批准rails中一个对象的类类型

Question

我有一个关于rails语法的简单问题:

如何找出对象属于哪个类？

我尝试做一些像:

if class(object) == MyClass

谢谢Maechi

Answer 1

你可以做

if object.class == MyClass

要么

if object.is_a?(MyClass)

如果object是子类的实例,后者也返回true MyClass.

Answer 2

object.is_a?(MyClass)
object.kind_of?(MyClass)

Returns true if class is the class of obj, or if class is one of the superclasses of obj or modules included in obj. Aliased as ``

object.instance_of?(MyClass)
object.class == MyClass

Returns true if obj is an instance of the given class.

MyClass === object

Identical to is_a? method. Useful for case statements like

case object
when MyClass
when OtherClass
…
end