如何在 Laravel 5 中使用 Eloquent 更新数据透视表

问题描述

我是 Laravel 的新手.我正在开发一个 Laravel 5 应用程序，但我被困在这里.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('AppUser', 'from');
    }

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

class User extends Eloquent {

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

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

Message 和 User 之间存在多对多关系，为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

我有一个这样的 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)

如何将此查询转换为 Laravel 等效项?

How can I translate this query to the laravel equivalent?

推荐答案

下面的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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