Python-сообщество

class Book(models.Model):
    title = models.CharField(max_length=100, verbose_name='Название')
    authors = models.ManyToManyField(Author, verbose_name='Автор')
    publisher = models.ForeignKey(Publisher, verbose_name='Издательство')
    publication_date = models.DateField(blank=True, null=True,\
        verbose_name='Дата издания')
    class Admin:
        pass
    def __unicode__(self):
        return self.title
        
class Order(models.Model):
    book = models.ForeignKey(Book, verbose_name='Книга')
    count = models.PositiveIntegerField(verbose_name='Кол-во')
    title = models.ForeignKey(OrderDetail, verbose_name='Название заказа')
    user = models.ForeignKey(User)
    class Admin:
        pass
    def __unicode__(self):
        return u'%s' % self.book

class PartialOrderForm(OrderForm):
    """Форма редактирования книг в заявках"""
    class Meta(OrderForm.Meta):
        exclude = ('title', 'user')

    def cleaned_data():
        pass

def order_add_book(request, order_id, book_id = None):
    if book_id:#редактируем книгу в заявке
        order = get_object_or_404(Order, pk=order_id)
        if request.method == 'POST':
            form = PartialOrderForm(request.POST, instance=order)
            if form.is_valid():
                form.save()
                return HttpResponseRedirect('order/edit/%s/'%order_id)
        else:
            form = OrderForm(instance=order)
    else:#добавляем новую книгу
        if request.method == 'POST':
            #order определяем только для формы со скрытыми полями
            #form = OrderForm(request.POST)заменили на
            order_detail = OrderDetail(id = order_id)
            user = User (id = request.user.id)#текущий пользователь
            order = Order(title = order_detail, user = user) 
            form = PartialOrderForm(request.POST, instance = order )
            if form.is_valid():
                new_book = form.save()
                return HttpResponseRedirect('/order/edit/%s/'%order_id)
        else:            
            form = PartialOrderForm()
    return render_to_response('books/order_form.html', {'form': form})

books = Book.objects.exclude(id__in = [1,2,3])

form = PartialOrderForm()
form.fields['bookz']=forms.ModelChoiceField(queryset=Book.objects.exclude(id__in = [1,2,3]))