Using partial with a dynamic name

[Sephi-Chan]

Hello,

In my application, I want to render a template with a dynamic name. The goal is to render a recursive structure, for a Javascript tree plugin.

Here is the template rendered by Gon.

json.tree do
  @elements.each do |element|
    json.set!(element.name) do
      ojbect_name = element.class.to_s.underscore # 'folder' or 'document'.
      json.partial!("intranet/documents/#{ojbect_name}", ojbect_name.to_sym => element)
    end
  end
end

Reading the source code, I have seen multiple reasons preventing it from working:

• Gon tests the path statically (performing no interpolation) ;
• Gon supports only name with 1 or 2 components (foo or foo/bar, no foo/bar/baz) ;

Then, even with a more statical approach like:

json.tree do
  @elements.each do |element|
    json.set!(element.name) do
      object_name = element.class.to_s.underscore

      if object_name == 'folder'
        json.partial! 'app/views/intranet/documents/_folder.json.jbuilder', folder: element
      else
        json.partial! 'app/views/intranet/documents/_document.json.jbuilder', document: element
      end
    end
  end
end

It still doesn't work since the eval in set_options_from_hash can't find local variable.

What do you suggest for cases like this?

I would be glad to contribute to Gon for it to be more dynamic, but it's a hard topic on which I have not much leads. Do you have projects about that or leads for me to work on it?

[gazay]

Hello! Interesting case! Yeah, gon jbuilder now is not really dynamic and fully compatible. I think we can try to do something like done here https://github.com/gazay/gon/blob/master/lib/gon/jbuilder.rb#L61. But I'm not sure yet.