Refile's attachment_field doesn't work inside my engine about refile HOT 7 CLOSED

Tricky. I have no idea how engines work. Could it be that they somehow end up using a different form builder? I'm afraid I'm not much help on this one.

from refile.

I looked at this a bit and it's not that the form builder helper isn't available; it is. It's the helper the form builder helper calls that isn't available, the @template.attachment_field here:

def attachment_field(method, options = {})
  self.multipart = true
  @template.attachment_field(@object_name, method, objectify_options(options))
end

None of the helpers defined in app/helpers/attachment_helper.rb seem to be available inside another engine.

from refile.

That being said, it's not difficult to include it yourself:

module Blorg
  class ApplicationController < ActionController::Base
    helper AttachmentHelper
  end
end

from refile.

There is, however, another issue with the helpers, from an engine perspective. The attachment_url helper calls refile_app_path. Because refile mounts itself at /attachments within Rails.application.routes, the path is only available through the main app.

That is, within another engine, you would have to refer to the refile path as main_app.refile_app_path.

from refile.

Which is also quite simple to fix yourself, by delegation:

module Blorg
  module ApplicationHelper
    def refile_app_path
      main_app.refile_app_path
    end
  end
end

However, these things should perhaps be made to work out of the box?

from refile.

I'm not sure. Does main_app work outside engines as well? If it does, then adding it is no harm, I guess. As for including the helper, I doubt there's really anything we can do there which isn't super hacky, so I'd rather not.

from refile.

Yes I believe main_app is always defined.

from refile.