Question

I am attempting to use an object’s parameter in a link_to as follows:

<% @step.images.each do |pic| %>
     <script>
        alert(<%=pic.id%>);
     </script>

     <li class = "span2" id="picture_<%=pic.id %>">
         <div class="thumbnail">
             <%=image_tag(pic.url.to_s, :width => "100%") %>
                  <p style="text-align: center;">
              <!-- ERROR ON LINE BELOW FOR LINK_TO PATH -->
              <%= link_to edit_step_image_path("<%=pic.id%>"), :class=> "btn btn-mini" do %>
                   <i class="icon-edit"></i>
              <% end %>

              <a href="#" class="btn btn-mini btn-delete" confirm="Are you sure you want to delete this photo?" data-method="delete">
                <i class="icon-trash"></i>
             </a>
        </div>
    </li>
<% end %>

I checked that my alert does pass the right id, but when I attempt to use the pic.id in my link_to, I get a syntax error. Removing the parenthetical around <%=pic.id%> gets rid of the error but gives me the wrong id.

How might I fix this?

Answer 1

You’re trying to interpolate ERB inside ERB, which just won’t work. You’re already in Ruby code, so just write Ruby! Instead use this:

<%= link_to edit_step_image_path(pic.id), :class=> "btn btn-mini" do %>