irbrc/pryrc debugging (see https://www.strongopinionsweaklytyped.com/blog/2013/03/17/simple-active-record-query-debugging-in-the-rails-console/)

.irbrc

def add_debugger(clazz, method)
  debugger_method = binding.respond_to?(:pry) ? 'binding.pry' : 'byebug'

  unless clazz.method_defined? "#{method}_with_debugger"
    clazz.class_eval <<-CODE, __FILE__, __LINE__ + 1
      def #{method}_with_debugger(*args, &block)
        #{debugger_method}
        #{method}_without_debugger(*args, &block)
      end
      alias_method_chain :#{method}, :debugger
    CODE
  end
end
def remove_debugger(clazz, method)
  return unless clazz.method_defined? "#{method}_with_debugger"

  clazz.class_eval do
    alias_method method, "#{method}_without_debugger"
    undef_method "#{method}_with_debugger"
    undef_method "#{method}_without_debugger"
  end
end

# add_debugger MyModel.singleton_class, :create
# remove_debugger MyModel.singleton_class, :create