how to detect RAILS_ENV in pure js file?

rubyonrails-talk
1

I need to check Rails running environment type in a js file such as application.js. I can check that like " if RAILS_ENV == 'development' ..." in a .rb/.rhtml/.rjs,but I need to do the detection in a pure javascript file.

I try these first (append to application.js): function appEnv(env) {   var current_env = '';   var scripts = $$('script[src="applications.js"]');   if(scripts.first())   {

    current_env = 'production';   }   else   {     current_env = 'development';   }   return (env ? current_env == env.toLowerCase() : current_env ); }

then I use it as: if(appEnv('development')) {    // do sth }

or

if(appEnv() == 'production' ) {     // do sth }

but when I change the server running under production type.I found the scripts' src still output with a time stamp string like : <script src="/javascripts/application.js?1184146500" type="text/ javascript"></script>

not my expect as: <script src="/javascripts/application.js" type="text/javascript"></

I don't want to put sth in the layout files like: <script>var current_env = ''<%= RAILS_ENV -%>';</script>

because I have many layout files, that would be a hell if have to change each one .

I have an idea is to cover the "javascript_path" helper, to add some attribute make it return as: <script src="/javascripts/application.js?1184146500" type="text/ javascript" env="development"></script>

Then I could check that tag with js. But I don't how to .

Any suggestion?

-RainChen

2

You can do javascript_include_tag('application', :class => RAILS_ENV)

I'm pretty sure "env" is not a valid attribute for script tags, but that only matters if you're a purist.

3

I dont what to modify each layout file.Is there a better way?