更新

@@ -77,6 +77,33 @@ class Cart extends Api
     }
 
     /**
+     * @ApiTitle    (减少购物车数量)
+     * @ApiMethod   (POST)
+     * @ApiHeaders  (name=token, type=string, required=true, description="请求的Token")
+     * @ApiParams   (name="id", type="integer", required=true, description="购物车id")
+     * @ApiParams   (name="number", type="integer", required=true, description="减少数量")
+     * @ApiReturn   ({
+    'code':'1',
+    'msg':'SUCCESS'
+    })
+     */
+    public function subCartNumber()
+    {
+        $id = $this->request->post('id');
+        $number = $this->request->post('number');
+
+        if (!is_numeric($id)  || !is_numeric($number)) $this->error('参数不合法');
+
+        $model = new \app\api\model\Cart();
+        if ($model->where('id',$id)->value('number') ==1){
+            $this->error('购物车数量不可再减少');
+        }else{
+            $model->where('id',$id)->setDec('number',$number);
+        }
+        $this->success('SUCCESS');
+    }
+
+    /**
      * @ApiTitle    (购物车列表)
      * @ApiMethod   (POST)
      * @ApiHeaders  (name=token, type=string, required=true, description="请求的Token")