RubyMoney/money · error · ArgumentError

Money#== supports only zero numerics

Error message

Money#== supports only zero numerics

What it means

Error "Money#== supports only zero numerics" thrown in RubyMoney/money.

Source

Thrown at lib/money/money/arithmetic.rb:87

        return other.is_a?(CoercedNumeric) ? 0 <=> fractional : fractional <=> 0
      end

      # Always allow comparison with zero
      if zero? || other.zero?
        return fractional <=> other.fractional
      end

      other = other.exchange_to(currency)
      fractional <=> other.fractional
    rescue Money::Bank::UnknownRate
      nil
    end

    # Uses Comparable's implementation but raises ArgumentError if non-zero
    # numeric value is given.
    def ==(other)
      if other.is_a?(Numeric) && !other.zero?
        raise ArgumentError, "Money#== supports only zero numerics"
      end

      super
    end

    # Test if the amount is positive. Returns +true+ if the money amount is
    # greater than 0, +false+ otherwise.
    #
    # @return [Boolean]
    #
    # @example
    #   Money.new(1).positive?  #=> true
    #   Money.new(0).positive?  #=> false
    #   Money.new(-1).positive? #=> false
    def positive?
      fractional > 0
    end

View on GitHub (pinned to 26e2829c34)

When it happens

Trigger: Thrown at lib/money/money/arithmetic.rb:87 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of RubyMoney/money@26e2829c34 (2026-08-23). Data as JSON: /api/errors/31c5e16ee81cb0fd. Report an issue: GitHub.