Deleting Attachments with rails_admin

If you want to be able to delete an attachment or a file upload associated with rails_admin you can by making some pretty tiny changes to your model.

The first thing you want to do is let your model know there is a parameter it wants to look for, this parameter should be named :delete_#{name_of_attachment}, for example;

attr_accessor :delete_attachment

Next up we need to set up something to catch this being set by rails_admin and handle it appropriately. You can do this with one line;

before_validation { attachment.clear if delete_attachment == '1' }

The attachment.clear is how paperclip deals with items to be removed, but you can change this to whatever you want.

Thats it! Unfortunately I couldn’t find this documented anywhere so it took me longer than I would care to admit.

Recent posts View all

Hosting

Website Checklist before Launching

Top 20 things to consider before launching your website

Tech

Getting wireless printing working on Virgin Media Hub 3

A guide on how to get wireless printing working on Virgin Media if yours has suddenly stopped working.