django/docs/ref/contrib/postgres/index.txt

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``django.contrib.postgres``
===========================
.. versionadded:: 1.8
PostgreSQL has a number of features which are not shared by the other databases
Django supports. This optional module contains model fields and form fields for
a number of PostgreSQL specific data types.
.. note::
Django is, and will continue to be, a database-agnostic web framework. We
would encourage those writing reusable applications for the Django
community to write database-agnostic code where practical. However, we
recognize that real world projects written using Django need not be
database-agnostic. In fact, once a project reaches a given size changing
the underlying data store is already a significant challenge and is likely
to require changing the code base in some ways to handle differences
between the data stores.
Django provides support for a number of data types which will
only work with PostgreSQL. There is no fundamental reason why (for example)
a ``contrib.mysql`` module does not exist, except that PostgreSQL has the
richest feature set of the supported databases so its users have the most
to gain.
.. toctree::
:maxdepth: 2
fields
forms
lookups
operations
validators