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POUsing Paperclip expiring_url with S3 :permission => :private
 

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    <p>I am creating a Rails app where a User uploads a file to S3 using Paperclip and which then a separate group can download the uploaded files. I need the files to be private and have been trying to use :permissions => :private without any luck, but can upload and download files in a with this turned off.</p> <p>I have been following the github issue: <a href="https://github.com/thoughtbot/paperclip/wiki/Restricting-Access-to-Objects-Stored-on-Amazon-S3" rel="nofollow noreferrer">https://github.com/thoughtbot/paperclip/wiki/Restricting-Access-to-Objects-Stored-on-Amazon-S3</a> and <a href="https://stackoverflow.com/questions/3897837/rails-3-paperclip-s3-howto-store-for-an-instance-and-protect-access">Rails 3, paperclip + S3 - Howto Store for an Instance and Protect Access</a> but am still stuck and would appreciate some help. Here is what I have so far:</p> <p><strong>model/user.rb</strong></p> <pre><code>class User &lt; ActiveRecord::Base has_many :parts ... if Rails.env.development? has_attached_file :model else has_attached_file :model, :storage =&gt; :s3, :path =&gt; "files/:id/:basename.:extension", :default_url =&gt; '/images/missing_:style.jpg', :bucket =&gt; ENV['AWS_BUCKET'], :s3_permissions =&gt; :private, :s3_host_name =&gt; 's3-us-west-1.amazonaws.com', :s3_credentials =&gt; { :access_key_id =&gt; ENV['AWS_ACCESS_KEY_ID'], :secret_access_key =&gt; ENV['AWS_SECRET_ACCESS_KEY'] } end </code></pre> <p><strong>user_controller.rb</strong></p> <pre><code> def create @user = User.new(params[:user]) @part = Part.new if @user.save ... end end def download @user = User.find(params[:id]) redirect_to(@user.model.expiring_url(10)) end </code></pre> <p><strong>part_controller.rb</strong></p> <pre><code>class PartsController &lt; ApplicationController def index @parts = Part.all @users = User.all end end </code></pre> <p><strong>routes.rb</strong></p> <pre><code> match 'users/download' =&gt; 'users#download', :as =&gt; 'download_model' </code></pre> <p><strong>parts/index.html.erb</strong></p> <pre><code>&lt;p&gt; &lt;% @parts.each do |part| %&gt; &lt;p&gt;&lt;%= part.model_name %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;% @users.each do |user| %&gt; &lt;p&gt;&lt;%= link_to "Download", download_model_path(user) %&gt;&lt;/p&gt; &lt;% end %&gt; &lt;/p&gt; </code></pre>
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    1. COAre you sure this works? `if Rails.env.development? has_attached_file :model else`
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    2. COWhat is a problem? What do you mean by 'separate group'?
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