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authorRussell Keith-Magee <russell@keith-magee.com>2010-03-08 03:20:55 +0000
committerRussell Keith-Magee <russell@keith-magee.com>2010-03-08 03:20:55 +0000
commitd1e37f2b396d8b86c44d834bc404a22db7d7afb2 (patch)
tree238045a686eb26c537f8710573b57705d3534199
parent6e030e7d1e866d02867c7bc7ddbf2c2243541472 (diff)
downloaddjango-d1e37f2b396d8b86c44d834bc404a22db7d7afb2.tar.gz
Fixed #12097 -- Cleaned up the documentation for ModelChoiceField and MultipleModelChoiceField. Thanks to JasonYosinski for the patch.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@12712 bcc190cf-cafb-0310-a4f2-bffc1f526a37
-rw-r--r--docs/ref/forms/fields.txt59
1 files changed, 35 insertions, 24 deletions
diff --git a/docs/ref/forms/fields.txt b/docs/ref/forms/fields.txt
index 829d28359b..9354c877c6 100644
--- a/docs/ref/forms/fields.txt
+++ b/docs/ref/forms/fields.txt
@@ -777,15 +777,22 @@ for ``TimeField`` are used.
Fields which handle relationships
---------------------------------
-For representing relationships between models, two fields are
-provided which can derive their choices from a ``QuerySet``:
+Two fields are available for representing relationships between
+models: :class:`ModelChoiceField` and
+:class:`ModelMultipleChoiceField`. Both of these fields require a
+single ``queryset`` parameter that is used to create the choices for
+the field. Upon form validation, these fields will place either one
+model object (in the case of ``ModelChoiceField``) or multiple model
+objects (in the case of ``ModelMultipleChoiceField``) into the
+``cleaned_data`` dictionary of the form.
+
+``ModelChoiceField``
+~~~~~~~~~~~~~~~~~~~~
.. class:: ModelChoiceField(**kwargs)
-.. class:: ModelMultipleChoiceField(**kwargs)
-These fields place one or more model objects into the ``cleaned_data``
-dictionary of forms in which they're used. Both of these fields have an
-additional required argument:
+Allows the selection of a single model object, suitable for
+representing a foreign key. A single argument is required:
.. attribute:: ModelChoiceField.queryset
@@ -793,22 +800,7 @@ additional required argument:
field will be derived, and which will be used to validate the
user's selection.
-``ModelChoiceField``
-~~~~~~~~~~~~~~~~~~~~
-
-Allows the selection of a single model object, suitable for
-representing a foreign key.
-
-The ``__unicode__`` method of the model will be called to generate
-string representations of the objects for use in the field's choices;
-to provide customized representations, subclass ``ModelChoiceField``
-and override ``label_from_instance``. This method will receive a model
-object, and should return a string suitable for representing it. For
-example::
-
- class MyModelChoiceField(ModelChoiceField):
- def label_from_instance(self, obj):
- return "My Object #%i" % obj.id
+``ModelChoiceField`` also takes one optional argument:
.. attribute:: ModelChoiceField.empty_label
@@ -828,13 +820,32 @@ example::
initial value, no empty choice is created (regardless of the value
of ``empty_label``).
+The ``__unicode__`` method of the model will be called to generate
+string representations of the objects for use in the field's choices;
+to provide customized representations, subclass ``ModelChoiceField``
+and override ``label_from_instance``. This method will receive a model
+object, and should return a string suitable for representing it. For
+example::
+
+ class MyModelChoiceField(ModelChoiceField):
+ def label_from_instance(self, obj):
+ return "My Object #%i" % obj.id
+
``ModelMultipleChoiceField``
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.. class:: ModelMultipleChoiceField(**kwargs)
+
Allows the selection of one or more model objects, suitable for
-representing a many-to-many relation. As with ``ModelChoiceField``,
+representing a many-to-many relation. As with :class:`ModelChoiceField`,
you can use ``label_from_instance`` to customize the object
-representations.
+representations, and ``queryset`` is a required parameter:
+
+.. attribute:: ModelMultipleChoiceField.queryset
+
+ A ``QuerySet`` of model objects from which the choices for the
+ field will be derived, and which will be used to validate the
+ user's selection.
Creating custom fields
----------------------