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Asked: 2026-05-11T08:51:12+00:00

I’ve got code that does time tracking for employees. It creates a counter to

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I’ve got code that does time tracking for employees. It creates a counter to show the employee how long they have been clocked in for.

This is the current code:

  start_time = Time.parse(self.settings.first_clock_in)   total_seconds = Time.now - start_time   hours = (total_seconds/ 3600).to_i   minutes = ((total_seconds % 3600) / 60).to_i   seconds = ((total_seconds % 3600) % 60).to_i

This works fine. But because Time is limited to the range of 1970 – 2038 we are trying to replace all Time uses with DateTimes. I can’t figure out how to get the number of seconds between two DateTimes. Subtracting them yields a Rational which I don’t know how to interpret, whereas subtracting Times yields the difference in seconds.

NOTE: Since Ruby 1.9.2, the hard limit of Time is removed. However, Time is optimized for values between 1823-11-12 and 2116-02-20.

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1 Answer

  1. Subtracting two DateTimes returns the elapsed time in days, so you could just do:

    elapsed_seconds = ((end_time - start_time) * 24 * 60 * 60).to_i
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