Process completion notification

[mhuggins]

This should be tagged as a feature request, but there doesn't appear to be a list of tags when opening an issue for delayed_paperclip.

It would be nice to have a way to know when the image is finished processing. This would allow websites, for example, to render a placeholder loading spinner after an image is submitted, allowing the spinner to be replaced by the true image via AJAX when it is done processing and available for display.

[cristianbica]

You have 2 options here:

1. You can define an boolena attribute "#{attachment_name}_processing" on your model which will be updated when the post process will finish. See the code https://github.com/jstorimer/delayed_paperclip/blob/master/lib/delayed_paperclip/attachment.rb#L52.
2. You can use the paperclip's callbacks (before_post_process and after_post_process). At https://github.com/thoughtbot/paperclip search for events. I used those events a while ago and I remember that I run into some troubles when trying to change the model data with callbacks in the post_process callback

[jrgifford]

@cristianbica is correct on that from what I'm seeing.