I have a model with a datetime field:
class MyModel(models.Model):
created = models.DateTimeField(auto_now = True)
I want to get all the records created today.
I tried:
MyModel.objects.all().filter(created = timezone.now())
and
MyModel.objects.all().filter(created = timezone.now().date())
But always got an empty set. What is the correct way in Django to do this?
EDIT:
It looks strange, but a record, created today (06.04.2012 23:09:44) has date (2012-04-07 04:09:44) in the database. When I'm trying to edit it in the admin panel it looks correct (06.04.2012 23:09:44). Does Django handle it somehow?
Since somewhere in 2015:
YourModel.objects.filter(some_datetime__date=some_date)
i.e. __date after the datetime field.
https://code.djangoproject.com/ticket/9596
There may be a more proper solution, but a quick workup suggests that this would work:
from datetime import timedelta
start_date = timezone.now().date()
end_date = start_date + timedelta( days=1 )
Entry.objects.filter(created__range=(start_date, end_date))
I'm assuming timezone is a datetime-like object.
The important thing is that you're storing an exact time, down to the millisecond, and you're comparing it to something that only has accuracy to the day. Rather than toss the hours, minutes, and seconds, django/python defaults them to 0. So if your record is createed at 2011-4-6T06:34:14am, then it compares 2011-4-6T:06:34:14am to 2011-4-6T00:00:00, not 2011-4-6 (from created date) to 2011-4-6 ( from timezone.now().date() ). Helpful?
Try this
from datetime import datetime
now=datetime.now()
YourModel.objects.filter(datetime_published=datetime(now.year, now.month, now.day))
Related
in my django website i need to make query based on datetime filed that are smaller than now this is my query in views.py :
meetings=Meeting.objects.filter(date_time__lt=datetime.now()).filter(Q(members_email__icontains=str(request.user.email))|Q(host=request.user))
and this is datetime filed in models.py :
date_time = models.DateTimeField(null=True,blank=True)
but it returns nothing i don't know how to solve this problem
any suggestion?
I am trying to retrieve data older then 10 days to update that field data. Currently my model is like
class Restaurant(models.Model):
is_approved = models.BooleanField(null=False, default=False)
timestamp = models.DateTimeField(auto_now_add=True)
My database table is
Now when I query the database:
dish = Restaurant.objects.filter(timestamp__gt=datetime.now() - timedelta(days=10))
I get the whole table's data. I even tried to change from a day to 1 day. It still is a full database result.
If you want data that is older then you probably need to use __lt instead of __gt.
import datetime
from django.utils import timezone as tz
d = tz.now() - datetime.timedelta(days=10)
dish = Restaurant.objects.filter(timestamp__lt=d)
Django recomends using timezone.now() instead of datetime.now() to make sure that the timezone info is correct.
This is absolutely just a mistake. Try timestamp__lt for older results. timestamp__gt is recording records for newer results. I asked you to try 1 minute for gt, and it worked. That should display the whole database because all of these are older than 1 min. And also, as said, Django recommends timezone.now() instead of datetime.now(). So you made a error, why timestamp__lt returns the whole database for 10 days is because all posts are less than 10 days old. But lt returns nothing for 1 minute because all of the data is older than 1 minute.
I'm developing a Django app for logging dives and each dive has a datetime and a timezone in it. I'm using the django-timezone-field app for the timezone.
class Dive(models.Model):
...
date_time_in = models.DateTimeField(default=timezone.now)
timezone = TimeZoneField(default=timezone.get_current_timezone_name())
So the user is able to enter a datetime string ("2016-07-11 14:00") and select a timezone ("Asia/Bangkok" - UTC+0700), I then set the timezone of the datetime to the one given in my view like this:
def log_dive(request):
if request.method == 'POST':
form = DiveForm(request.POST)
if form.is_valid():
dive = form.save(commit=False)
date = dive.date_time_in
date = date.replace(tzinfo=None)
dive.date_time_in = dive.timezone.localize(date)
dive.save()
The database then stores the datetime as UTC in the database (SELECT statement gives it in my local timezone):
# SELECT date_time_in, timezone FROM divelog_dive ORDER BY number DESC;
date_time_in | timezone
------------------------+------------------
2014-07-11 17:00:00+10 | Asia/Bangkok
Now there are two things I'm struggling with:
1) I want to display the dates in the given timezone, however I can't seem to stop it defaulting to the TIME_ZONE setting.
2) If the user edits the record, the time displayed in the edit field should be the one they originally entered (14:00), instead it's showing it in the current timezone (17:00).
Check your timezone setting in settings.py
Do you have USE_TZ = true in your settings file? If you created your app using the djangoadmin-startproject command, it is set by default.
Also, I struggled with timezones at my last job but found that using pytz really helped. Have you tried that package yet?
EDIT: Ok man I may be way off, but since noone else has answered and I feel the timezone struggle, here is something I noticed...
You are replacing the date object with tz_info=None, but wouldn't you want to instead replace that with the timezone from the database? So you would get that timezone and do a replace using the valid format (tzinfo=blah...)?
Like I said I may be way off but if that helps there you go.
Sorry, I don't think I explained my problem very well. I finally figured this out, so I'll answer my own question.
1) turned out to be easy, Django have a template tag for displaying times in a given zone:
{{ dive.date_time_in|timezone:dive.timezone|date:"Y-m-d H:i e" }}
For 2), I came across [1] which lead me to this solution: In the view, after getting the object from the database, I use astimezone(...) to convert the date value (which the DB stores as UTC) into the given timezone. I then use replace(tzinfo=None) to make it naive and then it displays correctly on my form.
def edit_dive(request, dive_id=None):
dive = None
if dive_id != None:
dive = get_object_or_404(Dive, pk=dive_id)
local_date = dive.date_time_in.astimezone(timezone(str(dive.timezone)))
dive.date_time_in = local_date.replace(tzinfo=None)
[1] http://www.saltycrane.com/blog/2009/05/converting-time-zones-datetime-objects-python/
I have a datetime field.
date = models.DateTimeField()
Im trying to do a query set for all the entries on that date and then order it by time. I get all the entries like this...
todays_entries = model.objects.filter(date__range=(start_date, end_date))
I understand if I wanted to order it by date i would add a order_by('date') method but the time is still all off in terms of the order...how can I go about ordering the time?
I am trying to read a date of format DD-MM-YYYY format from HTML and Compare it with the datetime field named as widget_created_at in my model.
if data["field"] == "widget_created_at":
date = datetime.strptime(data["data"], "%d-%m-%Y").date()
if data["option"] == "before":
filter_query = Q(widget_created_at__lt=date)
Then whenever this query is used for filtering in the below code
blogs = blogs.filter(filter_query)
RunTime warning for naive datetime appears. I tried every solution i found from here and google but the Error is still there. Please tell me how to avoid it.
Thanks
The date you are creating for your filter has no timezone.
Have you looked at pytz to "localize" the filter date? This would allow you to add a timezone to the filter date?