https://github.com/svenfuchs/data_migrations

https://github.com/svenfuchs/data_migrations

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/svenfuchs/data_migrations
• Owner: svenfuchs
• License: mit
• Created: 2011-08-11T14:06:03.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2011-08-24T14:05:50.000Z (over 13 years ago)
• Last Synced: 2024-10-26T22:39:38.126Z (2 months ago)
• Language: Ruby
• Size: 105 KB
• Stars: 14
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# data\_migrations [![Build Status](https://secure.travis-ci.org/svenfuchs/data_migrations.png)](http://travis-ci.org/svenfuchs/data_migrations)

    class CreateBuilds < ActiveRecord::Migration

      def self.up

        create_table :tests do |t|

          # ...

        end

        migrate_table :builds, :to => :tests |t|

          t.where 'parent_id IS NULL'

          t.move :number

          t.copy :parent_id, :to => :build_id

          t.copy :commit, :result, :to => [:hash, :status]

          t.copy :all

          # t.copy :all, :except => :foo

          # t.exec 'UPDATE foo ...'

          # t.set :source, 'github'

        end

      end

      def self.down

        # revert the whole thing. not sure we can derive this automatically?

        migrate_table :builds, :to => :tests |t|

          t.move :number

          t.copy :build_id, :to => :parent_id

          t.copy :hash, :status, :to => [:commit, :result]

        end

        drop_table :tests

      end

    end