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has_one :through on new record doesn't query for associated object

#5854

Given:

class User < AR
  has_one :user_info
  has_many :bank_infos
end
class UserInfo < AR
  belongs_to :user
end
class BankInfo < AR
  belongs_to :user
  has_one :user_info, :through => :user
end

I do:

bank_info = user.bank_infos.build
bank_info.user_info

where user has associated user_info. And I expect bank_info.user_info to equal user.user_info, however it is nil.

Attaching patch...
Any feedback would be appreciated.

Reported by Alexey Ilyichev · October 22nd, 2010 @ 03:12 PM

State: invalid
Milestone: none
Assigned to: nobody
Importance: Low

Activity

  1. Alexey Ilyichev
    Alexey Ilyichev

    Sorry for weird formatting. Code from previous post

    class User < AR
  has_one :user_info
  has_many :bank_infos
end
    

    



    
class UserInfo < AR
  belongs_to :user
end
    

    



    
class BankInfo < AR
  belongs_to :user
  has_one :user_info, :through => :user
end

    October 22nd, 2010 @ 04:24 PM

  2. Jon Leighton
    Jon Leighton
    • State changed from new to invalid
    • Importance changed from to Low

    Hi there,

    Thanks for the bug report. To do this you can use the :inverse_of option on your User.has_many :bank_infos.

    Jon

    December 21st, 2010 @ 07:57 PM

  3. Alexey Ilyichev
    Alexey Ilyichev

    Hi, Jon.

    Thanks for the reply. Inverse_of does not solve anything in this case.

    January 19th, 2011 @ 02:13 PM

  4. Jon Leighton
    Jon Leighton

    Hi,

    You're right, inverse_of is irrelevant here. However I have just tried the test case you provided against latest master and it passes.

    Thanks

    January 23rd, 2011 @ 09:41 PM