module ActiveModel::Validations::Comparability

def error_options(value, option_value)
  options.except(*COMPARE_CHECKS.keys).merge!(
    count: option_value,
    value: value
  )
end

def option_value(record, option_value)
  case option_value
  when Proc
    option_value.call(record)
  when Symbol
    record.send(option_value)
  else
    option_value
  end
end