Rails ActiveRecord: lock without reload

问题

Can I lock an ActiveRecord object without reloading it?

user = User.find(1)
=> #<User id: 1, name: "Ed" ...>
user.name = "Joe"
=> "Joe"
user.lock!
=> #<User id: 1, name: "Ed" ...>

I could send a raw SQL "SELECT ... FOR UPDATE", but it doesn't seem too clean.

回答1:

I ended up adding a method to ActiveRecord::Base:

ActiveRecord::Base.class_eval do
  def lock_without_reload!
    self.class.lock(true).find(id)
    true
  end
end

来源：https://stackoverflow.com/questions/38211871/rails-activerecord-lock-without-reload