How do I check the Database type in a Rails Migration?

Question

I have the following migration and I want to be able to check if the current database related to the environment is a mysql database. If it\'s mysql then I want to execute

Answer 1

There is an adapter_name in AbstractAdapter and that is there since Rails2.

So it's easier to use in the migration like this:

adapter_type = connection.adapter_name.downcase.to_sym
case adapter_type
when :mysql, :mysql2
  # do the MySQL part
when :sqlite
  # do the SQLite3 part
when :postgresql
  # etc.
else
  raise NotImplementedError, "Unknown adapter type '#{adapter_type}'"
end