购物车的添加 展示

添加：

详情页接到的值：goos_id，spec_goods_id，number

控制层：

  public function cart(Request $request)
    {
//        1. 接收数据

       $params= input();
//      2. 验证

        //加入购物车
CartLogic::addCart($params['goods_id'],$params['spec_goods_id'],$params['number']);

        $goods = CartLogic::getGoodsWithSpec($params['spec_goods_id'], $params['goods_id']);
        return view('addcart', ['goods' => $goods, 'number' => $params['number']]);


    }

服务层：

<?php

namespace app\admin\logic;

use app\admin\model\Cart;
use think\Cookie;

class CartLogic
{
   static function addCart($goods_id,$spec_goods_id,$number,$is_selected=1){

       if(session('user_id')){
           $user_id=session('user_id');
           $where=[
               'user_id'=>$user_id,
               'goods_id'=>$goods_id,
               'spec_goods_id'=>$spec_goods_id,
               'number'=>$number
           ];
           $info=Cart::where($where)->find();
           if($info){
               $info->number +=$number;
               $info->is_selected=$is_selected;
               $info->save();
           }else{
               $where['number']=$number;
               $where['is_selected']=$is_selected;
               Cart::create($where);
           }

       }else{
           $data=\cookie('data')?:[];
           $key=$goods_id.'_'.$spec_goods_id;
           if(isset($data[$key])){
               $data[$key]['number']+=$number;
               $data[$key]['is_selected']+=$is_selected;

           }else{
               $data[$key]=[
                  'id'=>$key,
                  'user_id'=>'',
                  'spec_goods_id'=>$spec_goods_id,
                  'number'=>$number,
                  'is_selected'=>$is_selected
               ];
           }
           \cookie('cart',$data);
       }
   }

    public static function getGoodsWithSpec($spec_goods_id, $goods_id)
    {
        //如果有sku的id， 就以之作为查询条件
        if($spec_goods_id){
            //有sku，且有多个，需要根据sku的id取指定的一个
            $where = ['t2.id'=>$spec_goods_id];
        }else{
            //没有sku， 就根据商品id查询，sku相关的字段都是null
            $where = ['t1.id' => $goods_id];
        }
        //如果没有，就以商品id作为查询条件
        $goods = self::alias('t1')
            ->join('pyg_spec_goods t2', 't1.id=t2.goods_id', 'left')
            ->field('t1.*, t2.value_ids, t2.value_names, t2.price, t2.cost_price as cost_price2, t2.store_count')
            ->where($where)
            ->find();
//        //如果sku信息中，price  cost_price 大于0，则覆盖商品信息中的对应字段
        if($goods['price'] > 0){
            $goods['goods_price'] = $goods['price'];
        }
        if($goods['cost_price2'] > 0){
            $goods['cost_price'] = $goods['cost_price2'];
        }
        return $goods;
    }




}

模型层：需要购物车表



展示：需要 goods 和 spec_goods cart 

控制层：

  public function index()
    {
        $getGoods= \app\goods\model\Cart::show();
//        return json($getGoods);
        if(!empty($getGoods['spec_goods'])){
            if($getGoods['spec_goods'][0]['price'] > 0){
                $getGoods['goods_price'] = $getGoods['spec_goods'][0]['price'];
            }
            if($getGoods['spec_goods'][0]['cost_price'] > 0){
                $getGoods['cost_price'] = $getGoods['spec_goods'][0]['cost_price'];
            }
            if($getGoods['spec_goods'][0]['store_count'] > 0){
                $getGoods['store_count'] = $getGoods['spec_goods'][0]['store_count'];
            }else{
                $goods['store_count'] = 0;
            }
        }
        $this->assign('getGoods',$getGoods);
        return view();
    }

模型：

<?php

namespace app\goods\model;

use think\Model;

class Cart extends Model
{
 static function show(){
    return self::with(['goods','goods.specGoods'])->where('is_selected', 1)->select();
 }

     function goods(){
     return  $this->belongsTo('Goods','goods_id','id');
    }

}

<?php

namespace app\goods\model;

use think\Model;

class Goods extends Model
{
    static function getAll()
    {
        return self::paginate(10);
    }


    static function show($id)
    {
        return self::with('SpecGoods')->where('id',$id)->find();
    }



    function SpecGoods()
    {
        return $this->belongsTo('SpecGoods', 'id', 'goods_id');
    }


}

 * 登录后将cookie购物车迁移到数据表
 */
public static function cookieToDb()
{
    //从cookie中取出所有数据
    $data = cookie('cart')?:[];
    //将数据添加/修改到数据表
    foreach($data as $v){
        self::addCart($v['goods_id'], $v['spec_goods_id'], $v['number']);
    }
    //删除cookie购物车数据
    cookie('cart', null);
}