Changing Date::DATE_FORMATS[:default] breaks (de-)serialization of attributes in models

[nasa42]

class Post
  serialize :many_dates, Array
end

Now in rails console

> Post.create!(:many_dates => [Date.today, Date.tomorrow])
> Post.last.many_dates
=> [Tue, 07 Feb 2012, Wed, 08 Feb 2012]
> Date::DATE_FORMATS[:default] = "%d-%b-%Y"
> Post.create!(:many_dates => [Date.today, Date.tomorrow])
> Post.last.many_dates
=> "--- \n- !timestamp 07-Feb-2012\n- !timestamp 08-Feb-2012\n"

Output of Post.last.many_dates, sometimes it returns String (like above) and sometimes raises ActiveRecord::SerializationTypeMismatch

Tested with Rails 3.1.1, 3.1.3 and 3.2.1 on ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

This issue was also reported in June 2008 at https://rails.lighthouseapp.com/projects/8994/tickets/340-yaml-activerecord-serialize-and-date-formats-problem

[isaacsanders]

Is this still and issue?

[dima4p]

$ r c
Loading development environment (Rails 3.2.3)
1.9.3p0 :001 > s = Setting.find_by_code 'min_passport_date'
  Setting Load (1.4ms)  SELECT "settings".* FROM "settings" WHERE "settings"."code" = 'min_passport_date' LIMIT 1
 => #<Setting id: 12, code: "min_passport_date", value: "26.12.1993", created_at: "2012-04-18 19:21:46", updated_at: "2012-05-14 07:13:33"> 
1.9.3p0 :002 > s.value = Date.parse('26.12.1993')
 => Sun, 26 Dec 1993 
1.9.3p0 :003 > s.value.class
 => Date 
1.9.3p0 :004 > s.save
   (0.5ms)  BEGIN
  Setting Exists (0.9ms)  SELECT 1 FROM "settings" WHERE ("settings"."code" = 'min_passport_date' AND "settings"."id" != 12) LIMIT 1
   (26.7ms)  UPDATE "settings" SET "value" = '--- 26.12.1993
...
', "updated_at" = '2012-05-14 07:26:51.862271' WHERE "settings"."id" = 12
   (6.5ms)  COMMIT
 => true 
1.9.3p0 :005 > s.value.class
 => String 
1.9.3p0 :006 > s.value
 => "26.12.1993" 

[frodsan]

Tested with master: works fine!

>> Post.create! many_dates: [Date.today, Date.tomorrow]
=> #<Post id: 1, many_dates: [Tue, 03 Jul 2012, Thu, 05 Jul 2012], created_at: "2012-07-04 03:37:03", updated_at: "2012-07-04 03:37:03">

>> Post.last.many_dates
=> [Tue, 03 Jul 2012, Thu, 05 Jul 2012]

>> Date::DATE_FORMATS[:default] = "%d-%b-%Y"
=> "%d-%b-%Y"

>> Post.create!(:many_dates => [Date.today, Date.tomorrow])
=> #<Post id: 2, many_dates: ["03-Jul-2012", "05-Jul-2012"], created_at: "2012-07-04 03:37:25", updated_at: "2012-07-04 03:37:25">

>> Post.last.many_dates
=> ["03-Jul-2012", "05-Jul-2012"]

[frodsan]

Tested with 3-2-stable: Also works fine!

Loading development environment (Rails 3.2.6)

>> Post.create! many_dates: [Date.today, Date.tomorrow]
=> #<Post id: 2, many_dates: [Tue, 03 Jul 2012, Thu, 05 Jul 2012], created_at: "2012-07-04 03:43:54", updated_at: "2012-07-04 03:43:54">

>> Post.last.many_dates
=> [Tue, 03 Jul 2012, Thu, 05 Jul 2012]

>> Date::DATE_FORMATS[:default] = "%d-%b-%Y"
=> "%d-%b-%Y"

>> Post.create!(:many_dates => [Date.today, Date.tomorrow])
=> #<Post id: 3, many_dates: ["03-Jul-2012", "05-Jul-2012"], created_at: "2012-07-04 03:44:08", updated_at: "2012-07-04 03:44:08">

>> Post.last.many_dates
=> ["03-Jul-2012", "05-Jul-2012"]

@carlosantoniodasilva @rafaelfranca hey guys, i think you can close it :)

[rafaelfranca]

@frodsan Thanks.