(!isset($controller->implement['Backend.Behaviors.RelationController'])) {
$controller->implement[] = 'Backend.Behaviors.RelationController';
}
$controller->relationConfig = '$/meysam/social/controllers/user/config_relations.yaml';
});
UsersController::extendFormFields(function($form, $model, $context) {
if(!$model instanceof FrontUser or $context != 'preview'){
// friends tab should not be displayed in update and create contexts
return;
}
$form->addTabFields([
'friends' => [
'label' => '',
'tab' => 'Friends',
'type' => 'partial',
'path' => '$/meysam/social/controllers/user/_friends.htm',
]
]);
});
现在我需要保持双向的友谊关系。即每当user_id
andfriend_id
被添加到friends
表中时,我也想自动将friend_id
and添加user_id
到表中。为了实现这一点,我afterSave
在beforeSave
模型中实现了FriendsPivot
:
class FriendsPivot extends Pivot
{
/*
* Validation
*/
public $rules = [
'status' => 'required'
];
public $belongsTo = [
'user' => ['RainLab\User\Models\User', 'key' => 'user_id'],
'friend' => ['RainLab\User\Models\User', 'key' => 'friend_id']
];
public function getStatusOptions()
{
return [
1 => 'Pending',
2 => 'Approved',
3 => 'Blocked',
];
}
public function afterSave()
{
Log::info('Saving pivot...');
if(!$this->friend->isFriendWith($this->user)) {
$this->friend->addFriend($this->user);
}
}
public function beforeDelete()
{
Log::info('Deleting pivot...');
if($this->friend->isFriendWith($this->user)) {
$this->friend->removeFriend($this->user);
}
}
}
问题是beforeDelete
从未调用过。afterSave
被调用但从beforeDelete
未被调用,因此关系的逆向不会被删除(user_id
-friend_id
从数据库中删除但friend_id
-user_id
不会被删除)。为什么beforeDelete
不叫?有什么我做错了吗?有没有更好的方法来维持双向的友谊关系?