如何在Laravel 5中使用Eloquent更新数据透视表 [英] How to update a pivot table using Eloquent in laravel 5

问题描述

我是laravel的新手.我正在开发laravel 5应用程序，并且被卡在这里.我有2个这样的模型:

I am new to laravel. I am working on a laravel 5 app and I am stuck here. I have 2 models as such:

class Message extends Eloquent{

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

    public function users()
    {
        return $this->belongsToMany('App\User')->withPivot('status');
    }
}

class User extends Eloquent {

    public function messages()
    {
        return $this->hasMany('App\Message', 'from');
    }

    public function receive_messages() {
        return $this->belongsToMany('App\Message')->withPivot('status');
    }
}

消息和用户之间存在多对多关系，因此给我提供了一个数据透视表:

There exist a many-to-many relationship between Message and User giving me a pivot table as such:

Table Name: message_user
Colums:
message_id
user_id
status

我有这样的SQL查询:

I have an SQL query as such:

update message_user
set status = 1
where user_id = 4 and message_id in (select id from messages where message_id = 123)

如何将该查询翻译为laravel等效项?

How can I translate this query to the laravel equivalent?

推荐答案

以下代码解决了我的问题:

The code below solved my problem:

$messages  = Message::where('message_id', $id)->get();
foreach($messages as $message)
   $message->users()->updateExistingPivot($user, array('status' => 1), false);

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