django order_by query set, ascending and descending
2016年6月10日 · How can I order by descending my query set in django by date? Reserved.objects.all().filter(client=client_id).order_by('check_in') I just want to filter from descending all the Reserved by check_in
python - Django - Changing order_by on click - Stack Overflow
Using Django and I would like to change the order of the display of the objects on click without refreshing the page. my model class IndexView(generic.ListView): template_name = 'movies/index...
Django order_by specific order - Stack Overflow
2012年4月26日 · I've find this way being very useful also when combining the custom_order with additional ordering from other fields in the model, e.g. .order_by('custom_order', '-created_at') – msonsona Commented Apr 27, 2021 at 10:09
python - Django custom order_by - Stack Overflow
2016年1月5日 · Force evaluation of a QuerySet by calling list() on it. Be warned, though, that this could have a large memory overhead, because Django will load each element of the list into memory. In contrast, iterating over a QuerySet will take advantage of your database to load data and instantiate objects only as you need them. Django doc –
Sort order of Django Admin records - Stack Overflow
2023年3月18日 · An interesting problem with this: let's say you order users with: ordering = ('-last_login',), which can be null, i.e. the user never logged in. But you are interested in the most recent users, so the null last_login users appearing ahead of …
Django models: add index on date, desc order - Stack Overflow
If you are only ordering by a single column then using Django's ordering with Postgres is not necessarily expensive. The Postgres planner/optimizer will decide [2, 3] whether to use indices or a full table scan and sort to form the relation. To only perform ordering on a single QuerySet basis you can use the order_by [1] method. From the Django ...
python - Django - Ordering by a foreign key - Stack Overflow
2016年10月2日 · from collections import OrderedDict qs = Movie.objects.order_by('-trailer__date') movies = OrderedDict() for x in qs: if x.id not in movies: movies[x.id] = x movies = movies.values() It was unclear what order you wanted the movies in when they had multiple trailers, so I guessed it was based on the earliest trailer.
Can I remove ORDER BY from a Django ORM query?
2016年6月10日 · Actually, just do a query.order_by() is enough. This is specified in the docs although it is a bit hard to find. The docs say: If you don’t want any ordering to be applied to a query, not even the default ordering, call order_by() with no parameters. Here is the implementation of order_by, for your reference -
Django : Count, Group By and Order By with many to many fied
2018年8月7日 · Here actor #1 played in movies #1, #2 and #3. And actor #2 played only in movie #1. Here is the request used in MySQL to get what I want : SELECT actors_id, COUNT(movies_id) as count FROM movies_movies_casting GROUP BY actors_id ORDER BY count; The result is :
python - Is there Django List View model sort? - Stack Overflow
@DeA Overriding get_queryset and using order_by should work, although with ListView you might prefer to override ordering or get_ordering instead. – Alasdair Commented Mar 9, 2017 at 15:13