require an attachment using paperclip

[hobo_hippy]

So it's pretty clear you can require a field like title below:


fields do
timestamps
title :string, :required
event :string
end

but what if I wanted to require an attachment using paperclip-with-
hobo?

I already have an photo attachment setup as below:

has_attached_file :photo, :default_url => "/images/blah.jpg"


but I have no idea how to REQUIRE that a user uploads an image. Any
ideas? possible solutions?

[Henry Baragar]

validates_presence_of :photo

But, this does not guarantee that what is uploaded actually is an image.

Henry

--

Henry Baragar

Instantiated Software

[Matt Jones]

:required on a field is really just a shorthand for validates_presence_of (a standard AR validation). There are some attachment-specific validations in Paperclip, but they apparently aren't cool enough to mention in the README. Here's the rdoc:

http://rdoc.info/gems/paperclip/2.3.12/Paperclip/ClassMethods

--Matt Jones

[kevinpfromnm]

validates_attachment_content_type :image, :content_type => /image\//

[hobo_hippy]

COOL!~

thanks for the link to the rdoc

-HoboHippy

[hobo_hippy]

actually i tried the validates_presence_of :photo, but no luck. it
doesn't throw an error, but I can still submit a new model without
uploading a photo... weird