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:inverse_of does not apply to association extensions
Reported by Chowlett | November 11th, 2010 @ 12:32 PM
(Note: this is almost a direct crosspost of this StackOverflow question.)
If you create a :has_many relationship with
:inverse_of, and define an extension on the
association to return a subset of the associated objects, then
objects returned by the extension method don't benefit from the
:inverse_of declaration.
For example:
class Player < ActiveRecord::Base
has_many :cards, :inverse_of => :player do
def in_hand
find_all_by_location('hand')
end
end
end
class Card < ActiveRecord::Base
belongs_to :player, :inverse_of => :cards
end
# Player#cards benefits from :inverse_of as follows:
p = Player.find(:first)
c = p.cards[0]
p.score # => 2
c.player.score # => 2
p.score += 1
c.player.score # => 3
c.player.score += 2
p.score # => 5
# ... but Player#cards.in_hand doesn't:
p = Player.find(:first)
c = p.cards.in_hand[0]
p.score # => 2
c.player.score # => 2
p.score += 1
c.player.score # => 2
c.player.score += 2
p.score # => 3
d = p.cards.in_hand[1]
d.player.score # => 2
Comments and changes to this ticket
-
Neeraj Singh November 12th, 2010 @ 11:57 AM
- Importance changed from “” to “Low”
Which version of rails you are using?
-
Chowlett November 12th, 2010 @ 12:25 PM
>rails --version
Rails 3.0.0(This is my first Lighthouse ticket, so if I've missed out useful information please do ask for it!)
-
Santiago Pastorino February 12th, 2011 @ 07:18 PM
- State changed from “new” 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 12th, 2011 @ 07:18 PM
- State changed from “open” to “stale”
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2kan
Chowlett
Jeremy Kemper
Neeraj Singh