未触发ActiveRecord after_rollback回调

Question

由于升级到Rails 6，我无法启动after_rollback回调。我已经验证了这在Rails6.0.3.6或6.1.3.1上不起作用。感谢您的帮助！

class User < ActiveRecord::Base
after_rollback do |user|
puts "You have rolled back!"
end
validates_presence_of :name
end

> User.first.update!(name: nil)
ActiveRecord::RecordInvalid (Validation failed: Name cant be blank)
> User.create!
ActiveRecord::RecordInvalid (Validation failed: Name cant be blank)

根据文档，after_rollback应在创建、更新或销毁被回滚后触发

Answer 1

只有在成功验证要保存的实体后，才会打开默认的DB事务，除非手动打开它们。尝试

User.transaction do
User.first.update!(name: nil)
end