1.提交缺失的东西

app/api/controller/CartController.php

@@ -38,7 +38,7 @@ class CartController extends BaseApiController
     public function add()
     {
         $post = $this->request->post();
-        $check = $this->validate($post, 'app\api\validate\Cart.add');
+        $check = $this->validate($post, 'app\api\validate\CartValidate.add');
         if (true !== $check) {
             return $this->fail($check);
         }

app/api/validate/CartValidate.php

@@ -0,0 +1,91 @@
+<?php
+// +----------------------------------------------------------------------
+// | likeshop开源商城系统
+// +----------------------------------------------------------------------
+// | 欢迎阅读学习系统程序代码，建议反馈是我们前进的动力
+// | gitee下载：https://gitee.com/likeshop_gitee
+// | github下载：https://github.com/likeshop-github
+// | 访问官网：https://www.likeshop.cn
+// | 访问社区：https://home.likeshop.cn
+// | 访问手册：http://doc.likeshop.cn
+// | 微信公众号：likeshop技术社区
+// | likeshop系列产品在gitee、github等公开渠道开源版本可免费商用，未经许可不能去除前后端官方版权标识
+// |  likeshop系列产品收费版本务必购买商业授权，购买去版权授权后，方可去除前后端官方版权标识
+// | 禁止对系统程序代码以任何目的，任何形式的再发布
+// | likeshop团队版权所有并拥有最终解释权
+// +----------------------------------------------------------------------
+// | author: likeshop.cn.team
+// +----------------------------------------------------------------------
+
+namespace app\api\validate;
+
+use think\facade\Db;
+use think\Validate;
+
+class CartValidate extends Validate
+{
+    protected $rule = [
+        'param' => 'require',
+        'cart_id' => 'require|checkCart',
+        'item_id' => 'require|checkGoods',
+        'goods_num' => 'require|integer|gt:0',
+        'selected' => 'require|in:0,1',
+    ];
+
+    protected $message = [
+        'item_id' => '请选择商品',
+        'goods_num.require' => '商品数量不能为0',
+        'goods_num.gt' => '商品数量需大于0',
+        'goods_num.integer' => '商品数量需为整数',
+        'cart_id.require' => '参数错误',
+        'param.require' => '参数错误',
+        'selected.require' => '参数错误',
+        'selected.in' => '参数错误',
+    ];
+
+    protected function sceneAdd()
+    {
+        $this->only(['item_id', 'goods_num']);
+    }
+
+    protected function sceneDel()
+    {
+        $this->only(['cart_id']);
+    }
+
+    protected function sceneSelected()
+    {
+        $this->only(['cart_id', 'selected']);
+    }
+
+    protected function sceneChange()
+    {
+        $this->only(['cart_id', 'goods_num']);
+    }
+
+
+    protected function checkCart($value, $rule, $data)
+    {
+        $cart = Db::name('cart')->where(['id' => $value])->find();
+        if (!$cart){
+            return '购物车不存在';
+        }
+        return true;
+    }
+
+
+    protected function checkGoods($value, $rule, $data)
+    {
+        $goods = Db::name('goods g')
+            ->field('g.status')
+            ->join('goods_item i', 'i.goods_id = g.id')
+            ->where(['i.id' => $value, 'g.del' => 0])
+            ->find();
+
+        if (!$goods || $goods['status'] == 0) {
+            return '商品已下架';
+        }
+        return true;
+    }
+
+}