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POCarrierWave and Nested Form Gem Redisplay :: HTML File Input Icon
 

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    <p>I'm using CarrierWave and Nested Form Gem. Using the section titled 'Making uploads work across form redisplays' on the Carrierwave github page(https://github.com/jnicklas/carrierwave) I'm able to successfully store the cache so that even if the user makes a mistake then the file is saved. The first time I hit the page and click "Upload File" it works and shows the name of the file as well as a small thumbnail icon indicating the type of file that has been uploaded.</p> <p>However the file input button is blank upon a redisplay and the icon is gone. However I know it's there because if I submit again with valid information and leave the file input button alone it creates a new resource. Here's a snippet of my code.</p> <pre><code>&lt;%= nested_form_for @resource, :html=&gt;{:multipart =&gt; true } do |f| %&gt; &lt;p&gt; &lt;%= f.label :title %&gt;&lt;br /&gt; &lt;%= f.text_field :title %&gt; &lt;/p&gt; &lt;%= f.fields_for :attachments do |attachment_form| %&gt; &lt;p&gt; &lt;%= attachment_form.label :file %&gt; &lt;% if !attachment_form.object.file.path.blank? %&gt; &lt;% file_info = get_cache_file_info attachment_form.object.file.path %&gt; &lt;%= image_tag(File.join('/tmp/cache/', file_info[:folder])) #THIS DISPLAY CORRECTLY %&gt; &lt;% end %&gt; &lt;%= attachment_form.file_field :file %&gt; &lt;%= attachment_form.hidden_field :file_cache %&gt; &lt;/p&gt; &lt;%= attachment_form.link_to_remove "Remove this attachment" %&gt; &lt;% end %&gt; &lt;%= f.link_to_add "Add attachment", :attachments %&gt; &lt;p&gt;&lt;%= f.submit %&gt;&lt;/p&gt; &lt;% end %&gt; </code></pre> <p>I'm wondering if I have to edit the HTML file input to display the icon or is there some other Rails Way to take care of this. Also the image_tag display correctly, but for my application having users upload text files so the images aren't very helpful.</p> <p>Thanks in advance!</p> <p><b>Update</b> I also tried setting the value of the 'input' tag like so:</p> <pre><code>&lt;%= attachment_form.file_field :file, :value =&gt; "#{File.join(file_info[:folder], '/',attachment_form.object.file.identifier)}" %&gt; </code></pre> <p>and that didn't work either. The value of the 'input' tag is set correctly, but it still shows up as "No file selected"</p>
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