Question

I have rebuilt a project. I’ve migrated databases and now I need to transfer files. I can’t just copy paste them. I need to reprocess them.

How can I load two Rails apps in console (or Rake Task) and work like that:

App1.attaches.all.each do |attach|
  new = App2.attach.new attach.attributes
  new.file = attach.file.url
  new.save
end

Answer 1

I’d add a temporary model to the new application. If you have a model Asset, I’d add

class LegacyAsset < ActiveRecord::Base
    establish_connection (
        # connection credentials for old application
    )
end

Then you can use both models to convert the data and delete the LegacyAsset model after you’re done.