Rails attr_readonly 不起作用 [英] Rails attr_readonly doesn't work

问题描述

根据这个问题和文档 attr_readonly 以下应该是可能的:

According to this question and the documentation of attr_readonly the following should be possible:

class MyModel < ActiveRecord::Base
  attr_accessible :foo
  attr_readonly :bar
end

m = MyModel.create(foo: '123', bar: 'bar') # Should work
m.update_attributes(bar: 'baz')            # Should not work

但是第一个失败了，说我不能批量分配bar.我错过了什么?

However the first one fails, saying that I can't mass-assign bar. What am I mising?

推荐答案

来自文档

attr_accessible 获取可访问的属性列表.所有其他属性都将受到保护.

attr_accessible takes a list of attributes that will be accessible. All other attributes will be protected.

所以 attr_accessible 将 bar 属性设置为防止批量赋值.

So attr_accessible made bar attribute as protected from mass-assignment.

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