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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/topics/db/queries.txt | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/docs/topics/db/queries.txt b/docs/topics/db/queries.txt index bc72b04370..3430fcc7fd 100644 --- a/docs/topics/db/queries.txt +++ b/docs/topics/db/queries.txt @@ -94,18 +94,23 @@ the database until you explicitly call ``save()``. 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:: +Updating a ``ForeignKey`` field works exactly the same way as saving a normal +field; simply assign an object of the right type to the field in question. +This example updates the ``blog`` attribute of an ``Entry`` instance ``entry``:: + >>> from mysite.blog.models import Entry + >>> entry = Entry.objects.get(pk=1) >>> 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:: +method on the field to add a record to the relation. This example adds the +``Author`` instance ``joe`` to the ``entry`` object:: - >> joe = Author.objects.create(name="Joe") - >> entry.authors.add(joe) + >>> from mysite.blog.models import Author + >>> joe = Author.objects.create(name="Joe") + >>> entry.authors.add(joe) Django will complain if you try to assign or add an object of the wrong type. |