Php Larvel 4：如何检索一对多关系中的数据？

（见下面的代码）

我有两个模型和用户信息。我想根据每个输入的对话id，获取10条带有相关发件人姓名的消息，并反转数据。我已经成功地获取了这些消息，但无法将其缩小到每个会话/包含相关发件人名称的10条消息

我已尝试使用用户数据返回消息数据，但我不知道如何访问发件人的名称，或者它不返回关联的用户：

$allMessages = Messages::with('User')->whereIn('conv_id',$conv_id);

我也尝试过返回10条消息，但它会根据收到的所有消息而不是每次对话返回10条消息

$allMessages = Messages::whereIn('conv_id',$conv_id)->take(10);

如何根据每个对话的id以及邮件的关联发件人名称获取10封邮件？代码改进的额外积分。提前谢谢你

---

用户模型

public function messages(){
    return $this->hasMany('Messages');
}

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

消息模型

public function messages(){
    return $this->hasMany('Messages');
}

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

控制器

public function index()
    {
        $timestamps = Input::get('from'); //timestamp of latest message
        $conv_id = Input::get('conv_id'); //array of conversation ids
        $allMessages = Messages::whereIn('conv_id',$conv_id);
        if(is_null($timestamps)){
           $messages = $allMessages->orderBy('created_at','desc');
        }else{
           asort($timestamps);
           $messages = $allMessages->where('created_at','>',end($timestamps));
        }
        return $messages->get()->reverse();
    }

---

迁移

消息表

Schema::create('messages', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('conv_id');
            $table->text('body');
            $table->timestamps();
        });

Schema::create('users',function($table)
        {
            $table->increments('id');
            $table->string('email')->unique();
            $table->string('password',100);
            $table->string('name',150);
            $table->string('usertype',50);
            $table->boolean('block');
            $table->string('remember_token',100);
            $table->timestamp('lastlogin_at');
            $table->timestamps();
            $table->softDeletes();
        });

0: {id:37, user_id:1, conv_id:2, body:damn mate, created_at:2014-06-20 00:55:32,…}
1: {id:38, user_id:1, conv_id:2, body:hello, created_at:2014-06-20 02:18:21,…}
2: {id:39, user_id:1, conv_id:2, body:dude, created_at:2014-06-20 02:20:10,…}
3: {id:40, user_id:1, conv_id:2, body:test, created_at:2014-06-20 06:52:37,…}
4: {id:67, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 01:25:56,…}
5: {id:68, user_id:1, conv_id:2, body:hey, created_at:2014-06-21 01:26:14, updated_at:2014-06-21 01:26:14,…}
6: {id:69, user_id:1, conv_id:1, body:testa, created_at:2014-06-21 01:27:02,…}
7: {id:70, user_id:1, conv_id:1, body:testser, created_at:2014-06-21 01:27:32,…}
8: {id:115, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 02:45:06,…}
9: {id:116, user_id:1, conv_id:2, body:test, created_at:2014-06-21 02:57:03,…}

用户表

Schema::create('messages', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('conv_id');
            $table->text('body');
            $table->timestamps();
        });

Schema::create('users',function($table)
        {
            $table->increments('id');
            $table->string('email')->unique();
            $table->string('password',100);
            $table->string('name',150);
            $table->string('usertype',50);
            $table->boolean('block');
            $table->string('remember_token',100);
            $table->timestamp('lastlogin_at');
            $table->timestamps();
            $table->softDeletes();
        });

0: {id:37, user_id:1, conv_id:2, body:damn mate, created_at:2014-06-20 00:55:32,…}
1: {id:38, user_id:1, conv_id:2, body:hello, created_at:2014-06-20 02:18:21,…}
2: {id:39, user_id:1, conv_id:2, body:dude, created_at:2014-06-20 02:20:10,…}
3: {id:40, user_id:1, conv_id:2, body:test, created_at:2014-06-20 06:52:37,…}
4: {id:67, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 01:25:56,…}
5: {id:68, user_id:1, conv_id:2, body:hey, created_at:2014-06-21 01:26:14, updated_at:2014-06-21 01:26:14,…}
6: {id:69, user_id:1, conv_id:1, body:testa, created_at:2014-06-21 01:27:02,…}
7: {id:70, user_id:1, conv_id:1, body:testser, created_at:2014-06-21 01:27:32,…}
8: {id:115, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 02:45:06,…}
9: {id:116, user_id:1, conv_id:2, body:test, created_at:2014-06-21 02:57:03,…}

---

编辑：在chrome浏览器中查看狼人答案的预览结果

Schema::create('messages', function(Blueprint $table)
        {
            $table->increments('id');
            $table->integer('user_id');
            $table->integer('conv_id');
            $table->text('body');
            $table->timestamps();
        });

Schema::create('users',function($table)
        {
            $table->increments('id');
            $table->string('email')->unique();
            $table->string('password',100);
            $table->string('name',150);
            $table->string('usertype',50);
            $table->boolean('block');
            $table->string('remember_token',100);
            $table->timestamp('lastlogin_at');
            $table->timestamps();
            $table->softDeletes();
        });

0: {id:37, user_id:1, conv_id:2, body:damn mate, created_at:2014-06-20 00:55:32,…}
1: {id:38, user_id:1, conv_id:2, body:hello, created_at:2014-06-20 02:18:21,…}
2: {id:39, user_id:1, conv_id:2, body:dude, created_at:2014-06-20 02:20:10,…}
3: {id:40, user_id:1, conv_id:2, body:test, created_at:2014-06-20 06:52:37,…}
4: {id:67, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 01:25:56,…}
5: {id:68, user_id:1, conv_id:2, body:hey, created_at:2014-06-21 01:26:14, updated_at:2014-06-21 01:26:14,…}
6: {id:69, user_id:1, conv_id:1, body:testa, created_at:2014-06-21 01:27:02,…}
7: {id:70, user_id:1, conv_id:1, body:testser, created_at:2014-06-21 01:27:32,…}
8: {id:115, user_id:1, conv_id:2, body:haha, created_at:2014-06-21 02:45:06,…}
9: {id:116, user_id:1, conv_id:2, body:test, created_at:2014-06-21 02:57:03,…}

你可以试试这个：

$allMessages = Messages::with('user')
                       ->where('conv_id', $conv_id)
                       ->take(10)
                       ->get();

这将返回

消息的集合

模型，因此您需要像这样循环：

@foreach($allMessages as $message)
    {{ $message->user->name }}
    {{ $message->body }}
@endforeach

此外，您还可以使用：

// Get the first message and then user->name
$allMessages->first()->user->name;

// Get the second message and then user->name
$allMessages->get(1)->user->name;

//dd（json_编码（$heartsPurReport））

//在视图中，使用foreach循环并在foreach循环外部使用以下分页

                       {!! $consumption->render() !!}

---

我如何访问用户名？我似乎在var_dump对象中找不到它。

$allMessages->first（）->user->name

谢谢！顺便说一句，我注意到你使用where（）而不是where（）。这是打字错误还是我真的应该用where？顺便说一句，我的conv_id是一个会话id数组。您应该使用

where

。如果

$conv_id

是多个

conv_id

的数组，那么您应该使用

where

，否则使用

where

，欢迎：-）