Thanks Mike. The issue is the inflexible handling of fk entries of a model by the django serializer or more accurately PythonSerializer. The behavior is inherited by json and xml serializers the same. I've eventually resorted to rewriting the whole serialization to make it a better fit for my ajax style front-ends but I guess it may take a while before I can come up with a fully configurable and robust framework as the serialization code should serialize into the output stream directly rather than building the whole object tree and creating a giant string before even touching the output stream.
BTW, I like your idea of JSONResponse, it makes the code neat and readable. On Sep 1, 7:25 pm, Mike Ramirez <gufym...@gmail.com> wrote: > On Tuesday 01 September 2009 12:29:56 pm Amir Habibi wrote: > > > How can I serialize a Queryset along with the related records. For > > example, in Poll and Choice case, I need each poll to have the choices > > encoded in json format. > > > Thanks > > you'll want to look at the docs on serialization [1], it is pretty straight > forward, though the examples use 'xml', it does output to json data (among > other formats) also. > > http://docs.djangoproject.com/en/dev/topics/serialization/ > > It's quite simple to use, in my examples I'm using FAQ Categories and Question > and Answers within a category. > > In [1]: from django.core import serializers > > In [2]: from base.models import FAQC > FAQCategory FAQCategoryManager > > In [2]: from base.models import FAQCategory, FAQ > FAQ FAQCategory FAQCategoryManager > > In [2]: from base.models import FAQCategory, FAQ > > In [3]: cat = FAQ > FAQ FAQCategory > > In [3]: cat = FAQCategory.objects.all().get(pk=1) > > In [4]: cat > Out[4]: <FAQCategory: General Questions> > > In [5]: faqs = FAQ.objects.all().filter(category=cat) > > In [6]: faqs > Out[6]: [<FAQ: General Questions - 1. Why?>] > > In [7]: json = serializers.serialize('json', faqs) > > In [8]: json > Out[8]: '[{"pk": 1, "model": "base.faq", "fields": {"answer": "Because I want > to.", "category": 1, "question": "Why?", "number": 1, "slug": "why"}}]' > > you can also extend HttpResponse to return a JsonResponse: > > # as seen on:http://toys.jacobian.org/presentations/2007/oscon/tutorial/#s67 > class JSONResponse(HttpResponse): > def __init__(self, data): > HttpResponse.__init__(self, data, mimetype="application/json") > > In your view code just return this, using the serialized data from above: > > def ajaxview(request): > cat = FAQCategory.objects.all().get(pk=1) > faqs = FAQ.objects.all().filter(category=cat) > json = serializers.serialize('json', faqs) > return JSONResponse(json) > > hope this helps, > > Mike > -- > War is peace. Freedom is slavery. Ketchup is a vegetable. > > signature.asc > < 1KViewDownload --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
