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I would like to use some erb in my .coffee files, like the following example
myLatlng: new google.maps.LatLng(<%[email protected] %>, <%[email protected] %>)
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
981
If you want erb in the .coffee files IN YOUR VIEW folder, leave your file named as yourfilename.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.
181
You may have to rename your file to locations.coffee.erb so erb is processed before coffee :)
13
Stick to the asset pipeline when possible in Rails 4, instead of using a js.erb view.
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:
<head>
<meta charset="utf-8"/>
<%= include_gon %>
app/controllers/application_controller.rb:
before_filter do
gon.latitude = 0.1
gon.longitude = 0.2
end
app/assets/javascripts/locations.js.coffee:
myLatlng: new google.maps.LatLng(gon.latitude, gon.longitude)
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.
5
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