Checking if date is over a day old, over a year old etc?

What would the best way be to check if a date is more than a day old, or a year old et开发者_JS百科c?

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See this question: comparision of date in ruby The compare to a value like

1.day.ago
1.month.ago
1.year.ago

Using these produces the following output:

Loading development environment (Rails 3.0.7)
ruby-1.9.2-p180 :001 > 1.year.ago
 => Thu, 27 May 2010 17:45:25 UTC +00:00 
ruby-1.9.2-p180 :002 > 1.month.ago
 => Wed, 27 Apr 2011 17:45:32 UTC +00:00 
ruby-1.9.2-p180 :003 > 1.day.ago
 => Thu, 26 May 2011 17:45:36 UTC +00:00 
ruby-1.9.2-p180 :004 > 

and see if that works.

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Use ActiveSupport helpers

@date < 1.day.ago

@some_other_date < 2.years.ago

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if the_date < 1.day.ago or the_date < 1.year.ago

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Try:

a_date > 1.day.ago
a_date > 1.year.ago

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Rails 6 now has more idiomatic Time comparitors that you can use:

date.before?(1.day.ago)
date.after?(1.week.ago)

Which I think is much nicer that the standard comparison operators.

As Jan Klimo mentions in a comment above, you'd naturally read last_login > 1.month.ago as "last_login is more than 1 day ago", which is the exact opposite of what it means.

before? and after? allows you to avoid that extra mental hop when parsing it.