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I'm trying to make a simple link that when clicked initiates the download of a document associated with a particular resource. I have a Resource model and in that model there is a column called "document". I am able to successfully view the document inline when the link is clicked, but I would prefer to download it. I have been reading about content-types and send_file, but I haven't been able to completely piece this together to function. Here is the code that I think I need to use for the link: <%= link_to 'Download File', :action => "download_file" %> This throws an error: ActiveRecord::RecordNotFound in ResourcesController#show Couldn't find Resource with id=download_file When I change the link to this, it opens the file in the browser: <%= link_to 'Open file', resource.document_url, :target => "_blank" %> In my ResourcesController I have this method defined: def download_file @resource = Resource.find(params[:id]) send_file(@resource.file.path, :filename => @resource.file.name, :type => @resource.file.content_type, :disposition => 'attachment', :url_based_filename => true) end I have a route set up in routes.rb like this: resources :resources do get 'resources', :on => :collection end So based upon this error, it would seem that my download_file method in ResourcesController is not able to determine the id of the resource record that the document is associated with. I'm running: Rails 3.2.11 Carrierwave 0.8.0 Ruby 1.9.3-p194 I would appreciate some insight into this. I have searched a number of articles and was not able to find a simple tutorial. Thanks.

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