Question

我需要根据今天/明天的日期来过滤查询集并且可用字段是日期字段而不是日期时间字段

我正在使用自定义管理器来提供过滤结果

class CallbackReqManager(models.Manager):
def get_queryset(self):
    return super().get_queryset().filter()

def callbacktoday(self):
    today=date.today

    print(today)
    return self.filter(prefereddate=today)


class CallbackReq(models.Model):

    name    =   models.CharField(max_length=50)
    email   =   models.EmailField(max_length=254)
    query   =   models.CharField(max_length=150)
    preferedtime = models.TimeField(auto_now=False, auto_now_add=False)
    prefereddate = models.DateField(auto_now=False, auto_now_add=False)
    requestedon  = models.DateTimeField(auto_now_add=True)
    attended  =   models.BooleanField(default=False)  #   whether call back is met

    objects =   CallbackReqManager()

但是我得到

TypeError:  match = date_re.match(value)

TypeError: expected string or bytes-like object

Answer 1

您可能想这样写

today = date.today()

让我知道是否仍然出现某些错误。

Answer 2

您可以将新的经理添加到模型中，一个可以通过今天的日期进行过滤，另一个可以通过明天的数据进行过滤。这是一个例子

from datetime import date, timedalte
from django import models

class FilterByToday(models.Manager):
def get_queryset(self):
    """Filtering by today's date"""
    return super().get_queryset().filter(
        prefereddate=date.today()
    )

class FilterByTomorrow(models.Manager):
    """
    filtering by tomorrow's date
    where: date.today() + timedelta(days=1)
    is: Today + 1 day
    """
    def get_queryset(self):
        return super().get_queryset().filter(
            prefereddate=date.today() + timedalte(days=1)
        )


class CallbackReq(models.Model):

    name    =   models.CharField(max_length=50)
    email   =   models.EmailField(max_length=254)
    query   =   models.CharField(max_length=150)
    preferedtime = models.TimeField(auto_now=False, auto_now_add=False)
    prefereddate = models.DateField(auto_now=False, auto_now_add=False)
    requestedon  = models.DateTimeField(auto_now_add=True)
    attended  =   models.BooleanField(default=False)  #   whether call back is met
    # You can keep your default objects manager
    objects =   models.Manager()
    # Today's manager
    objects_today = FilterByToday()
    # Tomorrow's manager
    objects_tomorrow = FilterByTomorrow()

因此，在您的下一个代码中，您可以使用，例如：

# Return all the Model's records without using the custom managers
instance = CallbackReq.objects.all()
# Return all Model's records by filtering them by today's date
instance = CallbackReq.objects_today.all()
# Return all Model's records by filtering them by tomorrow's date
instance = CallbackReq.objects_tomorrow.all()

有关更多信息，请访问official documentation

如何在Django中基于Datefield过滤查询集？

2 个答案: