Creating MySQL triggers using DataMapper

问题

I've been trying to search and figure this on my own, but no luck so far :(

I'd like to create MySQL triggers using DataMapper (or any other Ruby db adapter). Is this possible?

I'd really like to have the triggers become part of my code versioning (for documentation and maintenance).

回答1:

Simply execute arbitrary SQL in your migrations

migration 1, :create_people_table do
  up do
    execute 'CREATE TRIGGER ...'
  end
  down do
    execute 'DROP TRIGGER ...'
  end
end

Of course, it won't be terribly portable.

http://rubydoc.info/gems/dm-migrations/1.1.0/DataMapper/Migration:execute

来源：https://stackoverflow.com/questions/5336424/creating-mysql-triggers-using-datamapper