后台控制大屏显示内容

@@ -6,6 +6,7 @@ use app\admin\model\item\ronda\Rel;
 use app\common\controller\Backend;
 use mysql_xdevapi\DocResult;
 use think\Db;
+use think\Exception;
 use think\exception\DbException;
 use think\exception\PDOException;
 use think\exception\ValidateException;
@@ -231,4 +232,56 @@ class Screen extends Backend
         return $this->view->fetch();
     }
 
+    /**
+     *  批量修改
+     */
+    public function multi($ids = NULL){
+        if (!$this->request->isPost()) {
+            $this->error(__("Invalid parameters"));
+        }
+        $ids = $ids ? $ids : $this->request->post("ids");
+        $ids = $ids ?: $this->request->post('ids');
+        if (empty($ids)) {
+            $this->error(__('Parameter %s can not be empty', 'ids'));
+        }
+
+        if (false === $this->request->has('params')) {
+            $this->error(__('No rows were updated'));
+        }
+        parse_str($this->request->post('params'), $values);
+        $values = $this->auth->isSuperAdmin() ? $values : array_intersect_key($values, array_flip(is_array($this->multiFields) ? $this->multiFields : explode(',', $this->multiFields)));
+        if (empty($values)) {
+            $this->error(__('You have no permission'));
+        }
+        $adminIds = $this->getDataLimitAdminIds();
+        if (is_array($adminIds)) {
+            $this->model->where($this->dataLimitField, 'in', $adminIds);
+        }
+        $count = 0;
+        Db::startTrans();
+        try {
+            $list = $this->model->where($this->model->getPk(), 'in', $ids)->select();
+            $res = $this->model->where('is_view',1)->find()->toArray();
+            foreach ($list as $item) {
+                //注意：修改区域！！！！！！！！！！！！
+                if ($values['is_view'] == 1) {
+                    if (!empty($res)){
+                        $this->error('当前已有显示内容，不能重复选择');
+                    }else{
+                        $values['is_view'] = 1;
+                    }
+                }
+                $count += $item->allowField(true)->isUpdate(true)->save($values);
+            }
+            Db::commit();
+        } catch (PDOException|Exception $e) {
+            Db::rollback();
+            $this->error($e->getMessage());
+        }
+        if ($count) {
+            $this->success();
+        }
+        $this->error(__('No rows were updated'));
+    }
+
 }
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