validation of type column

gistfile1.txt

  module Types
    FULL_TIME_ONSITE = 'Full Time - On-Site'
    FULL_TIME_REMOTE = 'Full Time - Remote'
    PART_TIME = 'Part-Time'
    CONTRACT = 'Contract'
    UNKNOWN = 'unknown'
  end
  JOB_POSTING_TYPES = [ Types::FULL_TIME_ONSITE, Types::FULL_TIME_REMOTE, Types::PART_TIME, Types::CONTRACT, Types::UNKNOWN ]
  validates :job_posting_type, :inclusion => { :in => JOB_POSTING_TYPES, :message => "%{value} is not a valid job posting type value" }