从Helper渲染产生“缺少模板”错误

Question

In my coupons view, I call a method in helpers/coupons_helper.rb, which in turn invokes a partial with the intent of returning it's output. But I receive a "Missing Template" error. Here is the relevant code:

views/coupons/show.html.erb:
  ...
  <%= form_for(@coupon) do |f| %>
    <% new_include(f) %>
  <% end %>

helpers/coupons_helper.rb:
  def new_include(f)
    new_object = Participation.new
    fields = f.fields_for(:participation, new_object, :child_index => :new_include) do |builder|
      render "_locations_include", :f => builder
    end
  end

views/coupons/_locations_include.html.erb:
  Include: <%= f.select :participant_id, @groups %><br>

And the error message is:

Missing partial coupons/_locations_include with {:handlers=>[:erb, :builder, :rjs, :rhtml, :rxml], :formats=>[:html], :locale=>[:en, :en]} in view paths "/Users/jackrg/Documents/YummiApps/yummi1/app/views"

The problem turned out to be the leading "_" in the "render" in "new_include". Problem solved.

Answer 1

You don't prefix the underscore in your render call:

render "locations_include", :f => builder

On a side-note, it's probably a bit superfluous to add an _include suffix to the file name, since .erb files beginning with an underscore imply that it's a partial.