components/email_signup/lib/email_signup/engine.rb
module EmailSignup
class Engine < ::Rails::Engine
isolate_namespace EmailSignup
initializer :append_migrations do |app|
unless app.root.to_s.match root.to_s + File::SEPARATOR
config.paths["db/migrate"].expanded.each do |path|
app.config.paths["db/migrate"] << path
end
end
end
end
end