Subtract n hours from a DateTime in Ruby

Question

I have a Ruby DateTime which gets filled from a form. Additionally I have n hours from the form as well. I\'d like to subtract those n hours from the previous DateTime. (To

Answer 1

If I'm allowed to use Time instead of DateTime (There are several ways to translate one to another):

# Just remove the number of seconds from the Time object
Time.now - (6 * 60 * 60) # 6 hours ago