I want to set a global constant (in Rails) and then depending on that I want to put a condition in a JavaScript file (which is included in every page of my app). I also have some Rails dependent code based on this variable.
What is the best way to do this ?
In application_controller.rb
def before_filter
# This variable will be available in all controller actions and views
@my_global = "testing"
end
In application.html.erb
<script type="text/javascript">
var my_global = "<%= @my_global %>"
</script>
You can define a global variable like: window.profileName = 'Shikher';. Or in case you need several global variables I'd suggest to create a scope:
var Globals = {};
Globals.profileName = '<%= @user.profile_name %>';
and somewhere else
Globals.userId = '<%= @user.id %>';
In case you will use it everywhere you can insert the globals defenition right in the layout file.
you can use this gem http://github.com/ejschmitt/jsvars to define javascript vars via ruby and then use them in you js
