Laravel 使用3张表格，让你的演讲更具说服力

我的应用程序有3个相互关联的表：用户、订阅者、订阅者令牌

users:
id   | name    | username
56   | Ngoni   | ngoni

subscribers:
id  | user_id   | client_id 
1   |    30     | 2
16  |    56     | 2

subscriber_tokens:
id | token        | user_id  | client_id  
1  | e7ij3l00J... |    56    |     2

我已将我的关系定义如下：

User.php

Model

public function subscribers()
{
    return $this->hasMany('App\Models\Subscriber', 'client_id', 'id');
}

public function subscriber()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

public function user()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

SubscriberToken.php

Model

public function subscribers()
{
    return $this->hasMany('App\Models\Subscriber', 'client_id', 'id');
}

public function subscriber()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

public function user()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

Subscriber.php

Model

public function subscribers()
{
    return $this->hasMany('App\Models\Subscriber', 'client_id', 'id');
}

public function subscriber()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

public function user()
{
    return $this->belongsTo('App\User', 'user_id', 'id');
}

现在我定义了一个函数，该函数应该链接3个表，如下所示：

public function subscriberTokens(){
    $subscriber_ids = $this->subscribers()->pluck('id')->toArray();
    return SubscriberToken::whereHas('subscriber', function ($query) use($subscriber_ids){
        $query->whereIn('subscribers.id', $subscriber_ids);
    })->get();
}

因此，当我执行该函数时，会出现以下错误：

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'subscribers.id' in  'where clause' (SQL: select * from `subscriber_tokens` where exists (select * from `users` where `subscriber_tokens`.`user_id` = `users`.`id` and `subscribers`.`id` in (1, 16)))

任何帮助都将不胜感激。谢谢。

这应该可以：

public function subscriberTokens(){
    $subscriber_ids = $this->subscribers()->pluck('id')->toArray();
    return SubscriberToken::whereHas('subscriber', function ($query) use($subscriber_ids){
        $query->whereIn('user_id', $subscriber_ids);
    })->get();
}