抓孩子和父母 - Laravel雄辩 [英] Fetch child and parent - Laravel Eloquent

问题描述

在 laravel 我有以下2个型号;
这是父母

 <？php 
 
命名空间App \Models; 
 
使用Illuminate\Database\Eloquent\Model; 
 
 class RestaurantClass扩展模型
 {
 / ** 
 *获取餐厅类的餐厅。 
 * / 
 public function restaurants（）
 {
 return $ this-> hasMany（'App\Models\Restaurant'）; 
} 
} 
  

这是孩子;

 <？php 
 
命名空间App\Models; 
 
使用Illuminate\Database\Eloquent\Model; 
 
类餐厅扩展模型
 {
 / ** 
 *获取拥有餐厅的餐厅类。 
 * / 
 public function restaurantClass（）
 {
 return $ this-> belongsTo（'App \Models\RestaurantClass'）; 
} 
} 
  

如何检索孩子，它是父母和副

$ b

解决方案方法
。

/ p>

将此应用于您的示例将如下所示：

它的孩子：

  $ restaurantClasses = RestaurantClass :: with（'restaurants'） - > get（）; 
 
 //访问children
 foreach（$ restaurantClasses as $ restaurantClass）{
 $ restaurantClass->餐厅; 
} 
  

使用父母保护孩子：

  $ restaurants = Restaurant :: with（'restaurantClass'） - > get（）; 
 
 //访问父模型
 foreach（$ restaurant as $ restaurant）{
 $ restaurant-> restaurantClass; 
} 
  

In laravel I have the below 2 models; This is the parent

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class RestaurantClass extends Model
{
    /**
     * Get the restaurants for the restaurant class.
     */
    public function restaurants()
    {
        return $this->hasMany('App\Models\Restaurant');
    }
}

And this is the child;

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Restaurant extends Model
{    
    /**
     * Get the restaurant class that owns the restaurant.
     */
    public function restaurantClass()
    {
        return $this->belongsTo('App\Models\RestaurantClass');
    }
}

How can I retrieve the child and it's parent and vice versa (retrieve the parent and all its children)

Any guidance appreciated.

解决方案

To query relationships in Laravel, use the with($relation) method on the model class you want.

Applying this to your example would be like :

Retreive the parent with its children :

$restaurantClasses = RestaurantClass::with('restaurants')->get();

// to access "children" 
foreach($restaurantClasses as $restaurantClass) {
  $restaurantClass->restaurants;
}

Retreive the children with their parent :

$restaurants = Restaurant::with('restaurantClass')->get();

// to access "parent" models
foreach($restaurants as $restaurant) {
  $restaurant->restaurantClass;
}

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