Ruby-on-rails 在 Rails 中保存 ActiveRecord 模型后如何获取 id 值
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How to get id values after saving an ActiveRecord model in rails
提问by sameera207
I have an ActiveRecord model (I'm on rails 2.3.8) called user and I'm saving it as
我有一个名为 user 的 ActiveRecord 模型（我在 Rails 2.3.8 上），我将它保存为
user = User.new
user.name = "user name"
user.save!
what I want to do is get the generated user id after creating the user. But currently it returns true/ false value upon saving
我想要做的是在创建用户后获取生成的用户 ID。但目前它在保存时返回真/假值
How can I get the saved user id?
如何获取已保存的用户 ID？
回答by Chowlett
Just call user.idafter you've saved.
user.id保存后调用即可。
回答by Ravistm
For people who looking for on createin model, below is the way:
对于在模型中创建的人，以下是方法：
class User < ActiveRecord::Base
...
after_create :do_something
def self.do_something
user_id = id #this will have last created id
# use this according to your needs
end
...
end
回答by jsamm
the way I did it was
我这样做的方式是
class User < ActiveRecord::Base
...
id = nil
after_save {id = self.id}
...
end
and then the local variable id is available throughout the model
然后局部变量 id 在整个模型中可用
