1

gx_api/GxPress/Repository/GxPress.Repository.Implement/Media/MediaRepository.cs

@@ -658,12 +658,12 @@ namespace GxPress.Repository.Implement.Media
             var sql = $@"SELECT 
                             Id,Blocks
                         FROM
-                            tede_media IsExercises=1 and MediaType={AllTypeConst.Article.GetHashCode()}
+                            tede_media where IsExercises=1 and MediaType={AllTypeConst.Article.GetHashCode()}
                         ORDER BY RAND() LIMIT 1";
             var databaseType = _databaseTypestr.ToEnum<DatabaseType>(DatabaseType.MySql);
             var database = new Database(databaseType, _connectionString);
             var connection = database.GetConnection();
-            return await connection.QueryFirstAsync<SkillInfo>(sql);
+            return await connection.QueryFirstOrDefaultAsync<SkillInfo>(sql);
         }
     }
 }