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Fixed #4869 -- Added a note that syncdb does not alter existing tables. Thanks,
James Bennett. git-svn-id: http://code.djangoproject.com/svn/django/trunk@5692 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -400,6 +400,19 @@ install them in the database. This includes any apps shipped with Django that
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might be in ``INSTALLED_APPS`` by default. When you start a new project, run
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this command to install the default apps.
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.. admonition:: Syncdb will not alter existing tables
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``syncdb`` will only create tables for models which have not yet been
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installed. It will *never* issue ``ALTER TABLE`` statements to match
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changes made to a model class after installation. Changes to model classes
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and database schemas often involve some form of ambiguity and, in those
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cases, Django would have to guess at the correct changes to make. There is
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a risk that critical data would be lost in the process.
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If you have made changes to a model and wish to alter the database tables
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to match, use the ``sql`` command to display the new SQL structure and
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compare that to your existing table schema to work out the changes.
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If you're installing the ``django.contrib.auth`` application, ``syncdb`` will
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give you the option of creating a superuser immediately.
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