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64 lines
2.1 KiB
Markdown
64 lines
2.1 KiB
Markdown
Asterisk Database Manager
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=========================
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Asterisk includes optional database integration for a variety of features.
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The purpose of this effort is to assist in managing the database schema
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for Asterisk database integration.
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This is implemented as a set of repositories that contain database schema
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migrations, using [Alembic](http://alembic.readthedocs.org). The existing
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repositories include:
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* `config` - Tables used for Asterisk realtime configuration
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* `voicemail` - Tables used for `ODBC_STOARGE` of voicemail messages
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Alembic uses SQLAlchemy, which has support for
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[many databases](http://docs.sqlalchemy.org/en/rel_0_8/dialects/index.html).
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IMPORTANT NOTE: This is brand new and the initial migrations are still subject
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to change. Only use this for testing purposes for now.
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Example Usage
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-------------
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First, create an ini file that contains database connection details. For help
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with connection string details, see the
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[SQLAlchemy docs](http://docs.sqlalchemy.org/en/rel_0_8/core/engines.html#database-urls).
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$ cp config.ini.sample config.ini
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... edit config.ini and change sqlalchemy.url ...
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Next, bring the database up to date with the current schema.
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$ alembic -c config.ini upgrade head
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In the future, as additional database migrations are added, you can run
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alembic again to migrate the existing tables to the latest schema.
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$ alembic -c config.ini upgrade head
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The migrations support both upgrading and downgrading. You could go all the
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way back to where you started with no tables by downgrading back to the base
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revision.
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$ alembic -c config.ini downgrade base
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`base` and `head` are special revisions. You can refer to specific revisions
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to upgrade or downgrade to, as well.
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$ alembic -c config.ini upgrade 4da0c5f79a9c
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Offline Mode
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------------
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If you would like to just generate the SQL statements that would have been
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executed, you can use alembic's offline mode.
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$ alembic -c config.ini upgrade head --sql
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Adding Database Migrations
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--------------------------
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The best way to learn about how to add additional database migrations is to
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refer to the [Alembic documentation](http://alembic.readthedocs.org).
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