Filtering django DatetimeField__date not working

问题

According to this document that was added on v1.9 we can able to query a DateTimeField by date without time.

Examples are:

Entry.objects.filter(pub_date__date=datetime.date(2005, 1, 1))
Entry.objects.filter(pub_date__date__gt=datetime.date(2005, 1, 1))

But it is not working for me:

class MilkStorage(models.Model):
    ....

    created_at = models.DateTimeField(null=False)

Usage

from datetime import date
MilkStorage.objects.filter(created_at__date=date.today())

It returns an empty queryset <QuerySet []>.

Does this query only works on PostgreSQL? im using MySQL.

回答1:

Depending on your specific requirements, this may or may not be an ideal solution. I found that __date works if you set USE_TZ = False in settings.py

I had this same problem (I couldn't even filter by __month or __day) until I disabled USE_TZ. Again, may not be ideal for your case, but it should get __date working again.

回答2:

I have a visitor model. In this model I filtered data through date not time and it's working.

models.py

Visitor(models.Model):
    timestamp = models.DateTimeField(_('Login Date Time'), auto_now=True)
    os_info = models.CharField(_('OS Information'), max_length=30, null=True)

views.py

import datetime      
visitor = Visitor.objects.filter( timestamp__lte=datetime.datetime.now().date())
print visitor

Output:

<Visitor: Windows 10>, <Visitor: Windows 10>]

Use above way to filter data from date.

回答3:

You can use multiple ways to filter out based on date. Here are some of those

import datetime
custom_date = datetime.date(2005, 1, 1) 

Entry.objects.filter(pub_date__contains=custom_date) #Fastest in terms of performance

Entry.objects.filter(pub_date__startswith=custom_date)

Entry.objects.filter(pub_date__gte=custom_date)

来源：https://stackoverflow.com/questions/42701151/filtering-django-datetimefield-date-not-working

标签

django

django-models