drift/examples/migrations_example/README.md

Example to demonstrate tests for schema migrations.

See test/migration_test.dart on how to use the generated verification code.

Workflow

Schema changes

After adapting a schema and incrementing the schemaVersion in the database, run

dart run drift_dev schema dump lib/database.dart drift_migrations/

Generating test code

Run

dart run drift_dev schema generate drift_migrations/ test/generated/ --data-classes --companions

We're also using test code inside lib/ to run migrations with older definitions of tables. This isn't required for all migrations, but can be useful in some cases.

dart run drift_dev schema generate drift_migrations/ lib/src/generated