Класс BaseFormView (Django 2.1)

from django.views.generic.edit import BaseFormView

A base view for displaying a form.


  Defined in
extra_context = None ContextMixin
form_class = None FormMixin
http_method_names = ['get', 'post', 'put', 'patch', 'delete', 'head', 'options', 'trace'] View
initial = {} FormMixin
prefix = None FormMixin
success_url = None FormMixin


def _allowed_methods(self):
    return [m.upper() for m in self.http_method_names if hasattr(self, m)]

Основная точка входа процесса "запрос-ответ".

def as_view(cls, **initkwargs):
    """Main entry point for a request-response process."""
    for key in initkwargs:
        if key in cls.http_method_names:
            raise TypeError("You tried to pass in the %s method name as a "
                            "keyword argument to %s(). Don't do that."
                            % (key, cls.__name__))
        if not hasattr(cls, key):
            raise TypeError("%s() received an invalid keyword %r. as_view "
                            "only accepts arguments that are already "
                            "attributes of the class." % (cls.__name__, key))
    def view(request, *args, **kwargs):
        self = cls(**initkwargs)
        if hasattr(self, 'get') and not hasattr(self, 'head'):
            self.head = self.get
        self.request = request
        self.args = args
        self.kwargs = kwargs
        return self.dispatch(request, *args, **kwargs)
    view.view_class = cls
    view.view_initkwargs = initkwargs
    # take name and docstring from class
    update_wrapper(view, cls, updated=())
    # and possible attributes set by decorators
    # like csrf_exempt from dispatch
    update_wrapper(view, cls.dispatch, assigned=())
    return view
def dispatch(self, request, *args, **kwargs):
    # Try to dispatch to the right method; if a method doesn't exist,
    # defer to the error handler. Also defer to the error handler if the
    # request method isn't on the approved list.
    if request.method.lower() in self.http_method_names:
        handler = getattr(self, request.method.lower(), self.http_method_not_allowed)
        handler = self.http_method_not_allowed
    return handler(request, *args, **kwargs)

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())

Handle GET requests: instantiate a blank version of the form.

def get(self, request, *args, **kwargs):
    """Handle GET requests: instantiate a blank version of the form."""
    return self.render_to_response(self.get_context_data())

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)
def get_context_data(self, **kwargs):
    kwargs.setdefault('view', self)
    if self.extra_context is not None:
    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'):
            '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
def http_method_not_allowed(self, request, *args, **kwargs):
        'Method Not Allowed (%s): %s', request.method, request.path,
        extra={'status_code': 405, 'request': request}
    return HttpResponseNotAllowed(self._allowed_methods())

Конструктор. Вызывается в URLconf; может содержать полезные дополнительные ключевые аргументы и другие вещи.

def __init__(self, **kwargs):
    Constructor. Called in the URLconf; can contain helpful extra
    keyword arguments, and other things.
    # Go through keyword arguments, and either save their values to our
    # instance, or raise an error.
    for key, value in kwargs.items():
        setattr(self, key, value)

Обрабатывает ответы на запросы для запроса HTTP OPTIONS.

def options(self, request, *args, **kwargs):
    """Handle responding to requests for the OPTIONS HTTP verb."""
    response = HttpResponse()
    response['Allow'] = ', '.join(self._allowed_methods())
    response['Content-Length'] = '0'
    return response

Обработчик POST-запросов. Создает экземпляр формы из переданных POST переменных и проверяет их.

def post(self, request, *args, **kwargs):
    Handle POST requests: instantiate a form instance with the passed
    POST variables and then check if it's valid.
    form = self.get_form()
    if form.is_valid():
        return self.form_valid(form)
        return self.form_invalid(form)
def put(self, *args, **kwargs):
    return self.post(*args, **kwargs)