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68 lines
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68 lines
2.2 KiB
Plaintext
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.. _howto-legacy-databases:
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=========================================
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Integrating Django with a legacy database
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=========================================
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While Django is best suited for developing new applications, it's quite
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possible to integrate it into legacy databases. Django includes a couple of
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utilities to automate as much of this process as possible.
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This document assumes you know the Django basics, as covered in the
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:ref:`tutorial <intro-tutorial01>`.
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Once you've got Django set up, you'll follow this general process to integrate
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with an existing database.
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Give Django your database parameters
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====================================
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You'll need to tell Django what your database connection parameters are, and
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what the name of the database is. Do that by editing these settings in your
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:ref:`settings file <topics-settings>`:
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* :setting:`DATABASE_NAME`
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* :setting:`DATABASE_ENGINE`
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* :setting:`DATABASE_USER`
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* :setting:`DATABASE_PASSWORD`
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* :setting:`DATABASE_HOST`
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* :setting:`DATABASE_PORT`
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Auto-generate the models
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========================
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.. highlight:: bash
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Django comes with a utility called :djadmin:`inspectdb` that can create models
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by introspecting an existing database. You can view the output by running this
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command::
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python manage.py inspectdb
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Save this as a file by using standard Unix output redirection::
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python manage.py inspectdb > models.py
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This feature is meant as a shortcut, not as definitive model generation. See the
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:djadmin:`documentation of inspectdb <inspectdb>` for more information.
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Once you've cleaned up your models, name the file ``models.py`` and put it in
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the Python package that holds your app. Then add the app to your
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:setting:`INSTALLED_APPS` setting.
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Install the core Django tables
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==============================
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Next, run the :djadmin:`syncdb` command to install any extra needed database
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records such as admin permissions and content types::
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python manage.py syncdb
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Test and tweak
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==============
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Those are the basic steps -- from here you'll want to tweak the models Django
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generated until they work the way you'd like. Try accessing your data via the
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Django database API, and try editing objects via Django's admin site, and edit
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the models file accordingly.
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