Fixed #10981 -- Clarified documentation regarding lazy cross-application...

    class Manufacturer(models.Model):

        # ...

Note, however, that this only refers to models in the same ``models.py`` file --

you cannot use a string to reference a model defined in another application or

imported from elsewhere.

.. versionchanged:: 1.0

   Refering models in other applications must include the application label.

.. versionadded:: 1.0

To refer to models defined in another

application, you must instead explicitly specify the application label. For

example, if the ``Manufacturer`` model above is defined in another application

called ``production``, you'd need to use::

To refer to models defined in another application, you can explicitly specify

a model with the full application label. For example, if the ``Manufacturer``

model above is defined in another application called ``production``, you'd

need to use::

    class Car(models.Model):

        manufacturer = models.ForeignKey('production.Manufacturer')

This sort of reference can be useful when resolving circular import

dependencies between two applications.

Database Representation

~~~~~~~~~~~~~~~~~~~~~~~

Behind the scenes, Django appends ``"_id"`` to the field name to create its

database column name. In the above example, the database table for the ``Car``

model will have a ``manufacturer_id`` column. (You can change this explicitly by

.. _foreign-key-arguments:

Arguments

~~~~~~~~~

:class:`ForeignKey` accepts an extra set of arguments -- all optional -- that

define the details of how the relation works.

:class:`ForeignKey`, including all the options regarding :ref:`recursive

<recursive-relationships>` and :ref:`lazy <lazy-relationships>` relationships.

Database Representation

~~~~~~~~~~~~~~~~~~~~~~~

Behind the scenes, Django creates an intermediary join table to represent the

many-to-many relationship. By default, this table name is generated using the

names of the two tables being joined. Since some databases don't support table

.. _manytomany-arguments:

Arguments

~~~~~~~~~

:class:`ManyToManyField` accepts an extra set of arguments -- all optional --

that control how the relationship functions.