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I would like to use some erb in my .coffee files, like the following example
myLatlng: new google.maps.LatLng(<%=@location.latitude %>, <%=@location.longitude %>)
I renamed my locations.js.coffee to locations.erb.coffee
but I still get the following error
Error compiling asset application.js:
ExecJS::ProgramError: Error: Parse error on line 4: Unexpected 'COMPARE'
(in /Users/denisjacquemin/Documents/code/projects/geolog/app/assets/javascripts/locations.erb.coffee)
Served asset /application.js - 500 Internal Server Error
In Rails 3.2.8, I didn't have to move my .coffee file to /app/views. I just added .erb to the filename and left it in /app/assets/javascripts. Ie. I changed
and then this worked:
(The indentation level has to match in CoffeeScript, not Ruby.) Enjoy your coffee embedded in rubies.
I agree with Ciro Centelli to leave the asset pipeline alone, especially if you are using Heroku. No doubt
gonis useful if you need to many assignments, but you can also do this without a gem. In your html includeand in your coffee file
You can often work around other needs in a similar fashion. For instance if you do not want the coffee script to trigger on an element with particular id, then in the html use erb to only add that id when you want it triggered.
You may have to rename your file to locations.coffee.erb so erb is processed before coffee :)
Stick to the asset pipeline when possible in Rails 4, instead of using a
js.erbview.Pass variables to the Js using gon or some other technique discussed at: Ruby on Rails - Send JavaScript variable from controller to external Javascript asset file
With
gon:app/views/layouts/application.html.erb:
app/controllers/application_controller.rb:
app/assets/javascripts/locations.js.coffee:
This method is faster because file is precompiled only once at startup, gets served by the server instead of through Rails, and on the same HTTP request as the rest of the Js.
If you want erb in the
.coffeefiles IN YOUR VIEW folder, leave your file named asyourfilename.js.coffee, and Rails will still process the ERB, oddly enough.To make it work in Heroku, move coffee-rails out of the assets group in your Gemfile.