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Fixed #16742 -- Provided code examples in the models documentation fo…

…r accessing extra fields on many-to-many relationships. Many thanks to aj for the suggestion and to Nick Lang for the patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16817 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit fd9045346286208c0dbd0afc1f820e868910dac8 1 parent 7f45651
@jphalip jphalip authored
Showing with 22 additions and 1 deletion.
  1. +20 −1 docs/topics/db/models.txt
  2. +2 −0  docs/topics/db/queries.txt
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21 docs/topics/db/models.txt
@@ -325,7 +325,7 @@ whatever you want. For example::
For details on accessing backwards-related objects, see the
`Following relationships backward example`_.
-
+
For sample code, see the `Many-to-one relationship model tests`_.
.. _Following relationships backward example: http://docs.djangoproject.com/en/dev/topics/db/queries/#backwards-related-objects
@@ -519,6 +519,25 @@ As you are using an intermediate model, you can also query on its attributes::
... membership__date_joined__gt=date(1961,1,1))
[<Person: Ringo Starr]
+If you need to access a membership's information you may do so by directly
+querying the ``Membership`` model::
+
+ >>> ringos_membership = Membership.objects.get(group=beatles, person=ringo)
+ >>> ringos_membership.date_joined
+ datetime.date(1962, 8, 16)
+ >>> ringos_membership.invite_reason
+ u'Needed a new drummer.'
+
+Another way to access the same information is by querying the
+:ref:`many-to-many reverse relationship<m2m-reverse-relationships>` from a
+``Person`` object::
+
+ >>> ringos_membership = ringo.membership_set.get(group=beatles)
+ >>> ringos_membership.date_joined
+ datetime.date(1962, 8, 16)
+ >>> ringos_membership.invite_reason
+ u'Needed a new drummer.'
+
One-to-one relationships
~~~~~~~~~~~~~~~~~~~~~~~~
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2  docs/topics/db/queries.txt
@@ -1036,6 +1036,8 @@ Each "reverse" operation described in this section has an immediate effect on
the database. Every addition, creation and deletion is immediately and
automatically saved to the database.
+.. _m2m-reverse-relationships:
+
Many-to-many relationships
--------------------------
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