Rails has_many 通过单一关联
这可能很简单，但我还没有能够解决这个问题。
我有 3 个表...（远不止这个），但在这种情况下 3 个表很重要。
地点 预订和 评级
Places has_many bookings
每个预订都有一个评级（因为用户只评级一次）并且属于（a）地点
评级属于（a）预订
所以即使预订只有一个评级，通过预订也可以通过预订进行 has_many 评级，因为地方也有很多预订，
但这似乎不起作用？其余的似乎都这样。
Bookings 具有 place_id，Ratings 具有 booking_id，并且我通过关联成功地与所有其他 has_many 合作...只是 has_one 没有？有什么想法吗？谢谢
补充：如果我将 Bookings 更改为 has_many : ratings ，它会起作用...但 Bookings 每次预订只会有一个评级...所以这似乎不是一件好事。
Invalid source reflection macro :has_one for has_many :ratings, :through => :bookings. Use :source to specify the source reflection.
This is probably quite simple but I haven't yet been able to wrap my head around the problem.
I have 3 tables... (well more than that) but in this scenario 3 that matter.
Places
Bookings and
Ratings
Places has_many bookings
Each booking has_one rating (because the user only rates once) and belongs_to (a) Place
Ratings belong_to (a) Booking
So even though bookings has only one rating, places has_many ratings through bookings as places has many bookings also
but this doesn't seem to work? All the rest seem to.
Bookings has place_id and Ratings has a booking_id, and I've been successful with all other has_many through associations... just not the has_one? Any ideas? Thanks
addition: if i change Bookings to has_many :ratings it works... but bookings will only ever have one rating per booking... so this doesn't seem like a good thing.
Invalid source reflection macro :has_one for has_many :ratings, :through => :bookings. Use :source to specify the source reflection.
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has_many :through不适用于连接模型上的has_one关系；有关详细信息，请参阅以下 Rails 票证：如果可能，最好的解决方案可能是修改您的关系，以便预订
belongs_to评级而不是has_one评级。has_many :throughdoesn't work withhas_onerelations on the join model; see the following Rails tickets for details:If possible, the best solution is probably to modify your relations so that a Booking
belongs_toa Rating rather thanhas_oneRating.