ruby - Store Global Variables for different environments in Rails -

In my rail application, I also try to test my call for Redis. For example, in my user model I have:

  def to show in self.add_to_visibles user # $ redis.lpush menu ("user_visibles", user.to_json (only: [: vorname : Now that I run this test, the test data is inserted into redis store  "user_visibles" .    This means that when I I am also on the development. I also get this figure. 
 
 That is why I want to change my method: 
 
  def self.add_to_visibles user #to $ in menu Show redis.lpush ($ u Ser_visibles, user.to_json (only: [: vorname,: nachname ,: id, created_at]) end  
 
 and  $ user_visibles : 
 
 For testing:  $ user_visibles = "user_visibles_test"  
 
 and for production  $ user_visibles = "user_visibles"  
 
 Where do I place this variable best? And how is it different for the environment? 
 

I do something like this:

config / user_variables.rb

  Rails.configuration.user_variable = YAML :: load_file ("# {Rails.root} / config / User_variables.yml ") [Rails.env]  

and thus created config / user_variables.yml

  Product: 'user_visibles' test: 'user_visibles_test'  

Remember to restart your server

Get value with .configuration.user_variable where you need it