Abr*_*m P 12 ruby validation associations ruby-on-rails-3 rails-activerecord
我有以下两种(消毒/程式化)模型:
class DrivingExam < ActiveRecord::Base
belongs_to :dmv_rules
has_many :invigilator_assignments, as: :assignable
has_many :invigilator, through: :invigilator_assignments
validate do |record|
record.invigilator_assignments.each do |i|
next if i.valid?
i.errors.full_messages.each do |msg|
errors.add_to_base(msg)
end
end
end
end
class InvigilatorAssignment < ActiveRecord::Base
attr_accessible :invigilator_id
belongs_to :assignable, polymorphic: true
belongs_to :invigilator
validates :invigilator_id, presence: true
validates_each :invigilator do |record, attr, value|
if record.assignable.is_a?(DrivingExam) && !value.no_scheduling_conflicts?
record.errors.add attr, "This Invigilator has a scheduling conflict"
end
end
end
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DrivingExamController通过以下方式调用这些:
if @driving_exam.save
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预期的行为是模型应该在验证时返回false并将子消息加入父错误哈希并将其传递给控制器.
相反的是,页面无法使用422(这很奇怪)保存(这很好)并且不传递消息.
通过puts在上面的代码中添加语句,我已经确定:
1)if条件validates_each成功,record.errors因此数组在InvigilatorAssignment模型内部设置.
2)在validate do循环中,监考人员的分配是有效的,没有错误
3)validate do环中之前运行validates_each环
所以问题是:我如何确保DrivingExam验证InvigilatorAssignment并将其错误消息合并到自己的错误哈希中.
请参考 stackoverflow 上的这个问题:
Ruby on Rails:如何从显示的子资源获取错误消息?
它与你想要的类似。