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| -rw-r--r-- | docs/django-admin.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/django-admin.txt b/docs/django-admin.txt index 75c2738543..ad17907b5e 100644 --- a/docs/django-admin.txt +++ b/docs/django-admin.txt @@ -400,6 +400,19 @@ install them in the database. This includes any apps shipped with Django that might be in ``INSTALLED_APPS`` by default. When you start a new project, run this command to install the default apps. +.. admonition:: Syncdb will not alter existing tables + + ``syncdb`` will only create tables for models which have not yet been + installed. It will *never* issue ``ALTER TABLE`` statements to match + changes made to a model class after installation. Changes to model classes + and database schemas often involve some form of ambiguity and, in those + cases, Django would have to guess at the correct changes to make. There is + a risk that critical data would be lost in the process. + + If you have made changes to a model and wish to alter the database tables + to match, use the ``sql`` command to display the new SQL structure and + compare that to your existing table schema to work out the changes. + If you're installing the ``django.contrib.auth`` application, ``syncdb`` will give you the option of creating a superuser immediately. |