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authorJacob Kaplan-Moss <jacob@jacobian.org>2010-05-17 16:32:37 +0000
committerJacob Kaplan-Moss <jacob@jacobian.org>2010-05-17 16:32:37 +0000
commit47e3cc74d9bcf7ff2ce58cca34fa6575118357af (patch)
tree4baf493596e3fbd94db7db380b8e07c9d153a9d0
parentacd8dcd5b01f239a0d94a29b7b74310f6a603d82 (diff)
downloaddjango-47e3cc74d9bcf7ff2ce58cca34fa6575118357af.tar.gz
Slight fixes to related fields reference to avoid conflicting target names
with the queryset docs. git-svn-id: http://code.djangoproject.com/svn/django/trunk@13272 bcc190cf-cafb-0310-a4f2-bffc1f526a37
-rw-r--r--docs/ref/models/relations.txt131
1 files changed, 69 insertions, 62 deletions
diff --git a/docs/ref/models/relations.txt b/docs/ref/models/relations.txt
index 798569cc68..f58cfe7301 100644
--- a/docs/ref/models/relations.txt
+++ b/docs/ref/models/relations.txt
@@ -6,93 +6,100 @@ Related objects reference
.. currentmodule:: django.db.models.fields.related
-This document describes extra methods available on managers when used in a one-to-many or many-to-many related context. This happens in two cases:
+.. class:: RelatedManager
- * The "other side" of a ``ForeignKey`` relation. That is::
+ A "related manager" is a on managers used in a one-to-many or many-to-many
+ related context. This happens in two cases:
- class Reporter(models.Model):
- ...
+ * The "other side" of a ``ForeignKey`` relation. That is::
- class Article(models.Model):
- reporter = models.ForeignKey(Reporter)
+ class Reporter(models.Model):
+ ...
- In the above example, the methods below will be available on
- the manager ``reporter.article_set``.
+ class Article(models.Model):
+ reporter = models.ForeignKey(Reporter)
- * Both sides of a ``ManyToManyField`` relation::
+ In the above example, the methods below will be available on
+ the manager ``reporter.article_set``.
- class Topping(models.Model):
- ...
+ * Both sides of a ``ManyToManyField`` relation::
- class Pizza(models.Model):
- toppings = models.ManyToManyField(Topping)
+ class Topping(models.Model):
+ ...
- In this example, the methods below will be available both on
- ``topping.pizza_set`` and on ``pizza.toppings``.
+ class Pizza(models.Model):
+ toppings = models.ManyToManyField(Topping)
-.. method:: add(obj1, [obj2, ...])
+ In this example, the methods below will be available both on
+ ``topping.pizza_set`` and on ``pizza.toppings``.
- Adds the specified model objects to the related object set.
+ These related managers have some extra methods:
- Example::
+ .. method:: add(obj1, [obj2, ...])
- >>> b = Blog.objects.get(id=1)
- >>> e = Entry.objects.get(id=234)
- >>> b.entry_set.add(e) # Associates Entry e with Blog b.
+ Adds the specified model objects to the related object set.
-.. method:: create(**kwargs)
+ Example::
- Creates a new object, saves it and puts it in the related object set.
- Returns the newly created object::
+ >>> b = Blog.objects.get(id=1)
+ >>> e = Entry.objects.get(id=234)
+ >>> b.entry_set.add(e) # Associates Entry e with Blog b.
- >>> b = Blog.objects.get(id=1)
- >>> e = b.entry_set.create(
- ... headline='Hello',
- ... body_text='Hi',
- ... pub_date=datetime.date(2005, 1, 1)
- ... )
+ .. method:: create(**kwargs)
- # No need to call e.save() at this point -- it's already been saved.
+ Creates a new object, saves it and puts it in the related object set.
+ Returns the newly created object::
- This is equivalent to (but much simpler than)::
+ >>> b = Blog.objects.get(id=1)
+ >>> e = b.entry_set.create(
+ ... headline='Hello',
+ ... body_text='Hi',
+ ... pub_date=datetime.date(2005, 1, 1)
+ ... )
- >>> b = Blog.objects.get(id=1)
- >>> e = Entry(
- .... blog=b,
- .... headline='Hello',
- .... body_text='Hi',
- .... pub_date=datetime.date(2005, 1, 1)
- .... )
- >>> e.save(force_insert=True)
+ # No need to call e.save() at this point -- it's already been saved.
- Note that there's no need to specify the keyword argument of the model that
- defines the relationship. In the above example, we don't pass the parameter
- ``blog`` to ``create()``. Django figures out that the new ``Entry`` object's
- ``blog`` field should be set to ``b``.
+ This is equivalent to (but much simpler than)::
-.. method:: remove(obj1, [obj2, ...])
+ >>> b = Blog.objects.get(id=1)
+ >>> e = Entry(
+ .... blog=b,
+ .... headline='Hello',
+ .... body_text='Hi',
+ .... pub_date=datetime.date(2005, 1, 1)
+ .... )
+ >>> e.save(force_insert=True)
- Removes the specified model objects from the related object set::
+ Note that there's no need to specify the keyword argument of the model
+ that defines the relationship. In the above example, we don't pass the
+ parameter ``blog`` to ``create()``. Django figures out that the new
+ ``Entry`` object's ``blog`` field should be set to ``b``.
- >>> b = Blog.objects.get(id=1)
- >>> e = Entry.objects.get(id=234)
- >>> b.entry_set.remove(e) # Disassociates Entry e from Blog b.
+ .. method:: remove(obj1, [obj2, ...])
- In order to prevent database inconsistency, this method only exists on
- ``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.
+ Removes the specified model objects from the related object set::
-.. method:: clear()
+ >>> b = Blog.objects.get(id=1)
+ >>> e = Entry.objects.get(id=234)
+ >>> b.entry_set.remove(e) # Disassociates Entry e from Blog b.
- Removes all objects from the related object set::
+ In order to prevent database inconsistency, this method only exists on
+ ``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.
- >>> b = Blog.objects.get(id=1)
- >>> b.entry_set.clear()
+ .. method:: clear()
- Note this doesn't delete the related objects -- it just disassociates them.
+ Removes all objects from the related object set::
- Just like ``remove()``, ``clear()`` is only available on ``ForeignKey``\s
- where ``null=True``.
+ >>> b = Blog.objects.get(id=1)
+ >>> b.entry_set.clear()
+
+ Note this doesn't delete the related objects -- it just disassociates
+ them.
+
+ Just like ``remove()``, ``clear()`` is only available on
+ ``ForeignKey``\s where ``null=True``.