How to pass parameter to Concern for model in ROR?

Question

Ruby on Rails

There is, for example, a certain function in concern that should take a parameter from the model in which it was connected, how best to do this?
For example:
concern:

module Fields
  extend ActiveSupport::Concern

  def set_fields
    self.fields(variable_from_model).each do |f|
      # some code
    end
  end

Model:

class User < ActiveRecord::Base
  include ::Fields
  variable_from_model= 'user'
end

Here's how to pass such a variable to concern in order to make the correct fetch from the database, i.e. each model inserts its value into variable_from_model

Answer 1

Everything turned out to be easy!

module Fields
  extend ActiveSupport::Concern

  included do
    class_attribute :entity
  end

  def set_fields
    self.fields(self.class.entity).each do |f|
      # some code
    end
  end

class User < ActiveRecord::Base
  include ::Fields
  self.entity = 1
end