Django:UpdateView用于双嵌套表单

我目前在为双嵌套表单编写UpdateView时出错。我的架构由一个包含一个表单和两个表单集的模板组成。出版商有一个大表格。然后，用户可以向每个作者添加任意多的作者表单集，也可以向每个作者添加任意多的书籍表单集。所以它看起来像：

AuthorInlineFormSet = inlineformset_factory(
    Publisher,
    Author,
    fields="__all__",
    extra=1, 
    can_delete=False,
)

BookInlineFormSet = inlineformset_factory(
    Author,
    Book,
    fields="__all__",
    extra=1,
    can_delete=False,
)

class FormCreateView(CreateView):
    model = Publisher
    template_name = 'reservations/create.html'
    fields = "__all__"

    def form_valid(self, form):
        result = super(FormCreateView, self).form_valid(form)

        authors_count = 0
        authors_formset = AuthorInlineFormSet(form.data, instance=self.object, prefix='authors_formset')
        if authors_formset.is_valid():
            authors = authors_formset.save()

            for author in authors:
                books_formset = BookInlineFormSet(form.data, instance=author, prefix='books_formset_%s' % authors_count)
                if books_formset.is_valid():
                    books_formset.save()
                authors_count += 1
        return result

    def get_context_data(self, **kwargs):
        context = super(FormCreateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(prefix='authors_formset')
        context['books_formset'] = BookInlineFormSet(prefix='books_formset_0')
        return context

class FormUpdateView(UpdateView):
    model = Publisher 
    template_name = 'reservations/create.html'
    fields = "__all__"

    def get_success_url(self):
        return reverse_lazy('reservations:dashboard')

    def get_object(self, *kargs, **kwargs):
        request = get_object_or_404(Publisher, pk=self.kwargs['pk'])

        return request

    def get_context_data(self, **kwargs):
        context = super(FormUpdateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_count = 0
        authors_formset = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_formset = authors_formset.queryset
        for author in authors_formset:
            context['books_formset'] = BookInlineFormSet(instance=author, prefix='books_formset_%s' % authors_count)
        return context 

• Publisher->Author1，Author2，Author3
• Author1->Book1，Book2，Book3
• 作者2->Book4
• 作者3->Book5，Book6

同样，这些都列在一个create.html模板中。我用CreateView写的，效果很好。现在写UpdateView， 我重定向到我的html模板以创建表单，并且可以使用publisher和author的数据正确填充表单。但是，当我尝试用图书数据填充表单时，它会用相同的图书实例填充每个author实例，而不是用匹配的图书实例填充每个author实例。所以它看起来像：

AuthorInlineFormSet = inlineformset_factory(
    Publisher,
    Author,
    fields="__all__",
    extra=1, 
    can_delete=False,
)

BookInlineFormSet = inlineformset_factory(
    Author,
    Book,
    fields="__all__",
    extra=1,
    can_delete=False,
)

class FormCreateView(CreateView):
    model = Publisher
    template_name = 'reservations/create.html'
    fields = "__all__"

    def form_valid(self, form):
        result = super(FormCreateView, self).form_valid(form)

        authors_count = 0
        authors_formset = AuthorInlineFormSet(form.data, instance=self.object, prefix='authors_formset')
        if authors_formset.is_valid():
            authors = authors_formset.save()

            for author in authors:
                books_formset = BookInlineFormSet(form.data, instance=author, prefix='books_formset_%s' % authors_count)
                if books_formset.is_valid():
                    books_formset.save()
                authors_count += 1
        return result

    def get_context_data(self, **kwargs):
        context = super(FormCreateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(prefix='authors_formset')
        context['books_formset'] = BookInlineFormSet(prefix='books_formset_0')
        return context

class FormUpdateView(UpdateView):
    model = Publisher 
    template_name = 'reservations/create.html'
    fields = "__all__"

    def get_success_url(self):
        return reverse_lazy('reservations:dashboard')

    def get_object(self, *kargs, **kwargs):
        request = get_object_or_404(Publisher, pk=self.kwargs['pk'])

        return request

    def get_context_data(self, **kwargs):
        context = super(FormUpdateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_count = 0
        authors_formset = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_formset = authors_formset.queryset
        for author in authors_formset:
            context['books_formset'] = BookInlineFormSet(instance=author, prefix='books_formset_%s' % authors_count)
        return context 

• Publisher->Author1，Author2，Author3
• Author1->Book1，Book2，Book3
• Author2->Book1，Book2，Book3
• Author3->Book1，Book2，Book3

My models.py看起来像：

class Publisher(models.Model):
    name = models.CharField(max_length=255, unique=True)

class Author(models.Model):
    name = models.CharField(max_length=255, unique=True) 
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)

class Book(models.Model):
    title = models.CharField(max_length=255, unique=True)
    author = models.ForeignKey(Author, on_delete=models.CASCADE) 

My forms.py看起来像：

AuthorInlineFormSet = inlineformset_factory(
    Publisher,
    Author,
    fields="__all__",
    extra=1, 
    can_delete=False,
)

BookInlineFormSet = inlineformset_factory(
    Author,
    Book,
    fields="__all__",
    extra=1,
    can_delete=False,
)

class FormCreateView(CreateView):
    model = Publisher
    template_name = 'reservations/create.html'
    fields = "__all__"

    def form_valid(self, form):
        result = super(FormCreateView, self).form_valid(form)

        authors_count = 0
        authors_formset = AuthorInlineFormSet(form.data, instance=self.object, prefix='authors_formset')
        if authors_formset.is_valid():
            authors = authors_formset.save()

            for author in authors:
                books_formset = BookInlineFormSet(form.data, instance=author, prefix='books_formset_%s' % authors_count)
                if books_formset.is_valid():
                    books_formset.save()
                authors_count += 1
        return result

    def get_context_data(self, **kwargs):
        context = super(FormCreateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(prefix='authors_formset')
        context['books_formset'] = BookInlineFormSet(prefix='books_formset_0')
        return context

class FormUpdateView(UpdateView):
    model = Publisher 
    template_name = 'reservations/create.html'
    fields = "__all__"

    def get_success_url(self):
        return reverse_lazy('reservations:dashboard')

    def get_object(self, *kargs, **kwargs):
        request = get_object_or_404(Publisher, pk=self.kwargs['pk'])

        return request

    def get_context_data(self, **kwargs):
        context = super(FormUpdateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_count = 0
        authors_formset = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_formset = authors_formset.queryset
        for author in authors_formset:
            context['books_formset'] = BookInlineFormSet(instance=author, prefix='books_formset_%s' % authors_count)
        return context 

My views.py看起来像：

AuthorInlineFormSet = inlineformset_factory(
    Publisher,
    Author,
    fields="__all__",
    extra=1, 
    can_delete=False,
)

BookInlineFormSet = inlineformset_factory(
    Author,
    Book,
    fields="__all__",
    extra=1,
    can_delete=False,
)

class FormCreateView(CreateView):
    model = Publisher
    template_name = 'reservations/create.html'
    fields = "__all__"

    def form_valid(self, form):
        result = super(FormCreateView, self).form_valid(form)

        authors_count = 0
        authors_formset = AuthorInlineFormSet(form.data, instance=self.object, prefix='authors_formset')
        if authors_formset.is_valid():
            authors = authors_formset.save()

            for author in authors:
                books_formset = BookInlineFormSet(form.data, instance=author, prefix='books_formset_%s' % authors_count)
                if books_formset.is_valid():
                    books_formset.save()
                authors_count += 1
        return result

    def get_context_data(self, **kwargs):
        context = super(FormCreateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(prefix='authors_formset')
        context['books_formset'] = BookInlineFormSet(prefix='books_formset_0')
        return context

class FormUpdateView(UpdateView):
    model = Publisher 
    template_name = 'reservations/create.html'
    fields = "__all__"

    def get_success_url(self):
        return reverse_lazy('reservations:dashboard')

    def get_object(self, *kargs, **kwargs):
        request = get_object_or_404(Publisher, pk=self.kwargs['pk'])

        return request

    def get_context_data(self, **kwargs):
        context = super(FormUpdateView, self).get_context_data(**kwargs)
        context['authors_formset'] = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_count = 0
        authors_formset = AuthorInlineFormSet(instance=self.object, prefix='authors_formset')
        authors_formset = authors_formset.queryset
        for author in authors_formset:
            context['books_formset'] = BookInlineFormSet(instance=author, prefix='books_formset_%s' % authors_count)
        return context 

现在，如果我要打印UpdateView的get_context_数据的for循环中的context['books_formset'，它会正确地打印出每个作者的匹配书籍表单集，所以它会打印出来（Book5，Book6），（Book4），然后（Book1，Book2，Book3）。因此，我知道它可以正确地为每个作者实例找到相应的书籍实例。但是，它会将所有书籍实例写入Book1、Book2、Book3，这样每个作者都有Book1、Book2、Book3。我不太确定如何解决这个问题，如果有任何帮助，我将不胜感激！非常感谢你