Ruby on Rails Monday, April 30, 2018

I've been putting options for select lists in my models but I haven't been able to do this with option/value pairs Anyone know how? The code below doesn't work

  DURATION_TYPES =  [['7 days', '7' ],['14 days', '14'], ['21 days','21'], ['30 days','30']]
  validates :duration, inclusion: { in: DURATION_TYPES }

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