validates_attachment_presence not working

[Marcus Mansur]

Hi, my avatar model has_attached_file :attach,
:styles => {:original => "70x77"},
:path => ":rails_root/public/uploads/
avatar/:id.:extension",
:url => "/uploads/avatar/:id.:extension"

and validates_attachment_presence :attach

but when i do something like this:

a = Avatar.new
a.save

the record is saved :O

[Neil Brown]

I have the same problem. My model has:

has_attached_file :blob
validates_attachment_presence :blob, :message => "No file uploaded"

But when I create a new instance of the model without uploading a
file, the validation passes. This is with paperclip version 2.3.1.1.
Is there a workaround - can I write my own validation to check if a
file has actually been supplied?