我如何加入 Eloquent: 关系？

Posted 2023-03-15

【中文标题】我如何加入 Eloquent: 关系？

【英文标题】：How can I join with Eloquent: Relationships?

【发布时间】：2017-07-27 06:38:52

【问题描述】：

我的查询是这样的：

<?php
public function getListReviews()

    $reviews = Review::where('user_id', auth()->user()->id)
                     ->get();
    return $reviews;

从查询中，可以通过id获取所有review数据

我想要获取用户照片、商店照片和产品照片

我想让它使用 Eloquent:Relationships

如何通过 Eloquent:Relationships 获得它？

我的评论模型是这样的：

<?php
namespace App;
use Jenssegers\Mongodb\Eloquent\Model as Eloquent;
use Jenssegers\Mongodb\Eloquent\HybridRelations;
class Review extends Eloquent

    use HybridRelations;
    protected $connection = 'mongodb';
    protected $fillable = ['user_id', 'user_name', 'product_id', 'product_name', 'store_id', 'store_name', 'invoice_number', 'rating', 'comments', 'created_at', 'updated_at'];
    public function user()
    
        return $this->belongsTo(User::class);
    

我的用户模型是这样的：

<?php
namespace App;
...
class User extends Authenticatable

    ...
    protected $fillable = ['name', 'email', 'password', 'birth_date', 'mobile_number', 'photo'];
    public function store()
    
        return $this->hasOne(Store::class);
    

我的店铺模型是这样的：

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Store extends Model
   
    protected $fillable = ['user_id', 'name', 'address', 'phones', 'total_product', 'photo'];
    public function products() 
    
        return $this->hasMany(Product::class);
    

我的产品型号是这样的：

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class Product extends Model

    protected  $fillable = ['store_id','category_id','name', 'photo','description'];
    public function store()
    
        return $this->belongsTo(Store::class);
    

【参考方案1】：

如果您想从评论模型中找出产品和商店，请在Review 模型中添加两​​个方法，如下所示。

编辑App\Review.php

//You already have key to to find store i.e. store_id
public function store()

    return $this->belongsTo(Store::class);



//You already have key to to find product i.e. product_id    
public function product()

    return $this->belongsTo(Product::class);

然后执行如下查询

$reviews = Review::where('user_id', auth()->user()->id)
           ->with('store')
           ->with('product')
           ->with('user')
           ->get();

您可以通过以下方式访问它们，

以$review 遍历$reviews 对象

$review->store->photo;
$review->product->photo;
$review->user->photo;