Django.fun ☰

Класс ModelFormMixin (Django 2.1)

from django.views.generic.edit import ModelFormMixin

Provide a way to show and handle a ModelForm in a request.

Диаграмма | Documentation | Исходный код

Предки (MRO)

  1. ModelFormMixin
  2. FormMixin
  3. SingleObjectMixin
  4. ContextMixin

Атрибуты

  Определено в
context_object_name = None SingleObjectMixin
extra_context = None ContextMixin
fields = None ModelFormMixin
form_class = None FormMixin
initial = {} FormMixin
model = None SingleObjectMixin
pk_url_kwarg = 'pk' SingleObjectMixin
prefix = None FormMixin
queryset = None SingleObjectMixin
query_pk_and_slug = False SingleObjectMixin
slug_field = 'slug' SingleObjectMixin
slug_url_kwarg = 'slug' SingleObjectMixin
success_url = None FormMixin

Методы

If the form is invalid, render the invalid form.
59
60
61
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))
ModelFormMixin
If the form is valid, save the associated model.
123
124
125
126
def form_valid(self, form):
    """If the form is valid, save the associated model."""
    self.object = form.save()
    return super().form_valid(form)
FormMixin
If the form is valid, redirect to the supplied URL.
55
56
57
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.
63
64
65
66
67
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)
SingleObjectMixin
Insert the single object into the context dict.
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
def get_context_data(self, **kwargs):
    """Insert the single object into the context dict."""
    context = {}
    if self.object:
        context['object'] = self.object
        context_object_name = self.get_context_object_name(self.object)
        if context_object_name:
            context[context_object_name] = self.object
    context.update(kwargs)
    return super().get_context_data(**context)
ContextMixin
23
24
25
26
27
def get_context_data(self, **kwargs):
    kwargs.setdefault('view', self)
    if self.extra_context is not None:
        kwargs.update(self.extra_context)
    return kwargs

Get the name to use for the object.
82
83
84
85
86
87
88
89
def get_context_object_name(self, obj):
    """Get the name to use for the object."""
    if self.context_object_name:
        return self.context_object_name
    elif isinstance(obj, models.Model):
        return obj._meta.model_name
    else:
        return None

Return an instance of the form to be used in this view.
29
30
31
32
33
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())
ModelFormMixin
Return the form class to use in this view.
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
def get_form_class(self):
    """Return the form class to use in this view."""
    if self.fields is not None and self.form_class:
        raise ImproperlyConfigured(
            "Specifying both 'fields' and 'form_class' is not permitted."
        )
    if self.form_class:
        return self.form_class
    else:
        if self.model is not None:
            # If a model has been explicitly provided, use it
            model = self.model
        elif getattr(self, 'object', None) is not None:
            # If this view is operating on a single object, use
            # the class of that object
            model = self.object.__class__
        else:
            # Try to get a queryset and extract the model class
            # from that
            model = self.get_queryset().model
        if self.fields is None:
            raise ImproperlyConfigured(
                "Using ModelFormMixin (base class of %s) without "
                "the 'fields' attribute is prohibited." % self.__class__.__name__
            )
        return model_forms.modelform_factory(model, fields=self.fields)
FormMixin
Return the form class to use.
25
26
27
def get_form_class(self):
    """Return the form class to use."""
    return self.form_class
ModelFormMixin
Return the keyword arguments for instantiating the form.
103
104
105
106
107
108
def get_form_kwargs(self):
    """Return the keyword arguments for instantiating the form."""
    kwargs = super().get_form_kwargs()
    if hasattr(self, 'object'):
        kwargs.update({'instance': self.object})
    return kwargs
FormMixin
Return the keyword arguments for instantiating the form.
35
36
37
38
39
40
41
42
43
44
45
46
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.
17
18
19
def get_initial(self):
    """Return the initial data to use for forms on this view."""
    return self.initial.copy()

Return the object the view is displaying.

Require `self.queryset` and a `pk` or `slug` argument in the URLconf.
Subclasses can override this to return any object.
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
def get_object(self, queryset=None):
    """
    Return the object the view is displaying.
    Require `self.queryset` and a `pk` or `slug` argument in the URLconf.
    Subclasses can override this to return any object.
    """
    # Use a custom queryset if provided; this is required for subclasses
    # like DateDetailView
    if queryset is None:
        queryset = self.get_queryset()
    # Next, try looking up by primary key.
    pk = self.kwargs.get(self.pk_url_kwarg)
    slug = self.kwargs.get(self.slug_url_kwarg)
    if pk is not None:
        queryset = queryset.filter(pk=pk)
    # Next, try looking up by slug.
    if slug is not None and (pk is None or self.query_pk_and_slug):
        slug_field = self.get_slug_field()
        queryset = queryset.filter(**{slug_field: slug})
    # If none of those are defined, it's an error.
    if pk is None and slug is None:
        raise AttributeError(
            "Generic detail view %s must be called with either an object "
            "pk or a slug in the URLconf." % self.__class__.__name__
        )
    try:
        # Get the single item from the filtered queryset
        obj = queryset.get()
    except queryset.model.DoesNotExist:
        raise Http404(_("No %(verbose_name)s found matching the query") %
                      {'verbose_name': queryset.model._meta.verbose_name})
    return obj

Return the prefix to use for forms.
21
22
23
def get_prefix(self):
    """Return the prefix to use for forms."""
    return self.prefix

Return the `QuerySet` that will be used to look up the object.

This method is called by the default implementation of get_object() and
may not be called if get_object() is overridden.
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
def get_queryset(self):
    """
    Return the `QuerySet` that will be used to look up the object.
    This method is called by the default implementation of get_object() and
    may not be called if get_object() is overridden.
    """
    if self.queryset is None:
        if self.model:
            return self.model._default_manager.all()
        else:
            raise ImproperlyConfigured(
                "%(cls)s is missing a QuerySet. Define "
                "%(cls)s.model, %(cls)s.queryset, or override "
                "%(cls)s.get_queryset()." % {
                    'cls': self.__class__.__name__
                }
            )
    return self.queryset.all()

Get the name of a slug field to be used to look up by slug.
78
79
80
def get_slug_field(self):
    """Get the name of a slug field to be used to look up by slug."""
    return self.slug_field
ModelFormMixin
Return the URL to redirect to after processing a valid form.
110
111
112
113
114
115
116
117
118
119
120
121
def get_success_url(self):
    """Return the URL to redirect to after processing a valid form."""
    if self.success_url:
        url = self.success_url.format(**self.object.__dict__)
    else:
        try:
            url = self.object.get_absolute_url()
        except AttributeError:
            raise ImproperlyConfigured(
                "No URL to redirect to.  Either provide a url or define"
                " a get_absolute_url method on the Model.")
    return url
FormMixin
Return the URL to redirect to after processing a valid form.
49
50
51
52
53
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
Auth mixins
Auth views
generic
Generic base
Generic dates
Generic detail
Generic edit
Generic list