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| author | Adrian Holovaty <adrian@holovaty.com> | 2007-08-25 18:58:36 +0000 |
|---|---|---|
| committer | Adrian Holovaty <adrian@holovaty.com> | 2007-08-25 18:58:36 +0000 |
| commit | b189e266ef1a4f8c3fba39e44e053ec42fc52098 (patch) | |
| tree | 981cb5c71bea369236a464a0bb45e2742f730fc5 /docs/db-api.txt | |
| parent | 861b28f37e790e13dfae45da5042588f0ab57b1a (diff) | |
Fixed #5068 -- Fixed error in docs/db-api.txt. Thanks, Collin Grady and SmileyChris
git-svn-id: http://code.djangoproject.com/svn/django/trunk@6010 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Diffstat (limited to 'docs/db-api.txt')
| -rw-r--r-- | docs/db-api.txt | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/docs/db-api.txt b/docs/db-api.txt index 766a6ae519..473a153cb8 100644 --- a/docs/db-api.txt +++ b/docs/db-api.txt @@ -207,14 +207,24 @@ the database until you explicitly call ``save()``. The ``save()`` method has no return value. -Updating ``ForeignKey`` fields works exactly the same way; simply assign an -object of the right type to the field in question:: +Saving ForeignKey and ManyToManyField fields +-------------------------------------------- + +Updating ``ForeignKey`` fields works exactly the same way as saving a normal +field; simply assign an object of the right type to the field in question:: + + cheese_blog = Blog.objects.get(name="Cheddar Talk") + entry.blog = cheese_blog + entry.save() + +Updating a ``ManyToManyField`` works a little differently; use the ``add()`` +method on the field to add a record to the relation:: joe = Author.objects.create(name="Joe") - entry.author = joe - entry.save() + entry.authors.add(joe) -Django will complain if you try to assign an object of the wrong type. +Django will complain if you try to assign or add an object of the wrong type. +You can find out more about `Queries over related objects`_ below. How Django knows to UPDATE vs. INSERT ------------------------------------- |
