Schema migration made easy
Project description
dbschema is a tool to run MySQL or PostgreSQL migrations automatically. Using a table, it keeps a state of previous migrations to avoid duplicates.
Features:
Support for MySQL and PostgreSQL
Optional pre and post-migration queries (for example to update privileges)
Multiple migrations in multiple databases can be processed as one.
Installation
Install dbschema
pip3 install dbschema
Create a config file
Create the file ~/.dbschema.yml and add your databases configuration. See example
Create migrations table
dbschema uses a table called migrations_applied to keep track of migrations already applied to avoid duplication. See the schema for MySQL or PostgreSQL.
Migrations folder structure
For each database, you need to have a migration path (setting path in the migration file).
Within that path you need to create one folder per migration. This folder needs to contain a file called up.sql with the SQL queries.
/path/to/migrations/db1/ |-- migration1/ | |-- up.sql |-- migration2/ | |-- up.sql |... /path/to/migrations/db2/ |-- migration1/ | |-- up.sql |-- migration2/ | |-- up.sql |...
Usage
dbschema
# or
dbschema --config /path/to/config.yml
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