Question

I have a create action that handles an AJAX request. On my development machine, a template named create.js.coffee is successfully processed to generate a javascript response. However, when I deploy to Heroku, the application complains that it can’t find the template.

ActionView::MissingTemplate (Missing template /expenses/create with {:handlers=>[:erb, :builder], :formats=>[:js, :html], :locale=>[:en, :en]}. Searched in:
* "/app/app/views"
* "/app"
* "/"
):

It’s clear that the coffee handler is not there to preprocess *.js.coffee template.

Can any one suggest how I can configure Heroku to recognize and process these templates?

Note: Heroku is successfully preprocessing my CoffeeScript files that are present in the asset pipeline.

Answer 1

I’m a bit late to the party, but here is my solution, as posted on Github.

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I just ran into a problem where my create.js.coffee file was working in development but stopped working in production (on Heroku). The logs show that Rails isn’t even looking for a coffee handler:

2011-10-14T08:26:29+00:00 app[web.1]: ActionView::MissingTemplate (Missing template page_blocks/create, application/create with {:handlers=>[:erb, :builder, :haml], :formats=>[:html, :text, :js, :css, :ics, :csv, :xml, :rss, :atom, :yaml, :multipart_form, :url_encoded_form, :json], :locale=>[:nl, :nl]}. Searched in:
2011-10-14T08:26:29+00:00 app[web.1]:   * "/app/app/views"
2011-10-14T08:26:29+00:00 app[web.1]: ):

This is the (important) part of my Gemfile:

group :assets do
  gem "sass-rails", "~> 3.1.0"
  gem "coffee-rails", "~> 3.1.0"
  gem "uglifier"
  gem "compass", "~> 0.12.alpha"
end

# asset templates
gem "jquery-rails"
gem "haml"

Only after I moved coffee-rails outside of the :assets group, things started working. Perhaps it would be a good idea to somehow make this clear in the readme, and perhaps even ship Rails with the coffee-rails plugin being placed outside the assets group.