January 28, 2010

Paperclip - attachment validations

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Using Paperclip, if you need to check if your model has an attachment, you don't use the standard ActiveRecord validation helper i.e.;

Erroneous!

Instead you use Paperclip's helper

But be sure to put that after your attachment definition

And if you're doing something tricky, like allowing your model to be saved without an attachment first, but enforcing that an attachment is present on update then;