Can't upload zip files using ruby on rails and paperclip gem

问题

I'm working on a rails web application. Just created and prepared some models and stuff. The application is very simple. But now I have a problem by setting up the gem paperclip to add attachments to a model. Almost everything works fine, like attaching images/jpg or even pdf.

But I can't upload zip files. I tried different zip files, but I'm always getting: "Attachment Paperclip::Errors::NotIdentifiedByImageMagickError"

This is my model:

class Order < ActiveRecord::Base
  has_attached_file :attachment, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png"
  validates_attachment_content_type :attachment, :content_type => ["application/pdf", "application/zip", "application/x-zip", "application/x-zip-compressed","application/octet-stream","image/jpg","image/png"]
  belongs_to :client
  has_one :status
end

I'm developing on a Mac (Yosemite), installed imagemagick via brew and using SQLite.

I added this to my Gemfile:

gem "paperclip", "~> 4.2"
gem 'cocaine', '~> 0.5.4'

I did research on google the last hours, and there are many people struggling with paperclip, but I didn't find anybody with problems uploading zip files.

Maybe someone can help here. Thanks

回答1:

ImageMagick can't read .zip files. See the acceptable file types here:

http://www.imagemagick.org/script/formats.php

If you're trying to generate a thumbnail from a zip file ImageMagick should fail every time.

Try adding this to your model:

before_post_process :skip_for_zip

def skip_for_zip
   ! %w(application/zip application/x-zip).include?(asset_content_type)
end

Then your app won't try to process zip files as images

来源：https://stackoverflow.com/questions/27049504/cant-upload-zip-files-using-ruby-on-rails-and-paperclip-gem