The magic is actually quite simple: Rails uses reflection to copy controller variables into a collection, which is then copied back into the view instance.

这一机制背后的原理其实很简单：Rails首先通过反射将控制器中的变量拷贝到一个容器中，其后又将该容器中的变量拷贝回视图实例。

youdao

The magic is actually quite simple: Rails uses reflection to copy controller variables into a collection, which is then copied back into the view instance.

这一机制背后的原理其实很简单：Rails首先通过反射将控制器中的变量拷贝到一个容器中，其后又将该容器中的变量拷贝回视图实例。

youdao