How to log user_name in Rails?

Question

I use Devise in Rails 3. I want to see name of current_user in production.log.

I would like to configure rails like this:

config.log_tags = [:user_na         


        

Answer 1

I used this solution from Wojtek Kruszewski: https://gist.github.com/WojtekKruszewski

I tweaked a little bit for my project to only include id, but basically the same.

# config/application.rb

config.log_tags = [
  ->(req){
    if user_id = WardenTaggedLogger.extract_user_id_from_request(req)
      user_id.to_s
    else
      "?"
    end
  }
]

And create this initializer

# initializers/warden_tagged_logger.rb

module WardenTaggedLogger
  def self.extract_user_id_from_request(req)
    session_key = Rails.application.config.session_options[:key]
    session_data = req.cookie_jar.encrypted[session_key]
    warden_data = session_data["warden.user.user.key"]
    warden_data[0][0]
    rescue
      nil
  end
end