Ruby China

Rails user.update_attribute (:pwd, pwd) 的拆分？

egg_show · May 28, 2014 · Last by yiming replied at May 28, 2014 · 2426 hits

user.update_attribute(:pwd, pwd) 是这样理解吗： user.pwd = pwd 更新到对象 user.update 更行到数据库 这样两步吗？ 而不是直接将 pwd 更新到数据库

miclle #1 May 28, 2014

数据库里应该没有一个 pwd 字段吧，应该是一个虚拟属性

https://ruby-china.org/topics/2163

billy #2 May 28, 2014 
def update(attributes)
  # The following transaction covers any possible database side-effects of the
  # attributes assignment. For example, setting the IDs of a child collection.
  with_transaction_returning_status do
    assign_attributes(attributes)
    save
  end
end

Yes, two steps. The last step is save.

1 likes
egg_show #3 May 28, 2014

#1 楼 @miclle 就是看到了虚拟属性，所以想到更新应该是两步？

zj0713001 #4 May 28, 2014

update_attribute 不会触发 validations 尽量不要用～

egg_show #5 May 28, 2014

#4 楼 @zj0713001 那用什么，update_attributes?

zj0713001 #6 May 28, 2014

#5 楼 @egg_show 是的 或者这样写

model.attributes = {}
model.save  # or model.save!
1 likes
7 Floor has deleted
egg_show #8 May 28, 2014

#6 楼 @zj0713001 怎么在 model 里面用 lib 里面定义的 util 呢 - -

zj0713001 #9 May 28, 2014

#8 楼 @egg_show 可以直接用 config 里 autoload_paths 加上 lib 路径就行了

yiming #11 May 28, 2014

https://github.com/rails/rails/pull/6738#issuecomment-39584005

根据这个 PR，update_attribute 一度还被移除过。。。

You need to Sign in before reply, if you don't have an account, please Sign up first.