Класс FormMixin (Django 2.2)

from django.views.generic.edit import FormMixin

Предоставляет возможность показать и обработать форму в запросе.

Диаграмма | Документация | Исходный код

Предки (MRO)

  1. FormMixin
  2. ContextMixin

Потомки

Атрибуты

  Определено в
extra_context = None ContextMixin
form_class = None FormMixin
initial = {} FormMixin
prefix = None FormMixin
success_url = None FormMixin

Методы

If the form is invalid, render the invalid form.

def form_invalid(self, form):
    """If the form is invalid, render the invalid form."""
    return self.render_to_response(self.get_context_data(form=form))

If the form is valid, redirect to the supplied URL.

def form_valid(self, form):
    """If the form is valid, redirect to the supplied URL."""
    return HttpResponseRedirect(self.get_success_url())
FormMixin

Insert the form into the context dict.

def get_context_data(self, **kwargs):
    """Insert the form into the context dict."""
    if 'form' not in kwargs:
        kwargs['form'] = self.get_form()
    return super().get_context_data(**kwargs)
ContextMixin
def get_context_data(self, **kwargs):
    kwargs.setdefault('view', self)
    if self.extra_context is not None:
        kwargs.update(self.extra_context)
    return kwargs

Return an instance of the form to be used in this view.

def get_form(self, form_class=None):
    """Return an instance of the form to be used in this view."""
    if form_class is None:
        form_class = self.get_form_class()
    return form_class(**self.get_form_kwargs())

Return the form class to use.

def get_form_class(self):
    """Return the form class to use."""
    return self.form_class

Return the keyword arguments for instantiating the form.

def get_form_kwargs(self):
    """Return the keyword arguments for instantiating the form."""
    kwargs = {
        'initial': self.get_initial(),
        'prefix': self.get_prefix(),
    }
    if self.request.method in ('POST', 'PUT'):
        kwargs.update({
            'data': self.request.POST,
            'files': self.request.FILES,
        })
    return kwargs

Return the initial data to use for forms on this view.

def get_initial(self):
    """Return the initial data to use for forms on this view."""
    return self.initial.copy()

Return the prefix to use for forms.

def get_prefix(self):
    """Return the prefix to use for forms."""
    return self.prefix

Return the URL to redirect to after processing a valid form.

def get_success_url(self):
    """Return the URL to redirect to after processing a valid form."""
    if not self.success_url:
        raise ImproperlyConfigured("No URL to redirect to. Provide a success_url.")
    return str(self.success_url)  # success_url may be lazy