daterange_extensions.cr

struct Daterange
  def self.adapter
    Lucky
  end

  module Lucky
    alias ColumnType = UInt8
    include Avram::Type

    def parse(value : UInt8)
      SuccessfulCast(UInt8).new(value)
    end

    def parse(values : Array(UInt8))
      SuccessfulCast(Array(UInt8)).new values
    end

    def parse(value : String)
      SuccessfulCast(UInt8).new(UInt8.new(value))
    end

    def parse(values : Array(String))
      SuccessfulCast(Array(UInt8)).new values
    end

    def to_db(value : UInt8)
      value.to_s
    end

    class Criteria(T, V) < Avram::Criteria(T, V)
    end
  end
end

Instead of SuccessfulCast(UInt8).new(UInt8.new(value))
I could also write the line like this SuccessfulCast(UInt8).new value.to_u8