解决django模型类时间格式告警

 模型类中的字段类型 models.DateTimeField

 RuntimeWarning: DateTimeField Get_GB_Model.request_time received a naive datetime (2019-11-28 10:45)

因为数据包含日期类型，所以会报： RuntimeWarning: DateTimeField Event.starttime received a naive datetime (2016-09-02 10:20:00) while time zone support is active.的错误。