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active record associations
Reported by Daniel | November 7th, 2008 @ 04:20 AM | in 3.x
What's wrong with ruby associations?
Somehow association fields don't have any support for dirty objects nor optimistic locking.
I would expect dirty objects to work like this:
class Person has_many :cars end
person = Person.find_by_name("Jack") person.cars
=> [#]
person.cars=[Car.find_by_name("Porsche"), Car.find_by_name("VW")] person.cars
=> [#, #]
person.changed? => true person.changes
=> {"cars"=>[[#], [#, #]]}
person.save #associations are saved in the database
However ror returns the following
person = Person.find_by_name("Jack") person.cars
=> [#]
person.cars=[Car.find_by_name("Porsche"), Car.find_by_name("VW")] #associations are saved in the database person.cars
=> [#, #]
person.changed? => false person.changes
=> {}
The same problem happens with optimistic locking
p1 = Person.find_by_name("Jack") p2 = Person.find_by_name("Jack")
p1.cars = [Car.find_by_name("Porsche")] p1.save
p2.cars = [Car.find_by_name("BMW")] p2.save
I would expect the object to raise an exception, but it doesn't.
Isn't there a way to unify the behaviour of regular fields and associations? Most objects in my app don't represent flat tables, but tables that associate each other. Right now I'm forced to having to wrap many attribute updates into a transaction and write my own object comparisons.
Comments and changes to this ticket
-
Pratik March 12th, 2009 @ 04:00 PM
- State changed from “new” to “incomplete”
Can we please have a patch with failing tests ? http://guides.rails.info/contrib... should be helpful.
Thanks !
-
-
Santiago Pastorino February 2nd, 2011 @ 04:51 PM
- State changed from “incomplete” to “open”
This issue has been automatically marked as stale because it has not been commented on for at least three months.
The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.
Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.
-
Santiago Pastorino February 2nd, 2011 @ 04:51 PM
- State changed from “open” to “stale”
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Daniel
Pratik