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Editorial Team
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Asked: 2026-05-28T06:03:08+00:00

When I run this line of code in my view, <%= image_tag(item.picture.url(:medium), :class =>

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When I run this line of code in my view,

<%= image_tag(item.picture.url(:medium), :class => "iteminfo") %>

I get a 

 undefined method `symbolize_keys'

error. I’m currently using the paperclip gem with S3 storage. Any suggestions?

— Edit:

Here is what the server log says:

Started GET "/items/compare" for 127.0.0.1 at 2012-01-19 14:47:21 -0500
Processing by ItemsController#compare as HTML
(0.1ms)  SELECT items.id FROM "items" 
Item Load (0.2ms)  SELECT "items".* FROM "items" WHERE "items"."id" IN (3, 2)
Rendered items/compare.html.erb within layouts/application (37.3ms)
Completed 500 Internal Server Error in 99ms

ActionView::Template::Error (undefined method `symbolize_keys' for #<String:0x007f9ebccd92b0>):
3: <% @items.each do |item| %>
4:  <div class="item<%= loopcount %>">
5:      <% loopcount = loopcount +1%>
6:      <%= image_tag(item.picture.url(:medium), :class => "iteminfo") %> <blockquote>     </blockquote>
7:      <h2 class = "iteminfotext"><%= item.votes %></h2>
8:      <h1 class = "iteminfotext"><%= item.location %></h1>
9:      <div class="iteminfotext"><%= button_to "Vote", :action => "vote", :id => item.id, %></div>
app/views/items/compare.html.erb:6:in `block in _   app_views_items_compare_html_erb___818922328118740053_70159882605160'
app/views/items/compare.html.erb:3:in `each'
app/views/items/compare.html.erb:3:in `  _app_views_items_compare_html_erb___818922328118740053_70159882605160'

Rendered /Users/Alex/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-  3.1.3/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms)
Rendered /Users/Alex/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.8ms)
Rendered /Users/Alex/.rvm/gems/ruby-1.9.2-p290/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (3.8ms)
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1 Answer

  1. Editorial Team

    This is kind of a rails or paperclip issue. If you do 

    <%= image_tag(item.picture.url(:medium), :class => "iteminfo") %>

    it would not work unless you change it to a link like

    <%= link_to image_tag(item.picture.url(:medium), :class => "iteminfo"), item_path(item) %>

    else you would always be getting the

    undefined method `symbolize_keys'

    to avoid this, all you have to do is reconstruct your image tag block to look like this

     <%= image_tag(item.picture.url(:medium)), :class => "iteminfo" %>

    or

    <%= image_tag(item.picture(:medium)), :class => "iteminfo" %>

    then your problem is solved

    update:

    <%= image_tag item.picture.url(:medium), :class => "iteminfo" %>
<%= image_tag item.picture(:medium), :class => "iteminfo" %>
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