I create a modelForm with instance to existing model (Book). I am not able to update the Books record. Adding a new record is fine but when I attempt to update, it appears to be unable to find the publisher (which is a foreign key). Error is "No Publisher matches the given query."
models.py
class Publisher(models.Model):
name = models.CharField(max_length=30)
address = models.CharField(max_length=50)
city = models.CharField(max_length=60)
state_province = models.CharField(max_length=30)
country = models.CharField(max_length=50)
website = models.URLField()
def __unicode__(self):
return self.name
class Meta:
ordering = ["name"]
class Author(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=40)
email = models.EmailField(blank=True, verbose_name='e-mail')
objects = models.Manager()
sel_objects=AuthorManager()
def __unicode__(self):
return self.first_name+' '+ self.last_name
class Book(models.Model):
title = models.CharField(max_length=100)
authors = models.ManyToManyField(Author)
publisher = models.ForeignKey(Publisher)
publication_date = models.DateField(blank=True, null=True)
num_pages = models.IntegerField(blank=True, null=True)
class BookForm(ModelForm):
class Meta:
model = Book
views.py
def authorcontactupd(request,id):
if request.method == 'POST':
a=Author.objects.get(pk=int(id))
form = AuthorForm(request.POST, instance=a)
if form.is_valid():
form.save()
return HttpResponseRedirect('/contact/created')
else:
a=Author.objects.get(pk=int(id))
form = AuthorForm(instance=a)
return render_to_response('author_form.html', {'form': form})
error msg
Page not found (404) Request Method: POST Request URL: http://127.0.0.1:8000/books/bookupd/
No Publisher matches the given query.
You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.
urls.py
from django.conf.urls.defaults import *
from django.views.generic.simple import direct_to_template
from mysite10.books.views import about_pages, books_by_publisher, authorcontact,bookcontact, booklisting, authorcontactupd
from django.views.generic import list_detail
from mysite10.books.models import Publisher, Book
from django.contrib import admin
admin.autodiscover()
def get_books():
return Book.objects.all()
publisher_info = {
'queryset': Publisher.objects.all(),
'template_name':'books/publisher_publisher_list_page.html',
'template_object_name': 'publisher',
'extra_context': {'book_list': Book.objects.all},
}
book_info = {
'queryset': Book.objects.order_by('-publication_date'),
'template_name':'books/publisher_publisher_list_page.html',
'template_object_name': 'book',
'extra_context': {'publisher_list': Publisher.objects.all},
}
oreilly_books = {
'queryset': Book.objects.filter(publisher__name="O'Reilly"),
'template_name':'books/publisher_publisher_list_page.html',
'template_object_name': 'book',
'extra_context': {'publisher_list': Publisher.objects.all},
}
urlpatterns = patterns('',
(r'^admin/(.*)', admin.site.root),
(r'^polls/', include('mysite10.polls.urls')),
(r'^search-form/$', 'mysite10.views.search_form'),
(r'^search/$', 'mysite10.views.search'),
(r'^contact/$', 'mysite10.contact.views.contact'),
(r'^contact/thanks2/(\d+)$', 'mysite10.contact.views.thanks2'),
(r'^contact/thanks/$', 'mysite10.contact.views.thanks'),
(r'^publishers/$', list_detail.object_list, publisher_info),
(r'^books/$', list_detail.object_list, book_info),
(r'^books/oreilly/$', list_detail.object_list, oreilly_books),
(r'^books/(\w+)/$', books_by_publisher),
(r'^author/$', authorcontact),
(r'^authorupd/(\d+)/$', authorcontactupd),
(r'^contact/created/$', 'mysite10.books.views.created'),
(r'^bookform/$', bookcontact),
(r'^contact/bookscreated/$', 'mysite10.books.views.books_created'),
(r'^booklist/$', 'mysite10.books.views.booklisting'),
(r'^books/bookupd/(\d+)$', 'mysite10.books.views.book_upd'),
)
-------------------------------------------------
I finally got it working with below codes. error in urls.py because of missing forward slash before $. Amended to (r'^books/bookupd/(\d+)/$'
views.py
def book_upd(request,id):
if request.method == 'POST':
a=Book.objects.get(pk=int(id))
form = BookForm(request.POST, instance=a)
if form.is_valid():
form.save()
return HttpResponseRedirect('/contact/bookscreated')
else:
a=Book.objects.get(pk=int(id))
form = BookForm(instance=a)
return render_to_response('book_form.html', {'form': form})
urls.py
(r'^books/bookupd/(\d+)/$', 'mysite10.books.views.book_upd'),