I know this is a general question, but there is an aspect to rails dev that I hope makes it appropriate to post here...
I'm building a FB App for a client using the Facebooker plugin. Because of the way FB restricts file uploads, I had a task to enable file uploads that required me to put an iframe in the FB canvas page for a form where I have the file_field and do the upload. That's working well now.
But, what I want to do is refresh a couple parts of the page after the upload completes (to indicate that the upload was successful w a flash msg and maybe display the thumbnail of the image uploaded).
I've tried to display set the flash from the controller action that receives the post of the upload, but what I've found is that the flash msg doesnt show in the surrounding canvas page around the iframe. I guess this is because the controller-view interaction here is for the iframe, not the whole page... right?
Also, I dont know how to get to the divs in that canvas page either to refresh them from the controller action.
So is it possible to 'address' divs in a containing page around an iframe, in general, and are there any twists with rails that make it possible or impossible?