How to store UTC time values in Mongo with Mongoid?

Posted by Jerry Cheung on Stack Overflow See other posts from Stack Overflow or by Jerry Cheung
Published on 2010-05-18T00:45:18Z Indexed on 2010/05/18 0:50 UTC
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mongoid

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mongo

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ruby-on-rails

The behavior I'm observing with the Mongoid adapter is that it'll save 'time' fields with the current system timezone into the database. Note that it's the system time and not Rail's environment's Time.zone. If I change the system timezone, then subsequent saves will pick up the current system timezone.

# system currently at UTC -7
@record.time_attribute = Time.now.utc
@record.save

# in mongo, the value is "time_attribute" : "Mon May 17 2010 12:00:00 GMT-0700 (QYZST)"
@record.reload.time_attribute.utc?  # false

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