Fixed ReST error in docs/db-api.txt
git-svn-id: http://code.djangoproject.com/svn/django/trunk@3567 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
parent
54ea309a1d
commit
aa587cd977
|
@ -718,12 +718,12 @@ The ``DoesNotExist`` exception inherits from
|
|||
A convenience method for creating an object and saving it all in one step. Thus::
|
||||
|
||||
p = Person.objects.create(first_name="Bruce", last_name="Springsteen")
|
||||
|
||||
|
||||
and::
|
||||
|
||||
p = Person(first_name="Bruce", last_name="Springsteen")
|
||||
p.save()
|
||||
|
||||
|
||||
are equivalent.
|
||||
|
||||
``get_or_create(**kwargs)``
|
||||
|
@ -1471,11 +1471,12 @@ the ``ForeignKey`` ``Manager`` has these additional methods:
|
|||
b.entry_set.remove(e) # Disassociates Entry e from Blog b.
|
||||
|
||||
In order to prevent database inconsistency, this method only exists on
|
||||
``ForeignKey``s where ``null=True``. If the related field can't be set to
|
||||
``None`` (``NULL``), then an object can't be removed from a relation
|
||||
without being added to another. In the above example, removing ``e`` from
|
||||
``b.entry_set()`` is equivalent to doing ``e.blog = None``, and because
|
||||
the ``blog`` ``ForeignKey`` doesn't have ``null=True``, this is invalid.
|
||||
``ForeignKey`` objects where ``null=True``. If the related field can't be
|
||||
set to ``None`` (``NULL``), then an object can't be removed from a
|
||||
relation without being added to another. In the above example, removing
|
||||
``e`` from ``b.entry_set()`` is equivalent to doing ``e.blog = None``,
|
||||
and because the ``blog`` ``ForeignKey`` doesn't have ``null=True``, this
|
||||
is invalid.
|
||||
|
||||
* ``clear()``: Removes all objects from the related object set.
|
||||
|
||||
|
@ -1559,13 +1560,13 @@ Queries over related objects
|
|||
----------------------------
|
||||
|
||||
Queries involving related objects follow the same rules as queries involving
|
||||
normal value fields. When specifying the the value for a query to match, you
|
||||
may use either an object instance itself, or the primary key value for the
|
||||
normal value fields. When specifying the the value for a query to match, you
|
||||
may use either an object instance itself, or the primary key value for the
|
||||
object.
|
||||
|
||||
For example, if you have a Blog object ``b`` with ``id=5``, the following
|
||||
three queries would be identical::
|
||||
|
||||
|
||||
Entry.objects.filter(blog=b) # Query using object instance
|
||||
Entry.objects.filter(blog=b.id) # Query using id from instance
|
||||
Entry.objects.filter(blog=5) # Query using id directly
|
||||
|
|
Loading…
Reference in New Issue