动态获取Object的属性 [英] Dynamically get Object's attribute

问题描述

如何动态获取 activerecord 对象的属性值?

How do I dynamiclly get an attribute value for an activerecord object?

例如我有一个名为 attr_name 的变量.
我想做这样的事情:

for example I have a variable named attr_name.
I want to do something like this:

person = Person.find(1)
attr_name = "address"
address = person.<function_name>(attr_name)

可以使用哪个function_name?

推荐答案

要么使用 person.attributes[attr_name] 或 person.read_attribute(att_name)，甚至更短那么这是person[attr_name].

Either use person.attributes[attr_name] or person.read_attribute(att_name), or even shorter then this is person[attr_name].

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