How to make Rails migration conditional to current RAILS_ENV?

Question

How do you fulfill the Rails migration condition in the current RAILS_ENV?

In particular, I want:

• Check transition to the main server
• Only migrate to our Stage instance

This will allow us to perform database updates — through the migrations that we only want in our intermediate environment. An example would be the activation of a function for a specific account or class of accounts for testing purposes.

Answer 1

Just use Rails.env.production? / Rails.env.<custom-env>? in their up / down class methods in Migration.