public function update(Request $request, $id)
 {
     $messages = ['name.required' => '商品名称不能为空!', 'category_id.required' => '商品分类不能为空!'];
     $this->validate($request, ['name' => 'required', 'category_id' => 'required'], $messages);
     $good = Good::find($id);
     $result = $request->except(['imgs', 'attr_id_list', 'attr_value_list', 'attr_price_list']);
     //如果checkbox未选中,设置为false
     $result = isset($request->best) ? $result : array_add($result, 'best', false);
     $result = isset($request->new) ? $result : array_add($result, 'new', false);
     $result = isset($request->hot) ? $result : array_add($result, 'hot', false);
     $result = isset($request->onsale) ? $result : array_add($result, 'onsale', false);
     $good->update($result);
     //增加属性
     if ($request->attr_id_list) {
         //先删除原有属性
         Good_attr::where('good_id', $id)->delete();
         foreach ($request->attr_id_list as $k => $v) {
             $good_attr = new Good_attr();
             $good_attr->good_id = $good->id;
             $good_attr->attr_id = $v;
             $good_attr->attr_value = $request->attr_value_list["{$k}"];
             $good_attr->attr_price = $request->attr_price_list["{$k}"];
             $good_attr->save();
         }
     }
     //商品相册
     if ($request->imgs) {
         foreach ($request->imgs as $img) {
             $good_gallery = new Good_gallery();
             $good_gallery->good_id = $good->id;
             $good_gallery->img = $img;
             $good_gallery->save();
         }
     }
     return redirect(route('admin.good.index'))->with('info', '编辑商品成功');
 }
 public function update(Request $request, $id)
 {
     $good = Good::find($id);
     $result = $request->except(['imgs', 'attr_id_list', 'attr_value_list', 'attr_price_list']);
     $result = isset($result->hot) ? $result : array_add($result, 'hot', 0);
     $result = isset($result->best) ? $result : array_add($result, 'best', 0);
     $result = isset($result->new) ? $result : array_add($result, 'new', 0);
     $result = isset($result->onsale) ? $result : array_add($result, 'onsale', 0);
     $good->update($result);
     //增加属性
     if ($request->attr_id_list) {
         //先删除原有属性
         Good_attr::where('good_id', $id)->delete();
         foreach ($request->attr_id_list as $k => $v) {
             $good_attr = new Good_attr();
             $good_attr->good_id = $good->id;
             $good_attr->attr_id = $v;
             $good_attr->attr_value = $request->attr_value_list["{$k}"];
             $good_attr->attr_price = $request->attr_price_list["{$k}"];
             $good_attr->save();
         }
     }
     //商品相册
     if ($request->imgs) {
         foreach ($request->imgs as $img) {
             $good_gallery = new Good_gallery();
             $good_gallery->good_id = $good->id;
             $good_gallery->img = $img;
             $good_gallery->save();
         }
     }
     return redirect(route('admin.good.index'))->with('info', '编辑商品成功');
 }