simple sql migration tool to save you from becoming mad
Project description
Nomad is a simple migration application, which specifically takes into account properties of development with DVCS and is completely agnostic from ORM or whatever you are using to access your database. It uses simple SQL scripts to migrate and can run pre- and post-processing routines written in any language (Python, Ruby or whatever do you use for your application).
Concept
Nomad’s migration store is a directory with nomad.ini and a other directories inside. Each directory in it containing migration.ini is a single migration and name of child directory is an identifier of migration.
It looks like this:
migrations/
nomad.ini
2011-11-11-first-migration/
migration.ini
up.sql
2011-11-12-second-migration/
migration.ini
1-pre.py
2-up.sql
3-post.py
Main properties:
There is no downgrades - nobody ever tests them, they are rarely necessary
You can write migration in whatever language you want, tool only helps you track applied migrations and dependencies
.sql is treated differently and executed against database, configured in nomad.ini
Only .sql and executable files (sorry, Windows!) are executed. You can put READMEs, pieces of documentation, whatever you want alongside your migrations.
Name matters - everything is executed in order. Order is determined by using human sort (so that x-1.sql is earlier than x-10.sql, you can always check sorting with ls --sort=version).
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