英文:
Golang - Why this error happened in ServeHTTP Function : reflect: call of reflect.Value.Call on zero Value
问题
这是我的代码和错误信息：https://gist.github.com/WithGJR/a700e5d5bd35b5c8eef2
有人可以解释一下为什么会出现这个错误，以及如何修复吗？谢谢。
英文:
My code and error message are in here: https://gist.github.com/WithGJR/a700e5d5bd35b5c8eef2
Could anyone explain for me why this error occured and how to fix it? Thanks.
答案1
得分: 0
因为value.MethodByName(info.controllerMethodName)可能返回一个无效的方法，所以你应该检查method.IsValid()。
当出现这种情况时，你可以开始添加一堆log.Println来查看发生了什么，直到引入一个合适的调试器为止。
//编辑
router.Get("/", controllers.IndexController{}, "Index")
你正在传递一个值，func (this *IndexController) Index()是在指针上定义的，所以你的MethodByName不起作用，将你的router.Get更改为：
router.Get("/", &controllers.IndexController{}, "Index")
英文:
Because value.MethodByName(info.controllerMethodName) probably returns an invalid method, you should check method.IsValid().
When something like this happens you start adding a bunch of log.Printlns to see what's happening, well until a proper debugger is introduced.
//edit
router.Get("/", controllers.IndexController{}, "Index")
You're passing a value, func (this *IndexController) Index() is defined on the pointer so your MethodByName isn't working right, change your router.Get to :
router.Get("/", &controllers.IndexController{}, "Index")
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