engines/pco/lib/pco/engine.rb
module PCO
class Engine < ::Rails::Engine
isolate_namespace PCO
initializer :append_migrations do |app|
unless app.root.to_s.match root.to_s
config.paths["db/migrate"].expanded.each do |expanded_path|
app.config.paths["db/migrate"] << expanded_path
end
end
end
end
end