Hello,
Can you share the initial code with us? This approach seems to be
good. Do you have experience on some project?

David

Mike H napsal:
> Hi all,
>
> I've been working on a tool to give me an automated way of altering the
> schemas on servers I deploy my django applications to. I know about the
> schema-evolution branch, but the current approach of that isn't
> completely automated and the work seems to have stopped on it.
>
> The approach I have taken is very simple. Inside each application
> installed in your project, you create a migrations module. Inside there
> is a list of migrations that need to be applied and an sql directory
> that contains the actual migrations themselves.
>
> For example :
>
> cms/
>     migrations/
>         migrator.py -- holds the list of migrations to run, in the order
> to run them
>         sql/
>             InstallInitialStructure.sql
>             AddNewAttributeColumn.sql
>             ... etc. ...
>
> So with this approach you would create the initial structure sql file
> using the django sql generation, then you would have to produce sql
> files for each addition / deletion / merge you need to make.
>
> The sql directory can have subdirectories named the same as your database
> engine if you need an engine specific sql file.
>
> All that is needed is to copy a migrate.py script into the root of your
> project and run 'python migrate.py' - any migrations on any of the
> installed applications that have not been run would automatically get
> run and a log kept so that migrations do not run twice.
>
> Does this sound useful to anyone who is doing automated deployments?
>
> Mike


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