ruby - Overriding a method from a gem with a condition in Rails 4 -

i using gritter gem displaying simple notifications in rails app. in controllers use gflash method later adds notification in view so:

gflash notification: "welcome awesome website!" 

now problem making different views mobile, , need override this method located in gflash module. want looks this:

if browser mobile browser   else   use original gflash method in gritter::gflash end 

so added initializer in config/initializers/custom_gritter.rb:

gritter::gflash.module_eval     def gflash *args             @@mobile_notifications == [] ? @@mobile_notifications.push(args[0][:notice]) : @@mobile_notifications = [args[0][:notice]]     end      def self.mobile_notifications         @@mobile_notifications ||= []     end      def self.reset_mobile_notifications         @@mobile_notifications = nil     end end 

this allows me have access user notifications in controllers or views , works fine:

gritter::gflash.mobile_notifications 

but still have make sure overrides if user has mobile device changed custom_gritter.rb file to:

gritter::gflash.module_eval     alias_method :original_gflash, :gflash     def gflash *args         puts "override works"         if browser.mobile?             puts "detected mobile browser"             @@mobile_notifications == [] ? @@mobile_notifications.push(args[0][:notice]) : @@mobile_notifications = [args[0][:notice]]         else             original_gflash         end     end      def self.mobile_notifications         @@mobile_notifications ||= []     end      def self.reset_mobile_notifications         @@mobile_notifications = nil     end end 

in terminal see "override works" don't see "detected mobile browser" means condition doesn't work. browser.mobile? method provided browser gem. used is_mobile_request? method the mobylette gem have exact same issue.

why isn't working? module have access methods in other gems? bad approach solve problem ? suggestion/idea appreciated, in advance !

update: don't have error means considers browser.mobile? false when i'm opening browser on mobile( chrome). confirm adding puts "not mobile browser" after else statement, appeared in terminal.

any idea why browser.mobile? returns true in controller , false in module?