Error: Route.get() requires a callback function but got a [object Promise]

Question

你们是我最后的希望，我花了12个多小时都没能解决问题

应用程序功能齐全，直到我进行了修改并添加了控件

并将露营地路线移动到单独的文件“controllers”以制作这样的路由器文件

router.get("/", isLoggedIn, CatchAsync(Campgrounds.index));

router.get("/me", isLoggedIn, CatchAsync(Campgrounds.me));

router.get("/new", isLoggedIn, CatchAsync(Campgrounds.new_camp));

router.post("/new/submit", isLoggedIn, validate, CatchAsync(Campgrounds.submitnew));

router.get("/:id", isLoggedIn, CatchAsync(Campgrounds.show_Camp));

router.get("/:id/edit", isLoggedIn, isAuthenticated, CatchAsync(Campgrounds.edit_Camp));

router.delete("/:id/delete", isLoggedIn, isAuthenticated, CatchAsync(Campgrounds.delete_Camp));

之后申请失败运行

Error: Route.get() requires a callback function but got a [object Promise]

这里是沙盒上的项目https://codesandbox.io/s/vigorous-galileo-sdy0w?file=/app.js

Answer 1

那 Error 告诉你一切。我看到了你的沙箱，它显示：

(alias) CatchAsync(fn: any): Promise<(req: any, res: any, next: any) => void>

你的 CatchAsync 函数 returns 一个承诺和 Route.get() 需要回调。

你应该知道 async function 是什么意思。

来自文档：

The word “async” before a function means one simple thing: a function always returns a promise. Other values are wrapped in a resolved promise automatically.

Error: Route.get() requires a callback function but got a [object Promise]

Error: Route.get() requires a callback function but got a [object Promise]

node.js

express

node-modules