16👍
Use a DateTimeField
instead (see this section in the docs). Conversion to a datetime.datetime
is handled for you by Django automatically.
A DateField
results in a datetime.date
and a datetime.time
object. You can use replace
to merge these values into an updated date
:
>>> today = datetime.datetime.today() >>> today datetime.datetime(2012, 3, 31, 11, 6, 5, 182371) >>> time = datetime.time(11, 30) >>> today.replace(hour=time.hour, minute=time.minute) datetime.datetime(2012, 3, 31, 11, 30, 5, 182371)
Note that the resulting date
has 11.30 as time now. Note also that today
is not modified, it simply computes a new date and time. As you can see, you now have to do the merging yourself because both values are stored in separate fields. That’s why a DateTimeField
is a much better choice, if you have the ability to modify the model’s fields.
6👍
You shoud add new field like a merge datetime field. Better for Performance.
event_full_datetime = models.DateTimeField()
fix old database. for shell like this script.
for obj in YourModel.objects.all():
obj.event_full_datetime = datetime.datetime( obj.event_date.year,obj.event_date.month, obj.event_date.day, obj.event_time.hour, obj.event_time.minut, obj.event_time.second)
obj.save()
3👍
If you need to store a NULL
(unknown) time then you can use datetime.combine
within a computed property:
from datetime import datetime, time
from django.db import models
class Event( models.Model ):
event_date = models.DateField()
event_time = models.TimeField( null = True )
@property
def event_datetime( self ):
"""The combined event_date and event_time (or midnight if unset)."""
return datetime.combine( self.event_date, self.event_time if self.event_time is not None else time.min )