class Shoulda::ActiveRecord::Matchers::HaveDbColumnMatcher

def correct_precision?
  return true if @precision.nil?
  if matched_column.precision.to_s == @precision.to_s
    true
  else
    @missing = "#{model_class} has a db column named #{@column} " <<
               "of precision #{matched_column.precision}, " <<
               "not #{@precision}."
    false
  end
end