How can I store time-of-day in MongoDB? As a string? Give arbitrary year/month/day?

Question

e.g. \"23:55:00\"

I\'m in the process of converting a bus schedule database from Postgres to Mongo.
Postgres has a time without timezone datatype th

Answer 1

You could store the time as a number (number of seconds since 00:00:00). It will be naturally sorted and easy to convert from/to hh:mm:ss format when needed.

//from 23:55:00 to the stored time
storedTime = hours * 3600 + minutes * 60 + seconds

//from the stored time to 23:55:00
hours = storedTime / 3600  // needs to be an integer division
leaves = storedTime - hours * 3600
minutes = leaves / 60
seconds = leaves - 60 * minutes