django-queryset

Foo.objects.all().distinct('foo') won't remove duplicates Foo.objects.all().order_by().distinct('foo') does remove them. I have Meta.ordering = ('-field1', '-field2) Does Foo.objects.all().order_by().distinct('foo') respects the Meta.ordering? i.e. I want distinct values ordered by Meta.ordering and not sure how to do it. Django Documentation is confusing and don't address how order_by() without any argument works. I'm using postgresql 9.3 btw. In [28]: BestMomsdiaryThread.objects.all().values_list('momsdiary_thread__id', flat=True) Out[28]: [3390, 5877, 5884, 6573, 5880, 6576, 6576, 6576,

I have this model which maps to a postgresql view class AppModel(models.Model): nbr = models.BigIntegerField(blank=True, null=True) region = models.ForeignKey(AppWilaya,blank=True, null=True) date_preorder = models.DateField(blank=True, null=True) id = models.IntegerField(primary_key=True,blank=True, db_column='dummy_id') What I want to achieve is to sum "nbr" by "region" , so: class AppModelAdmin(admin.ModelAdmin): .... def queryset(self, request): qs = super(AppModelAdmin, self).get_queryset(request) qs=qs.values("region").annotate(total=Sum( 'nbr')) But Django Admin seems not accepting

I'm trying to count the dates users register from a DateTime field. In the database this is stored as '2016-10-31 20:49:38' but I'm only interested in the date '2016-10-31'. The raw SQL query is: select DATE(registered_at) registered_date,count(registered_at) from User where course='Course 1' group by registered_date; It is possible using 'extra' but I've read this is deprecated and should not be done. It works like this though: User.objects.all() .filter(course='Course 1') .extra(select={'registered_date': "DATE(registered_at)"}) .values('registered_date') .annotate(**{'total': Count(

is there any way of doing the following Unicorn.objects.or_filter(magical=True).or_filter(unicorn_length=15).or_filter(skin_color='White').or_filter(skin_color='Blue') where or_filter stands for an isolated match I remember using something similar but cannot find the function anymore! Help would be great! Thanks :) You're looking for Q objects . 来源： https://stackoverflow.com/questions/2964540/is-there-an-or-filter-django

I am writing a web based music application and I want implement some feature that user can see most favor album in last week-month-year. so this is my model : class album(models.Model): def get_weely_count(): ... def get_monthly_count(): ... def get_yearly_count(): ... class like(models.Model): created_at = models.DateField() albumID = models.ForeignKey(Album) Now I want to receive albums that most liked in last week or last month or last year,I want done some thing like this(but I can not): Album.objects.all().order_by('get_weekly_count') can any one help me to fix it or give another approach

Hi I am writing a Django view which ouputs data for graphing on the client side (High Charts). The data is climate data with a given parameter recorded once per day. My query is this: format = '%Y-%m-%d' sd = datetime.datetime.strptime(startdate, format) ed = datetime.datetime.strptime(enddate, format) data = Climate.objects.filter(recorded_on__range = (sd, ed)).order_by('recorded_on') Now, as the range is increased the dataset obviously gets larger and this does not present well on the graph (aside from slowing things down considerably). Is there an way to group my data as averages in time

I'm making an "infinite"/continuous scrolling list (like twitter) and want to be able to navigate to a specific item. Finding the item is straight forward, but I need to get a few items before and after it. I'm using a similar approach to the answers suggested here: Getting next and previous objects in Django before = list(reversed(models.MyModel.objects.filter(pk__lt=pk).order_by('-pk')[:10])) after = list(models.MyModel.objects.filter(pk__gte=pk).order_by('pk')[:11]) objects = before + after Is there any way to combine these into the one query? I can't simply combine the two with the |