MultipleObjectMixin¶django.views.generic.list.MultipleObjectMixin¶A mixin that can be used to display a list of objects.
If paginate_by is specified, Django will paginate the results returned
by this. You can specify the page number in the URL in one of two ways:
Use the page parameter in the URLconf. For example, this is what
your URLconf might look like:
path('objects/page<int:page>/', PaginatedView.as_view()),
Pass the page number via the page query-string parameter. For
example, a URL would look like this:
/objects/?page=3
These values and lists are 1-based, not 0-based, so the first page would be
represented as page 1.
For more on pagination, read the pagination documentation.
As a special case, you are also permitted to use last as a value for
page:
/objects/?page=last
This allows you to access the final page of results without first having to determine how many pages there are.
Note that page must be either a valid page number or the value
last; any other value for page will result in a 404 error.
Extends
Methods and Attributes
allow_empty¶A boolean specifying whether to display the page if no objects are
available. If this is False and no objects are available, the view
will raise a 404 instead of displaying an empty page. By default, this
is True.
model¶The model that this view will display data for. Specifying model
= Foo is effectively the same as specifying queryset =
Foo.objects.all(), where objects stands for Foo’s
default manager.
queryset¶A QuerySet that represents the objects. If provided, the value of
queryset supersedes the value provided for model.
警告
queryset is a class attribute with a mutable value so care
must be taken when using it directly. Before using it, either call
its all() method or
retrieve it with get_queryset() which takes care of the
cloning behind the scenes.
ordering¶A string or list of strings specifying the ordering to apply to the queryset.
Valid values are the same as those for order_by().
paginate_by¶An integer specifying how many objects should be displayed per page. If
this is given, the view will paginate objects with
paginate_by objects per page. The view will
expect either a page query string parameter (via request.GET)
or a page variable specified in the URLconf.
paginate_orphans¶An integer specifying the number of "overflow" objects the last page
can contain. This extends the paginate_by limit on the last
page by up to paginate_orphans, in order to keep the last page from
having a very small number of objects.
page_kwarg¶A string specifying the name to use for the page parameter.
The view will expect this parameter to be available either as a query
string parameter (via request.GET) or as a kwarg variable specified
in the URLconf. Defaults to page.
paginator_class¶The paginator class to be used for pagination. By default,
django.core.paginator.Paginator is used. If the custom paginator
class doesn't have the same constructor interface as
django.core.paginator.Paginator, you will also need to
provide an implementation for get_paginator().
context_object_name¶Designates the name of the variable to use in the context.
get_queryset()¶Get the list of items for this view. This must be an iterable and may be a queryset (in which queryset-specific behavior will be enabled).
get_ordering()¶Returns a string (or iterable of strings) that defines the ordering that
will be applied to the queryset.
Returns ordering by default.
paginate_queryset(queryset, page_size)¶Returns a 4-tuple containing (paginator, page, object_list,
is_paginated).
Constructed by paginating queryset into pages of size page_size.
If the request contains a page argument, either as a captured URL
argument or as a GET argument, object_list will correspond to the
objects from that page.
get_paginate_by(queryset)¶Returns the number of items to paginate by, or None for no
pagination. By default this simply returns the value of
paginate_by.
get_paginator(queryset, per_page, orphans=0, allow_empty_first_page=True)¶Returns an instance of the paginator to use for this view. By default,
instantiates an instance of paginator_class.
get_paginate_orphans()¶An integer specifying the number of "overflow" objects the last page
can contain. By default this simply returns the value of
paginate_orphans.
get_allow_empty()¶Return a boolean specifying whether to display the page if no objects
are available. If this method returns False and no objects are
available, the view will raise a 404 instead of displaying an empty
page. By default, this is True.
get_context_object_name(object_list)¶Return the context variable name that will be used to contain
the list of data that this view is manipulating. If
object_list is a queryset of Django objects and
context_object_name is not set,
the context name will be the model_name of the model that
the queryset is composed from, with postfix '_list'
appended. For example, the model Article would have a
context object named article_list.
get_context_data(**kwargs)¶Returns context data for displaying the list of objects.
Context
object_list: The list of objects that this view is displaying. If
context_object_name is specified, that variable will also be set
in the context, with the same value as object_list.is_paginated: A boolean representing whether the results are
paginated. Specifically, this is set to False if no page size has
been specified, or if the available objects do not span multiple
pages.paginator: An instance of
django.core.paginator.Paginator. If the page is not
paginated, this context variable will be None.page_obj: An instance of
django.core.paginator.Page. If the page is not paginated,
this context variable will be None.MultipleObjectTemplateResponseMixin¶django.views.generic.list.MultipleObjectTemplateResponseMixin¶A mixin class that performs template-based response rendering for views
that operate upon a list of object instances. Requires that the view it is
mixed with provides self.object_list, the list of object instances that
the view is operating on. self.object_list may be, but is not required
to be, a QuerySet.
Extends
Methods and Attributes
template_name_suffix¶The suffix to append to the auto-generated candidate template name.
Default suffix is _list.
get_template_names()¶Returns a list of candidate template names. Returns the following list:
template_name on the view (if provided)<app_label>/<model_name><template_name_suffix>.html1月 11, 2019