Class | ActiveRecord::Migration::CommandRecorder |
In: |
lib/active_record/migration/command_recorder.rb
|
Parent: | Object |
ActiveRecord::Migration::CommandRecorder records commands done during a migration and knows how to reverse those commands. The CommandRecorder knows how to invert the following commands:
commands | [RW] | |
delegate | [RW] |
Returns a list that represents commands that are the inverse of the commands stored in commands. For example:
recorder.record(:rename_table, [:old, :new]) recorder.inverse # => [:rename_table, [:new, :old]]
This method will raise an IrreversibleMigration exception if it cannot invert the commands.
record command. command should be a method name and arguments. For example:
recorder.record(:method_name, [:arg1, arg2])