Laravel 4很多人都有Eloquent和复选框

Question

我正在尝试使用Laravel 4修复我的应用程序的问题.问题是关于Eloquent和M:M的关系.

这是我的情况:我有很多用户可以选择多种服务,每种服务都可以提供专用价格.在数据库中,我有名为"services","users"和"users_services"的表.所以目前我可以保存每个用户选择的服务和价格,但我的问题是我不知道如何回复并向用户展示,我的意思是我不知道如何设置"已检查"每个选定服务的复选框以及每个服务的价格.

您可以在Paste Laravel上查看代码以获取任何分支.我也把它贴在这里.

    <?php

class Service extends Eloquent {

    public static $rules = array();

    protected $guarded = array('id');

    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'services';

    /**
     * -------------------------------------
     * All Joins w/ other tables
     * -------------------------------------
     **/
    public function users()
    {
        return $this->belongsToMany('User','users_services','services_id','user_id');
    }
}

......

<?php

class User extends Eloquent {

    public static $rules = array();

    protected $guarded = array('id');

    /**
     * The database table used by the model.
     *
     * @var string
     */
    protected $table = 'users';

    /**
     * -------------------------------------
     * All Joins w/ other tables
     * -------------------------------------
     **/
    public function services()
        {
            return $this->belongsToMany('Service','users_services','user_id','service_id');
        }       
}

................

// Inside the controller 

$services = Service::all();
$this->layout->content = View::make('private.user.services')->with(compact('services'));

...............

// The view
@foreach($services as $service)
 <div class="pull-left col-lg-6 service-container">
  <div class="checkbox pull-left">
   <label>
    <input type="checkbox" name="services[]" value="{{ $service->id }}"><span>{{ $service->name }}</span>
   </label>
  </div>
  <div class="input-group service-price pull-right">
  <input type="number" min="0" name="prices[{{$service->id}}]" class="form-control pull-rigth" placeholder="0">
   <span class="input-group-btn">
    <button class="btn btn-default" type="button" disabled><i class="icon-eur"></i></button>
   </span>
  </div>
 </div>
@endforeach

Answer 1

在您看来,当您循环浏览所有可能的服务时,您需要检查当前用户是否已选择该服务.

一种方法是将第二个集合发送到用户服务的页面,然后使用该contains()方法进行检查.

在Controller中,将用户关系中的服务拉入新变量:

$services      = Service::all();
$user_services = $user->services;
$this->layout->content = View::make('private.user.services')->with(compact('services'))->with('user_services', $user_services);

在您的视图中,只需将选中的attr添加到复选框即可.

@foreach($services as $service)
 <div class="pull-left col-lg-6 service-container">
  <div class="checkbox pull-left">
   <label>
    <input type="checkbox" name="services[]" value="{{ $service->id }}" @if( $user_services->contains($service->id) ) selected@endif><span>{{ $service->name }}</span>
   </label>
  </div>
  <div class="input-group service-price pull-right">
  <input type="number" min="0" name="prices[{{$service->id}}]" class="form-control pull-rigth" placeholder="0">
   <span class="input-group-btn">
    <button class="btn btn-default" type="button" disabled><i class="icon-eur"></i></button>
   </span>
  </div>
 </div>
@endforeach

注意,它没有经过测试,我不知道模型之间的关系..但它应该没问题:)

(注意,你的某个课程中有拼写错误.. pull-rigth)