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Migrate or revert only some migrations

To only run the next two migrations:

rake db:migrate STEP=2

To revert the previous two migrations:

rake db:rollback STEP=2

To revert the last two migrations and then migrate to the most current version:

rake db:migrate:redo STEP=2

To migrate to a given migration number, regardless of whether that means migrating up or down:

rake db:migrate VERSION=20100627185630

To migrate exactly one individual migration out of the sequence* (careful):

rake db:migrate:up VERSION=20100627185630

To revert exactly one individual migration out of the sequence* (careful):

rake db:migrate:down VERSION=20100627185630

*) These migrations must (not) have been processed before (contained/not contained in the schema_migrations table) or nothing will happen.

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Author of this card:

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Henning Koch
Keywords:
database, table, column, up, down, single
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code

License for source code

All source code included in the card Migrate or revert only some migrations is licensed under the license stated below. This includes both code snippets embedded in the card text and code that is included as a file attachment. Excepted from this license are code snippets that are explicitely marked as citations from another source.

The MIT License (MIT)

Copyright (c) 2010-2012 makandra GmbH

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Posted by Henning Koch to makandropedia