Setting time attributes using Chronic to parse human text input.

chronic_in_shiftdock.rb

class Shift < ActiveRecord::Base
  validates :starts_at, presence: true
  
  def parsable_start_time
    starts_at.strftime("%-I.%M%P") if starts_at
  end

  def parsable_start_time=(time_string)
    self.starts_at = Chronic.parse(time_string)
  end
end

class ShiftsController < ApplicationController
  
  # ...
  
  def shift_params
    params
      .require(:shift)
      .permit :parsable_start_time #, ...
  end
end