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22 feb 2017 · The Django issue tracker has the remarkable entry #5763, titled "Queryset doesn't have a "not equal" filter operator". It is remarkable because (as of April 2016) it was "opened 9 years ago" (in the Django stone age), "closed 4 years ago", and "last changed 5 months ago". Read through the discussion, it is interesting.
24 giu 2011 · It is possible that you have two different versions of Django, one for each version of python. In from a Unix/Mac terminal, you can check your Python version as follows: $ python --version. If you want to know the source: $ which python. And to check the version of Django: $ python -m django --version.
13 mag 2016 · In Django, what's the difference between the following two: Article.objects.values_list('comment_id', flat=True).distinct() versus: Article.objects.values('comment_id').distinct() My goal is to get a list of unique comment ids under each Article. I've read the documentation (and in fact have used both approaches). The results overtly seem similar.
I want to be able to list the items that either a user has added (they are listed as the creator) or the item has been approved. So I basically need to select: item.creator = owner or item.modera...
19 mag 2012 · DJANGO_DEVELOPMENT=true python manage.py runserver At the bottom of your settings.py file, add the following. # Override production variables if DJANGO_DEVELOPMENT env variable is true if os.getenv('DJANGO_DEVELOPMENT') == 'true': from settings_dev import * # or specific overrides (Note that importing * should generally be avoided in Python)
4 lug 2011 · Django querysets are lazy. That means a query will hit the database only when you specifically ask for the result. So until you print or actually use the result of a query you can filter further with no database access. As you can see below your code only executes one sql query to fetch only the last 10 items.
28 giu 2012 · Given a url pattern, Django uses url() to pick the right view and generate a page. That is, url--> view name. But sometimes, like when redirecting, you need to go in the reverse direction and give Django the name of a view, and Django generates the appropriate url. In other words, view name --> url.
from django.core import serializers from django.http import HttpResponse def your_view(request): data = serializers.serialize('json', YourModel.objects.all()) return HttpResponse(data, content_type='application/json') Bonus for Vue Users. If you want to bring your Django Queryset into Vue, you can do the following. template.html
received_json_data=json.loads(request.POST['data']) #received_json_data=json.loads(request.body) return StreamingHttpResponse('it was post request: '+str(received_json_data)) return StreamingHttpResponse('it was GET request') I am posting JSON data using requests module. r.text should print that message and posted data but I am not able to ...
It will be automatically generated by Django for you. We only need to define a foreignKey in the related table. In other words, we only need to define ManyToOne relation by using foreignKey. class Car(models.Model): # wheels = models.oneToMany() to get wheels of this car [**it is not required to define**].
