How to save dates in local timezone to db with rails3?

Question

I have Rails3 application with model user and field expires_at created like this:

t.column :expires_at, :timestamp

In my database (postgres

Answer 1

For saving time in local timezone to database this has to be set in application.rb

 config.active_record.default_timezone = :local

Answer 2

If you only want to use local times on certain columns, rather than as a global setting, then the Rails documentation tells us this:

# If your attributes are time zone aware and you desire to skip time zone conversion to the current Time#zone when reading certain attributes then you can do following:

class Topic < ActiveRecord::Base
  self.skip_time_zone_conversion_for_attributes = [:written_on]
end

(This also skips time zone conversion on writing, not just reading). And you can pass in an array of symbols for multiple attributes.

I am not sure which versions of Rails this was introduced in, though.