has_many 直通和多态关系
我不知道这是否可能，但这里是：
FruitBasket
has_many :apples
has_many :bananas
######## What to put here to access Worm through its pest_holder relationship?
Apple
has_many :worms, :as => :pest_holder
belongs_to :fruit_basket
Banana
has_many :worms, :as => :pest_holder
belongs_to :fruit_basket
Worm
belongs_to :pest_holder, :polymorphic => true
我需要能够调用什么关系：
red_delicious = Apple.first
red_delicious.worms.whatever
并让它通过Apple和Banana与Worm的多态关系捕获所有Worm？
看起来有点倒退，但无论如何我都很感谢您的帮助！如果需要任何澄清，尽管询问。
I don't know if this is possible, but here goes:
FruitBasket
has_many :apples
has_many :bananas
######## What to put here to access Worm through its pest_holder relationship?
Apple
has_many :worms, :as => :pest_holder
belongs_to :fruit_basket
Banana
has_many :worms, :as => :pest_holder
belongs_to :fruit_basket
Worm
belongs_to :pest_holder, :polymorphic => true
What is the relationship I need to be able to call:
red_delicious = Apple.first
red_delicious.worms.whatever
And have it grab all of the Worm's through Apple's and Banana's polymorphic relationship with Worm?
It seems kind of backwards, but I appreciate the help anyway! If there's any clarification needed, just ask.
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（猜测我自己上面评论的答案）
你不能做你想做的事，没有 Rails 帮助器允许你从
FruitBasket加入到Worm中单一协会。您可以拥有apple_worms和banana_worms但我确信您已经猜到了，但这不是您想要的。您需要做的是创建自己的方法来获取正确的蠕虫 - 如下所示：
(Guessing the answer to my own comment above)
You can't do what you want to, there's no Rails helper to allow you to join through to
WormfromFruitBasketin a single association. You can haveapple_wormsandbanana_wormsbut I'm sure you guessed that already, and that that's not what you want.What you'll need to do is to create your own method to get to the correct
Worms - something like this: