Laravel Eloquent ——模型间关系(关联)hasMany,belongsTo 的用法

版权声明:廖圣平博客,未经博主允许不得转载。企鹅:1194008361 https://blog.csdn.net/qq_22823581/article/details/85259903

比如一个商品有多个sku

hasMany

模型

<?php

namespace App\Models;


class Goods extends BaseModel
{
    public function getProduct(){
        return $this->hasMany('App\Models\Products','goods_code','code');
    }
}

调用:

Goods::with('getProduct')->where('code',$goods_id)->get();
{
  "code": 200,
  "message": "成功",
  "data": [
    {
      "id": "553",
      "code": "2017112322212452505251",

      "get_product": [
        {
          "id": "5551",
          "goods_code": "2017112322212452505251",
   
        },
        {
          "id": "5552",
          "goods_code": "2017112322212452505251",

        }
      ]
    }
  ]
}

从返回的json中可以看出,一个goods中,包含了两个product信息。

一个sku属于一个goods

所以用:

belongsTo

product 模型中:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Products extends Model
{
    public function goods(){
       return $this->belongsTo('App\Models\Goods','goods_code','code');
    }


}

使用:

    public function getProductByGoods_id($product_id=''){
        return Goods::with('getProduct')->where('code',$product_id)->get();
    }

输出:

{
  "code": 200,
  "message": "成功",
  "data": [
    {
      "id": "5555",
      "goods_code": "2017112322212452505251",
      "goods": {
        "id": "553",
        "code": "2017112322212452505251",

      }
    }
  ]
}

从json中可以看出,一个sku对应一个goods 信息。

多对多关系 belongsToMany

中间有个表做映射关系。
比如一个商品对应不同的配送区域模板, 中间表为: godos_area_map ,存的数据为:goods_id ,还有area_id

在Goods model中编写:

   public function ShipArea(){
            return $this->belongsToMany('App\Models\ShipArea', 'goods_shiparea_map', 'goods_id', 'ship_area_id');
        }

调用

<?php

namespace App\Http\Repository\Services;
use App\Models\Goods;

class ShipAreaRepository
{
    /**
     * 根据goodsid 获取不配送区域数据
     *
     * @param string $goods_id
     *
     * @return array
     */
    public function getAreaInfoByGoodsId($goods_id=''){
        return Goods::with('ShipArea')->where('id',$goods_id)->get();
    }

}

猜你喜欢

转载自blog.csdn.net/qq_22823581/article/details/85259903
今日推荐