Is it possible to somehow adapt something similar to my problem?
I would like a list to appear in the form based on data from another list Select from the second field - filtering data - (contents) depending on the received values of the first field. For example. London Cafe London Restaurant London Fast Food Manchester Pizzeria Manchester Burgers
I select a city in the form field and the second field is filtered by establishments.
How to select from the second field in the form - filtering data depending on the values of the first field?
class ExcludedDateForm(ModelForm): class Meta: model = models.ExcludedDate exclude = ('user', 'recurring',) def __init__(self, user=None, **kwargs): super(ExcludedDateForm, self).__init__(**kwargs) if user: self.fields['category'].queryset = models.Category.objects.filter(user=user) class FilterByUserMixin(LoginRequiredMixin): """ Filters the queryset with `self.request.user` in a specified `user_field` field. `user_field` defaults to "user". """ user_field = "user" def get_queryset(self, *args, **kwargs): return ( super() .get_queryset(*args, **kwargs) .filter(**{self.user_field: self.request.user}) ) class Book(models.Model): author = models.ForeignKey(MyUser, on_delete=models.RESTRICT) number_pages = models.PositiveIntegerField() title = models.CharField(max_length=1000) class BookUpdateView(FilterByUserMixin, UpdateView): model = Book template_name = "book/my_book_update_template.html" fields = ["number_pages", "title"] success_url = reverse_lazy("book-update-success") user_field = "author" . . .. .. ........
