Класс FormMixin (Django 3.2)
from django.views.generic.edit import FormMixin
Provide a way to show and handle a form in a request.
Ancestors (MRO)
- FormMixin
- ContextMixin
Attributes
Defined in | |
---|---|
extra_context = None
|
ContextMixin |
form_class = None
|
FormMixin |
initial = {}
|
FormMixin |
prefix = None
|
FormMixin |
success_url = None
|
FormMixin |
Methods
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