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| author | Aaron Patterson <aaron.patterson@gmail.com> | 2010-11-19 11:34:42 -0800 |
|---|---|---|
| committer | Aaron Patterson <aaron.patterson@gmail.com> | 2010-11-19 11:34:42 -0800 |
| commit | a4d9b1d329ef897f6b23216b01cb510db35a37b5 (patch) | |
| tree | 0d10011219516f2866c6fff0f74d881496845759 /activerecord/lib/active_record/migration/command_recorder.rb | |
| parent | db32b545dadae7808c210cd7ceef949a620490f0 (diff) | |
| download | rails-a4d9b1d329ef897f6b23216b01cb510db35a37b5.tar.gz rails-a4d9b1d329ef897f6b23216b01cb510db35a37b5.tar.bz2 rails-a4d9b1d329ef897f6b23216b01cb510db35a37b5.zip | |
adding documentation for reversible migrations
Diffstat (limited to 'activerecord/lib/active_record/migration/command_recorder.rb')
| -rw-r--r-- | activerecord/lib/active_record/migration/command_recorder.rb | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/migration/command_recorder.rb b/activerecord/lib/active_record/migration/command_recorder.rb index fc669d2e89..d7e481905a 100644 --- a/activerecord/lib/active_record/migration/command_recorder.rb +++ b/activerecord/lib/active_record/migration/command_recorder.rb @@ -1,7 +1,17 @@ module ActiveRecord class Migration # ActiveRecord::Migration::CommandRecorder records commands done during - # a migration and knows how to reverse those commands. + # a migration and knows how to reverse those commands. The CommandRecorder + # knows how to invert the following commands: + # + # * add_column + # * add_index + # * add_timestamp + # * create_table + # * remove_timestamps + # * rename_column + # * rename_index + # * rename_table class CommandRecorder attr_accessor :commands, :delegate |