Question

如何让Django在下面生成/提交确切的查询：

SELECT "MESSAGE"."MSG_NO", "MESSAGE"."MSG_TYPE", "MESSAGE"."DIRECTION", "MESSAGE"."SESSION_NO", "MESSAGE"."SEQUENCE_NO", "MESSAGE"."REF_SESSION", "MESSAGE"."REF_SEQUENCE", "MESSAGE"."ACKTIME", "MESSAGE"."ACKNAKSTATUS", "MESSAGE"."PRIORITY", "MESSAGE"."DELIVMONITOR", "MESSAGE"."OBSOLESCENCE", "MESSAGE"."DISPOSITION", "MESSAGE"."TRAILER", "MESSAGE"."BYPASSED", "MESSAGE"."RESPONSE_QUEUE", "MESSAGE"."SOURCE_QUEUE", "MESSAGE"."QUEUE", "MESSAGE"."QUEUE_PRIORITY", "MESSAGE"."DATE_CREATED", "MESSAGE"."DATE_ROUTED", "MESSAGE"."INPUT_FILE", "MESSAGE"."OUTPUT_FILE", "MESSAGE"."STATUS1", "MESSAGE"."STATUS2", "MESSAGE"."STATUS3", "MESSAGE"."USERID", "MESSAGE"."TMSTAMP" 
FROM "MESSAGE" 
WHERE ("MESSAGE"."DATE_CREATED" >= (SYSDATE-3) 
AND "MESSAGE"."DIRECTION" = 0 
AND "MESSAGE"."STATUS1" = 0)

以下代码产生的查询无效：

Message.objects.using(queue_db_env).filter(STATUS1=0, DIRECTION=0, DATE_CREATED__gte=time_threshold)

下面是上面的代码产生的查询，当我手动运行它时将不起作用：

SELECT "MESSAGE"."MSG_NO", "MESSAGE"."MSG_TYPE", "MESSAGE"."DIRECTION", "MESSAGE"."SESSION_NO", "MESSAGE"."SEQUENCE_NO", "MESSAGE"."REF_SESSION", "MESSAGE"."REF_SEQUENCE", "MESSAGE"."ACKTIME", "MESSAGE"."ACKNAKSTATUS", "MESSAGE"."PRIORITY", "MESSAGE"."DELIVMONITOR", "MESSAGE"."OBSOLESCENCE", "MESSAGE"."DISPOSITION", "MESSAGE"."TRAILER", "MESSAGE"."BYPASSED", "MESSAGE"."RESPONSE_QUEUE", "MESSAGE"."SOURCE_QUEUE", "MESSAGE"."QUEUE", "MESSAGE"."QUEUE_PRIORITY", "MESSAGE"."DATE_CREATED", "MESSAGE"."DATE_ROUTED", "MESSAGE"."INPUT_FILE", "MESSAGE"."OUTPUT_FILE", "MESSAGE"."STATUS1", "MESSAGE"."STATUS2", "MESSAGE"."STATUS3", "MESSAGE"."USERID", "MESSAGE"."TMSTAMP" 
FROM "MESSAGE" 
WHERE ("MESSAGE"."DATE_CREATED" >= 2018-09-15 12:47:43.784709 
AND "MESSAGE"."DIRECTION" = 0 
AND "MESSAGE"."STATUS1" = 0)

这是由于"MESSAGE"."DATE_CREATED" >= 2018-09-15 12:47:43.784709造成的，查询仅在我将DATE_CREATE换为"MESSAGE"."DATE_CREATED" >= (SYSDATE-3)子句时才有效

我的views.py具有以下代码：

class MessageList(APIView):
  def get(self, request, queue_db_env, queue_name, queue_id, format=None):
      #
      # time_threshold = datetime.now() - timedelta(hours=36)
      now = timezone.now()
      time_threshold = now - datetime.timedelta(hours=36)
      print(time_threshold.timestamp())

      str_time_threshold = time_threshold.timestamp()

      #
      messages = Message.objects.using(queue_db_env).filter(STATUS1=0, DIRECTION=0, DATE_CREATED__gte=time_threshold)
      print(messages.query)
      serializer = MessageSerializer(messages, many=True)

      return Response({"Queue": queue_name, "Queue_ID": queue_id, "Queue_Messages": serializer.data})

我的models.py是：

from django.db import models

class Message(models.Model):
  MSG_NO = models.IntegerField(primary_key=True,)
  MSG_TYPE = models.IntegerField()
  DIRECTION = models.IntegerField()
  SESSION_NO = models.IntegerField()
  SEQUENCE_NO = models.IntegerField()
  REF_SESSION = models.IntegerField()
  REF_SEQUENCE = models.IntegerField()
  ACKTIME = models.DateTimeField(max_length = 7)
  ACKNAKSTATUS = models.IntegerField()
  PRIORITY = models.CharField(max_length = 1)
  DELIVMONITOR = models.IntegerField()
  OBSOLESCENCE = models.IntegerField()
  DISPOSITION = models.IntegerField()
  TRAILER = models.IntegerField()
  BYPASSED = models.IntegerField()
  RESPONSE_QUEUE = models.IntegerField()
  SOURCE_QUEUE = models.IntegerField()
  QUEUE = models.IntegerField()
  QUEUE_PRIORITY = models.IntegerField()
  DATE_CREATED = models.DateTimeField()
  DATE_ROUTED = models.DateTimeField()
  INPUT_FILE = models.IntegerField()
  OUTPUT_FILE = models.IntegerField()
  STATUS1 = models.IntegerField()
  STATUS2 = models.IntegerField()
  STATUS3 = models.IntegerField()
  USERID = models.CharField(max_length = 8)
  TMSTAMP = models.DateTimeField()

我想根据过去DATE_CREATED的筛选条件过滤过去3天

我正在使用Oracle数据库，但无法按日期进行过滤。

Answer 1

time_threshold = now - datetime.timedelta(hours=36)

一天有24个小时。因此36小时= 1.5天。如果要在最近三天进行过滤，则需要

timedelta(hours=72)

如何生成特定于Oracle的查询djang

1 个答案: