A DRY way to deal with strong parameters in Ruby on Rails 4 together with the excellent gem decent_exposure

params_for.rb

module ParamsFor
  def params_for(model, *attributes)
    return if method_defined? "#{model}_params"

    define_method "#{model}_params" do
      params.require(model).permit attributes
    end
  end
end

# class ApplicationController < ActionController::Base
#   extend ::ParamsFor
#
#   decent_configuration do
#     strategy DecentExposure::StrongParametersStrategy
#   end
# end

# class UsersController < ApplicationController
#   expose :user, attributes: :user_params
#
#   params_for :user, :name, :email
# end