class BaseUpdateView

from django.views.generic.edit import BaseUpdateView
Base view for updating an existing object.

Using this base class requires subclassing to provide a response mixin.

Attributes

  Defined in
context_object_name = None SingleObjectMixin
form_class = None FormMixin
http_method_names = [u'get', u'post', u'put', u'delete', u'head', u'options', u'trace'] View
initial = {} FormMixin
model = None SingleObjectMixin
pk_url_kwarg = 'pk' SingleObjectMixin
queryset = None SingleObjectMixin
slug_field = 'slug' SingleObjectMixin
slug_url_kwarg = 'slug' SingleObjectMixin
success_url = None FormMixin
Expand Collapse

Methods

def __init__(self, **kwargs): View

Constructor. Called in the URLconf; can contain helpful extra
keyword arguments, and other things.
35
36
37
38
39
40
41
42
43
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 six.iteritems(kwargs):
        setattr(self, key, value)

def _allowed_methods(self): View

106
107
def _allowed_methods(self):
    return [m.upper() for m in self.http_method_names if hasattr(self, m)]

def as_view(cls, **initkwargs): View

Main entry point for a request-response process.
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
@classonlymethod
def as_view(cls, **initkwargs):
    """
    Main entry point for a request-response process.
    """
    # sanitize keyword arguments
    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)
    # 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): View

78
79
80
81
82
83
84
85
86
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)
    else:
        handler = self.http_method_not_allowed
    return handler(request, *args, **kwargs)

def form_invalid(self, form): FormMixin

If the form is invalid, re-render the context data with the
data-filled form and errors.
67
68
69
70
71
72
def form_invalid(self, form):
    """
    If the form is invalid, re-render the context data with the
    data-filled form and errors.
    """
    return self.render_to_response(self.get_context_data(form=form))

def form_valid(self, form):

ModelFormMixin

If the form is valid, save the associated model.
123
124
125
126
127
128
def form_valid(self, form):
    """
    If the form is valid, save the associated model.
    """
    self.object = form.save()
    return super(ModelFormMixin, self).form_valid(form)

FormMixin

If the form is valid, redirect to the supplied URL.
61
62
63
64
65
def form_valid(self, form):
    """
    If the form is valid, redirect to the supplied URL.
    """
    return HttpResponseRedirect(self.get_success_url())

def get(self, request, *args, **kwargs):

BaseUpdateView

216
217
218
def get(self, request, *args, **kwargs):
    self.object = self.get_object()
    return super(BaseUpdateView, self).get(request, *args, **kwargs)

ProcessFormView

Handles GET requests and instantiates a blank version of the form.
149
150
151
152
153
154
155
def get(self, request, *args, **kwargs):
    """
    Handles GET requests and instantiates a blank version of the form.
    """
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    return self.render_to_response(self.get_context_data(form=form))

def get_context_data(self, **kwargs):

ModelFormMixin

If an object has been supplied, inject it into the context with the
supplied context_object_name name.
130
131
132
133
134
135
136
137
138
139
140
141
142
def get_context_data(self, **kwargs):
    """
    If an object has been supplied, inject it into the context with the
    supplied context_object_name name.
    """
    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(ModelFormMixin, self).get_context_data(**context)

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 = {}
    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(SingleObjectMixin, self).get_context_data(**context)

ContextMixin

21
22
23
24
def get_context_data(self, **kwargs):
    if 'view' not in kwargs:
        kwargs['view'] = self
    return kwargs

def get_context_object_name(self, obj): SingleObjectMixin

Get the name to use for the object.
80
81
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.object_name.lower()
    else:
        return None

def get_form(self, form_class): FormMixin

Returns an instance of the form to be used in this view.
31
32
33
34
35
def get_form(self, form_class):
    """
    Returns an instance of the form to be used in this view.
    """
    return form_class(**self.get_form_kwargs())

def get_form_class(self):

ModelFormMixin

Returns the form class to use in this view.
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
def get_form_class(self):
    """
    Returns the form class to use in this view.
    """
    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 hasattr(self, 'object') and self.object 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
        return model_forms.modelform_factory(model)

FormMixin

Returns the form class to use in this view
25
26
27
28
29
def get_form_class(self):
    """
    Returns the form class to use in this view
    """
    return self.form_class

def get_form_kwargs(self):

ModelFormMixin

Returns the keyword arguments for instantiating the form.
100
101
102
103
104
105
106
def get_form_kwargs(self):
    """
    Returns the keyword arguments for instantiating the form.
    """
    kwargs = super(ModelFormMixin, self).get_form_kwargs()
    kwargs.update({'instance': self.object})
    return kwargs

FormMixin

Returns the keyword arguments for instantiating the form.
37
38
39
40
41
42
43
44
45
46
47
def get_form_kwargs(self):
    """
    Returns the keyword arguments for instantiating the form.
    """
    kwargs = {'initial': self.get_initial()}
    if self.request.method in ('POST', 'PUT'):
        kwargs.update({
            'data': self.request.POST,
            'files': self.request.FILES,
        })
    return kwargs

def get_initial(self): FormMixin

Returns the initial data to use for forms on this view.
19
20
21
22
23
def get_initial(self):
    """
    Returns the initial data to use for forms on this view.
    """
    return self.initial.copy()

def get_object(self, queryset=None): SingleObjectMixin

Returns the object the view is displaying.

By default this requires `self.queryset` and a `pk` or `slug` argument
in the URLconf, but subclasses can override this to return any object.
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):
    """
    Returns the object the view is displaying.
    By default this requires `self.queryset` and a `pk` or `slug` argument
    in the URLconf, but 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, None)
    slug = self.kwargs.get(self.slug_url_kwarg, None)
    if pk is not None:
        queryset = queryset.filter(pk=pk)
    # Next, try looking up by slug.
    elif slug is not None:
        slug_field = self.get_slug_field()
        queryset = queryset.filter(**{slug_field: slug})
    # If none of those are defined, it's an error.
    else:
        raise AttributeError("Generic detail view %s must be called with "
                             "either an object pk or a slug."
                             % self.__class__.__name__)
    try:
        # Get the single item from the filtered queryset
        obj = queryset.get()
    except ObjectDoesNotExist:
        raise Http404(_("No %(verbose_name)s found matching the query") %
                      {'verbose_name': queryset.model._meta.verbose_name})
    return obj

def get_queryset(self): SingleObjectMixin

Get the queryset to look an object up against. May not be called if
`get_object` is overridden.
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
def get_queryset(self):
    """
    Get the queryset to look an object up against. 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._clone()

def get_slug_field(self): SingleObjectMixin

Get the name of a slug field to be used to look up by slug.
74
75
76
77
78
def get_slug_field(self):
    """
    Get the name of a slug field to be used to look up by slug.
    """
    return self.slug_field

def get_success_url(self):

ModelFormMixin

Returns the supplied URL.
108
109
110
111
112
113
114
115
116
117
118
119
120
121
def get_success_url(self):
    """
    Returns the supplied URL.
    """
    if self.success_url:
        url = self.success_url % 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

Returns the supplied success URL.
49
50
51
52
53
54
55
56
57
58
59
def get_success_url(self):
    """
    Returns the supplied success URL.
    """
    if self.success_url:
        # Forcing possible reverse_lazy evaluation
        url = force_text(self.success_url)
    else:
        raise ImproperlyConfigured(
            "No URL to redirect to. Provide a success_url.")
    return url

def http_method_not_allowed(self, request, *args, **kwargs): View

88
89
90
91
92
93
94
95
def http_method_not_allowed(self, request, *args, **kwargs):
    logger.warning('Method Not Allowed (%s): %s', request.method, request.path,
        extra={
            'status_code': 405,
            'request': self.request
        }
    )
    return http.HttpResponseNotAllowed(self._allowed_methods())

def options(self, request, *args, **kwargs): View

Handles responding to requests for the OPTIONS HTTP verb.
 97
 98
 99
100
101
102
103
104
def options(self, request, *args, **kwargs):
    """
    Handles responding to requests for the OPTIONS HTTP verb.
    """
    response = http.HttpResponse()
    response['Allow'] = ', '.join(self._allowed_methods())
    response['Content-Length'] = '0'
    return response

def post(self, request, *args, **kwargs):

BaseUpdateView

220
221
222
def post(self, request, *args, **kwargs):
    self.object = self.get_object()
    return super(BaseUpdateView, self).post(request, *args, **kwargs)

ProcessFormView

Handles POST requests, instantiating a form instance with the passed
POST variables and then checked for validity.
157
158
159
160
161
162
163
164
165
166
167
def post(self, request, *args, **kwargs):
    """
    Handles POST requests, instantiating a form instance with the passed
    POST variables and then checked for validity.
    """
    form_class = self.get_form_class()
    form = self.get_form(form_class)
    if form.is_valid():
        return self.form_valid(form)
    else:
        return self.form_invalid(form)

def put(self, *args, **kwargs): ProcessFormView

171
172
def put(self, *args, **kwargs):
    return self.post(*args, **kwargs)