activerecord/lib/active_record/type/numeric.rb


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module ActiveRecord
  module Type
    module Numeric # :nodoc:
      def number?
        true
      end

      def type_cast_for_write(value)
        case value
        when true then 1
        when false then 0
        when ::String then value.presence
        else super
        end
      end
    end
  end
end