我有 2 个 Mongoid 类:
class Reservation
include Mongoid::Document
belongs_to :listing, class_name: 'Listing', inverse_of: 'Reservation'
end
class Listing
include Mongoid::Document
has_many :reservations, class_name: 'Reservation', foreign_key: :listing_id
end
如果我通过它找到列表_id
,#save!
则不会引发错误
listing = Listing.find(...)
listing.save! #=> true
然后我初始化一个新的预订对象:
reservation = Reservation.find_or_initialize_by(params)
reservation.save! #=> error, exptected though, because I didn't set the listing_id yet
Mongoid::Errors::Validations:
message:
Validation of Reservation failed.
summary:
The following errors were found: Listing can't be blank
resolution:
Try persisting the document with valid data or remove the validations.
from /home/ec2-user/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/bundler/gems/mongoid-71c29a805990/lib/mongoid/persistable.rb:78:in `fail_due_to_validation!'
所以我将较早的列表的 id 分配给预订:
reservation.listing_id = listing._id
reservation.listing_id #=> nil
我什至不能分配listing_id 字段?!
reservation.listing #=> returns the associated document no problem though..
reservation.listing.save! #=> error
Mongoid::Errors::Validations:
message:
Validation of Listing failed.
summary:
The following errors were found: Reservations is invalid
resolution:
Try persisting the document with valid data or remove the validations.
from /home/ec2-user/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/bundler/gems/mongoid-71c29a805990/lib/mongoid/persistable.rb:78:in `fail_due_to_validation!'
无法保存没有有效列表的预订,无法保存没有有效预订的列表
这是什么?!?!
请拯救我的一天...