Stale data in Identity Map causes data to be destroyed.

[rubys]

All information needed to reproduce this can be found in http://intertwingly.net/stories/2011/05/09/

    depot.tgz - complete Rails 3.1 application after the point of failure
    development.log - Rails server log after the point of failure
    relation-30.html - complete scenario run successfully on Rails 3.0
    relation-31.html - same scenario with failure on Rails 3.1
    relation.rb - script used to produce the results

Note that a LineItem is created initially with an cart_id. Later that cart_id is set to nil and that record is saved to disk. After that point, a Cart.Destroy deletes that LineItem.

Key parts of the development log:

      ESC[1mESC[35mCart LoadedESC[0m  ESC[1mFrom Identity Map (id: 1)ESC[0m
      ESC[1mESC[35mSQL (0.3ms)ESC[0m  DELETE FROM "line_items" WHERE "line_items"."id" = ?  [["id", 1]]     

[josevalim]

@rubys I am closing this one, Identity Map will be off on Rails 3.1 and we will detail a roadmap to handle all association related issues.

[petervandenabeele]

Any news on this roadmap to handle association issues? Thanks.