Rebase Migrations

Rebase Migrations is a library and command line tool to rebase Rails migrations to have the latest timestamp.

Installation

$ bundle add rebase-migrations --group=development,test

Scenario

Two team members, Alice and Bob, are working on the same Rails project and both are adding new database migrations. Alice realizes her migration depends on Bob's, but the migration timestamps are out of order. The rebase-migration command line tool can be used to reorder Alice's new migrations to have the latest timestamp in the sequence.

Usage

To rebase all new migrations with respect to the main git branch:

$ bundle exec rebase-migrations

To rebase all new migrations with respect to a different branch:

$ bundle exec rebase-migrations my-branch

The command has a --check argument that is useful for CI. To check that all new migrations are the latest in the sequence:

$ bundle exec rebase-migrations --check

It will exit with status code 1 if the check fails. The --check form also accepts a branch argument.

Skipping Migrations

To skip a specific migration files from the --check include _skip_rebase in its filename.