如何在Django中基于Datefield过滤查询集？

Question

I need to filter queryset based on today/tommorows date and the field available is a date field not datetime field

I am using custom manager for providing filtered result

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()

but I am getting

TypeError:  match = date_re.match(value)

TypeError: expected string or bytes-like object

Answer 1

You may want to write like this

today = date.today()

Let me know if some error still occurs.

Answer 2

You can add to new managers to your models, one for filtring by today's date and the other is by tomorrow's data. Here is an example

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()

So, in your next code you can use, for example:

# 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()

For more informations visit the official documentation