Uploadify + Paperclip + Rails nested association before

i need create model application form models can fill , add pictures it.

i'm following example uploadify, paperclip , rails 3 approach. https://github.com/websymphony/rails3-paperclip-uploadify

to pictures, have polymorphic attachment model , attach ajax uploaded attachments yet unsaved model form , there's tricky part cames.

users not logged, there's no "model_id" until saved.

since i'm showing user small preview of images uploaded in form ajax after each upload need way correlate them.

i thinking middle token until model saved i'm not sure whats best approach accomplish this.

thank you!

we dumped uploadify when moving rails 3 , using jquery-file-upload.

setting bunch of middleware nothing more upload files seems major hassle.

only problem jquery solution multiple uploads aren't supported in ie.

shell