refactor: 视频分类删除检查分类下是否存在视频

app/admin/model/v1/VideoCategoryModel.php

@@ -11,6 +11,12 @@ use app\common\model\VideoCategoryBaseModel;
  */
 class VideoCategoryModel extends VideoCategoryBaseModel
 {
+    // 关联视频模型
+    public function video()
+    {
+        return $this->hasMany(VideoModel::class, 'category_id', 'id');
+    }
+
     // 分类名称搜索
     public function searchNameAttr($query, $value)
     {