Django DateTime 自动转换为 IST 字符串

Question

在 django 中面临这个奇怪的问题，当我将 Obj 作为函数传递时，我的 Obj.date_time 对象被转换为 IST 日期时间字符串。此外，仅基于日志的少数情况会发生这种情况。

#Actual Call
status_time_dict = {4: [orderObj.pickup_time,'dispatch_time'], 
                    5: [orderObj.delivered_time,'delivery_time']}

statusVar = status_time_dict.get(int(orderObj.status), [timezone.now(),"Undefined"])

statusDate = buildDateString(statusVar[0],orderObj, date_format_type = 0,convert_to_ist = 0 )
-----------------------------------------------------------------------

class Order(models.Model):
    name = models.CharField(max_length=100, blank=True)
    house_number = models.CharField(max_length=255)
    contact_number = models.CharField(max_length=13)
    order_date = models.DateField(db_index=True)
    order_time = models.DateTimeField(db_index=True) 
    pickup_time = models.DateTimeField(null=True)
    delivered_time = models.DateTimeField(null=True)

   def get_order_time(self):
       if self.order_time:
           return str(self.order_time.replace(tzinfo=None) + datetime.timedelta(minutes=330))
       else:
           return "not available"

    def get_pickup_time(self):
        if self.pickup_time:
            return str(self.pickup_time.replace(tzinfo=None) + datetime.timedelta(minutes=330))
        else:
            return "not available"

    def get_delivered_time(self):
        if self.delivered_time:
            return str(self.delivered_time.replace(tzinfo=None) + datetime.timedelta(minutes=330))
        else:
            return "not available"

def utc_to_local(utc_dt):
    local_tz = pytz.timezone('Asia/Kolkata')
    local_dt = utc_dt.replace(tzinfo=pytz.utc).astimezone(local_tz)
    return local_tz.normalize(local_dt)


def buildDateString(statusDate,Obj, date_format_type = 1,convert_to_ist = 1):
    if statusDate is None:
        statusDate = timezone.now()

    elif type(statusDate) in [str, unicode]:
    # **This is where it is failing, it should not have ben str or      
    #   unicode as statusDate is being passed as OBJECT
    # OBJ.DATE_TIME should never been a string but is happeing for few 
    # cases only and that too in Prod server only.**
        failing_date = {"OID": Obj.id, "status_order": Obj.status, "failingDateString": statusDate,
            'pickup_time': Obj.pickup_time, 'allot_time': Obj.allot_time, 'delivered_time': Obj.delivered_time}

        print failing_date
        try:
            date_format = {True:"%Y-%m-%dT%H:%M:%S.%fZ", False:"%Y-%m-%d %H:%M:%S"}
            format = date_format.get('Z' in statusDate,"Y-%m-%d %H:%M:%S")
            statusDate = datetime.datetime.strptime(statusDate, format)
            if date_format_type == 1:
                return statusDate.strftime('%d-%m-%Y %H:%M:%S')
            else:
                return statusDate.strftime('%Y-%m-%d %H:%M:%S')
        except ValueError:
            statusDate = timezone.now()
    if convert_to_ist ==1:
        statusDate = utc_to_local(statusDate)
    if date_format_type == 1:
        statusDate = (statusDate).strftime('%d-%m-%Y %H:%M:%S')
    else:
        statusDate = (statusDate).strftime('%Y-%m-%d %H:%M:%S')
    return statusDate

请参阅 elif 中的评论以获取有关正在发生的错误的更多信息。

另外，在我的 models.py 中，我定义了一个 get_COLUMN_NAME 函数，它转换为 IST 字符串，但在此上下文中没有调用它。我怀疑这是否是上述奇怪行为的原因

Answer 1

您必须检查 orderObj 的来源。从数据库中获取对象后，可能有其他代码正在修改该对象的日期时间字段。