更新

@@ -280,6 +280,31 @@ class Order extends Api
     }
 
     /**
+     * @ApiTitle    (判断库存)
+     * @ApiMethod   (POST)
+     * @ApiHeaders  (name=token, type=string, required=true, description="请求的Token")
+     * @ApiParams   (name="sku_id", type="integer", required=true, description="规格id")
+     * @ApiParams   (name="number", type="integer", required=true, description="购买数量")
+     * @ApiReturn   ({
+    'code':'1',
+    'msg':'SUCCESS'
+    'data': code 等于1表示未超出最大值
+    })
+     */
+    public function checkStock()
+    {
+        $sku_id = $this->request->post('sku_id');
+        $number = $this->request->post('number');
+        if (!$number) $this->error('请选择购买数量');
+        if (!$sku_id) $this->error('请选择规格');
+        $model = new GoodsSpec();
+        $sku = $model::get($sku_id);
+        if (!$sku) $this->error('规格已失效,请重新选择');
+        if ($sku['stock_num'] < $number) $this->error('已超出最大库存');
+        $this->success('SUCCESS');
+    }
+
+    /**
      * @ApiTitle    (计算运费)
      * @ApiMethod   (POST)
      * @ApiHeaders  (name=token, type=string, required=true, description="请求的Token")