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POCarrierWave can't convert nil into String
 

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  1. POCarrierWave can't convert nil into String
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    <p>I just want to do a simpel image upload with carrierwave, uploading works so far(at least that's what I think), but when I try to get the image with </p> <pre><code>on "/entries" do entries = Entry.all entries.each do |entry| @foobar = "#{@foobar} entry.image.url" end "#{@foobar}" end </code></pre> <p>I just get the following error</p> <pre><code>TypeError - can't convert nil into String: /home/peer/.gem/ruby/1.9.1/gems/carrierwave-0.6.2/lib/carrierwave/uploader/url.rb:22:in `expand_path' /home/peer/.gem/ruby/1.9.1/gems/carrierwave-0.6.2/lib/carrierwave/uploader/url.rb:22:in `url' /home/peer/.gem/ruby/1.9.1/gems/carrierwave-0.6.2/lib/carrierwave/uploader/versions.rb:159:in `url' /home/peer/.gem/ruby/1.9.1/gems/carrierwave-0.6.2/lib/carrierwave/uploader/default_url.rb:8:in `url' /home/peer/.gem/ruby/1.9.1/gems/carrierwave-0.6.2/lib/carrierwave/uploader/url.rb:27:in `to_s' /home/peer/Project/myapp/controllers/view_entries.rb:4:in `block in &lt;top (required)&gt;' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:1212:in `call' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:1212:in `block in compile!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:785:in `[]' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:785:in `block (3 levels) in route!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:801:in `route_eval' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:785:in `block (2 levels) in route!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:822:in `block in process_route' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:820:in `catch' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:820:in `process_route' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:784:in `block in route!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:783:in `each' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:783:in `route!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:886:in `dispatch!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:719:in `block in call!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:871:in `block in invoke' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:871:in `catch' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:871:in `invoke' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:719:in `call!' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:705:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/xss_header.rb:22:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/base.rb:47:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/base.rb:47:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/path_traversal.rb:16:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/json_csrf.rb:17:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/base.rb:47:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-protection-1.2.0/lib/rack/protection/xss_header.rb:22:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/session/abstract/id.rb:205:in `context' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/session/abstract/id.rb:200:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/logger.rb:15:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/head.rb:9:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/methodoverride.rb:21:in `call' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/showexceptions.rb:21:in `call' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:1334:in `block in call' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:1416:in `synchronize' /home/peer/.gem/ruby/1.9.1/gems/sinatra-1.3.2/lib/sinatra/base.rb:1334:in `call' /home/peer/.gem/ruby/1.9.1/gems/rack-1.4.1/lib/rack/handler/webrick.rb:59:in `service' /usr/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' /usr/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' /usr/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' </code></pre> <p>Here is my entry model:</p> <pre><code>class ImageUploader &lt; CarrierWave::Uploader::Base def store_dir "public/user_uploads" end def extensions_white_list %w(jpg jpeg gif png) end storage :file end class Entry include DataMapper::Resource property :id, Serial property :text, Text property :created_at, String mount_uploader :image, ImageUploader belongs_to :user end </code></pre> <p>So I have absolutly no idea what is wrong here...</p> <p><strong>Why is it not possible to get the url of the image?</strong></p>
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