Fix unprecise MySQL dates for active record

active_record_monkey_patch.rb

class ActiveRecord::Base

  DATE_FIELDS = [:created_at, :updated_at]

  after_save :make_dates_less_precise

  def make_dates_less_precise
    DATE_FIELDS.each do |date_field|
      if respond_to? date_field
        time = self.send(date_field)
        write_attribute(date_field, Time.at(time.to_i)) unless time.nil?
      end
    end
  end
end

active_record_monkey_patch_spec.rb

require 'spec_helper'

describe "MonkeyPatch MySQL imprecise dates" do
  context "given a newly saved model" do
    before do
      @object = Factory :user
    end

    it "has dates that are equal to the looked up object" do
      User.find(@object.to_param).created_at == @object.created_at
    end
  end
end