paperclip

I am using paperclip to handle my file uploads, and in one situation I don't want the file to be mandatory. I do however want to make sure it is a specific file type when it is present. I have this: class TestModel < ActiveRecord::Base #stuff has_attached_file :sound #etc... validates_attachment_content_type :sound, :content_type => ['audio/mp3', 'application/x-mp3'] end And when I have no sound file present, it tells me it is not one of the valid content types. I've tried adding '' to the :content_type array, which also doesn't work! I also attempted creating a lambda procedure for the :if

I want to make polymorphic associations with paperclip, and allow my user to have one avatar and multiple images. Attachment model: class Attachment < ActiveRecord::Base belongs_to :attachable, :polymorphic => true end class Avatar < Attachment has_attached_file :image, :styles => { :thumb => "150x150>", :view => "260x180>" }, end class Image < Attachment has_attached_file :image, :styles => { :thumb => "150x150>", :view => "260x180>" }, end User Model: has_one :avatar, :as => :attachable, :class_name => 'Attachment', :conditions => {:type => 'avatar'} accepts_nested_attributes_for :avatar

I'm having a hard time figuring out how to prevent Paperclip from deleting the old version of an attachment (image). I have a model, Site, which has an attachment, logo. I would like to keep the old logos around since I will be keeping track of changes to the model and would like to view the history of logos. I'm keeping track of the changes in another model, which has a reference to file paths. My problem is that when updating a site with a new logo, Paperclip will flush the old logo first. It surprises me that there's not an option you can switch to prevent Paperclip from flushing the old

I'm using Rails with Paperclip to make a small file upload app. I would like to be able to return the file path on the server of the uploaded file once its done but I can't seem to work out how to get the path? Paperclip only seems to record the name of the file itself. Does anybody now how to do this? Assuming you had an attachment called avatar on an instance of a user, you can use user.avatar.path to get the full path of the file on the filesystem, and you can use user.avatar.url to give the path which you could use in image tags and whatnot. Is that what you're meaning? I came cross the

so I've got paperclip set up with uploadify to upload things to S3. I have made my setup so that stuff gets loaded directly to S3 and then when it's done I post to my webserver the results... All I get back is the file name and size. am I supposed to build my own processor or before_post_process method to "download" the file from S3 in order to process it? or am I missing something and uploadify should have provided me a stream with the file inside it after it was done posting to S3? How do you guys go about direct uploads to S3 and then notifying your paperclip backed model? Do you have to