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131 lines
4.8 KiB
Plaintext
131 lines
4.8 KiB
Plaintext
====================
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Single object mixins
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====================
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SingleObjectMixin
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-----------------
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.. class:: django.views.generic.detail.SingleObjectMixin
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Provides a mechanism for looking up an object associated with the
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current HTTP request.
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**Methods and Attributes**
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.. attribute:: model
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The model that this view will display data for. Specifying ``model
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= Foo`` is effectively the same as specifying ``queryset =
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Foo.objects.all()``.
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.. attribute:: queryset
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A ``QuerySet`` that represents the objects. If provided, the value of
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:attr:`SingleObjectMixin.queryset` supersedes the value provided for
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:attr:`SingleObjectMixin.model`.
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.. attribute:: slug_field
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The name of the field on the model that contains the slug. By default,
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``slug_field`` is ``'slug'``.
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.. attribute:: slug_url_kwarg
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.. versionadded:: 1.4
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The name of the URLConf keyword argument that contains the slug. By
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default, ``slug_url_kwarg`` is ``'slug'``.
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.. attribute:: pk_url_kwarg
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.. versionadded:: 1.4
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The name of the URLConf keyword argument that contains the primary key.
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By default, ``pk_url_kwarg`` is ``'pk'``.
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.. attribute:: context_object_name
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Designates the name of the variable to use in the context.
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.. method:: get_object(queryset=None)
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Returns the single object that this view will display. If
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``queryset`` is provided, that queryset will be used as the
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source of objects; otherwise,
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:meth:`~SingleObjectMixin.get_queryset` will be used.
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``get_object()`` looks for a
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:attr:`SingleObjectMixin.pk_url_kwarg` argument in the arguments
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to the view; if this argument is found, this method performs a
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primary-key based lookup using that value. If this argument is not
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found, it looks for a :attr:`SingleObjectMixin.slug_url_kwarg`
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argument, and performs a slug lookup using the
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:attr:`SingleObjectMixin.slug_field`.
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.. method:: get_queryset()
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Returns the queryset that will be used to retrieve the object that
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this view will display. By default,
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:meth:`~SingleObjectMixin.get_queryset` returns the value of the
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:attr:`~SingleObjectMixin.queryset` attribute if it is set, otherwise
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it constructs a :class:`QuerySet` by calling the `all()` method on the
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:attr:`~SingleObjectMixin.model` attribute's default manager.
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.. method:: get_context_object_name(obj)
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Return the context variable name that will be used to contain the
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data that this view is manipulating. If
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:attr:`~SingleObjectMixin.context_object_name` is not set, the context
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name will be constructed from the ``object_name`` of the model that
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the queryset is composed from. For example, the model ``Article``
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would have context object named ``'article'``.
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.. method:: get_context_data(**kwargs)
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Returns context data for displaying the list of objects.
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**Context**
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* ``object``: The object that this view is displaying. If
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``context_object_name`` is specified, that variable will also be
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set in the context, with the same value as ``object``.
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SingleObjectTemplateResponseMixin
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---------------------------------
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.. class:: django.views.generic.detail.SingleObjectTemplateResponseMixin
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A mixin class that performs template-based response rendering for views
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that operate upon a single object instance. Requires that the view it is
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mixed with provides ``self.object``, the object instance that the view is
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operating on. ``self.object`` will usually be, but is not required to be,
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an instance of a Django model. It may be ``None`` if the view is in the
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process of constructing a new instance.
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**Extends**
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* :class:`~django.views.generic.base.TemplateResponseMixin`
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**Methods and Attributes**
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.. attribute:: template_name_field
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The field on the current object instance that can be used to determine
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the name of a candidate template. If either ``template_name_field``
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itself or the value of the ``template_name_field`` on the current
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object instance is ``None``, the object will not be used for a
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candidate template name.
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.. attribute:: template_name_suffix
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The suffix to append to the auto-generated candidate template name.
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Default suffix is ``_detail``.
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.. method:: get_template_names()
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Returns a list of candidate template names. Returns the following list:
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* the value of ``template_name`` on the view (if provided)
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* the contents of the ``template_name_field`` field on the
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object instance that the view is operating upon (if available)
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* ``<app_label>/<object_name><template_name_suffix>.html``
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