Question

I want Rails to inject different js files in development and production modes.

Example:

Development:

<script src="/javascripts/jquery.js" type="text/javascript"></script>
<script src="/javascripts/myscripts.js" type="text/javascript"></script>

Production:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script>
<script src="/javascripts/myscripts.min.js" type="text/javascript"></script>

Is it possible to achieve it in Rails 3?

Regards,
Alexey Zakharov

Answer 1

You could have a helper method load your js and perform the condition check as to which environment it is.

app/views/layouts/application.html.* (wherever you normally include your javascript)

load_javascript

app/helpers/application_helper.rb

def load_javascript
  if Rails.env.production?
    javascript_include_tag 'js1', 'js2', :cache => true
  else
    javascript_include_tag 'js3', 'js4'
  end
end

You could DRY it up a little further by having load_javascript only give you back a list of the files and have only one javascript_include_tag.