【问题标题】：NextJS routing error, when changing pages, the wrong file is trying to openNextJS 路由错误，换页时，试图打开错误的文件
【发布时间】：2021-09-05 18:44:16
【问题描述】：

我想要什么

我想更改页面而不考虑我正在尝试打开另一个页面。

问题

我遇到了这个奇怪的路由问题。一、我的文件夹结构

pages
  [app]
    [object]
      index.js
    index.js
    manager.js
    feed.js

我在这条路径/[app] 并导航到/[app]/manager，然后我想导航到/[app]/feed，我得到了这个未处理的运行时错误。

TypeError: Cannot read property "title" of undefined

此错误来自[object] index.js。堆栈跟踪如下。当然，它无法读取标题是有道理的，因为我正在尝试打开另一个页面。然而它认为我正在尝试打开[object]。这个错误不时发生，但我尝试打开页面的顺序无关紧要，它可以是经理提供或提供给经理，或者我那里有什么其他东西。我的getStaticPaths 和getStaticProps 在所有这些页面上都是相同的，我将分享manager.js 的一个。

export const getStaticPaths = async () => {
  const paths = appRoutes.map((appRoute) => {
    const slug = appRoute.slug;

    return {
      params: {
        app: slug,
        manager: 'manager',
      },
    };
  });

  return {
    fallback: false,
    paths,
  };
};

export const getStaticProps = async ({ locale }) => {
  return {
    props: {
      ...(await serverSideTranslations(locale, ['manager', 'common'])),
    },
  };
};

同样如此，但[object]：

export const getStaticPaths = async () => {
  const allObjects = await loadObjectData({ id: 'all' });
  const paths = allObjects.flatMap((object) => {
    return appRoutes.map((appRoute) => {
      return {
        params: {
          object: object.type,
          app: appRoute.slug,
        },
      };
    });
  });

  return {
    fallback: false,
    paths,
  };
};

export const getStaticProps = async ({ params, locale }) => {
  const object = await loadObjectData({ type: params.object });
  const app = appRoutes.find((appRoute) => appRoute?.slug === params.app);

  if (!object) {
    throw new Error(
      `${object} is not a valid Object. Try checking out your parameters: ${params.object}`
    );
  }

  if (!app) {
    throw new Error(`${app} is not a valid App.`);
  }

  return {
    props: {
      ...(await serverSideTranslation(locale, ['common'])),
      object,
      app,
    },
  };
};

这个错误很难重现，因为它只是偶尔发生。

新编辑

这是[object]/index.js的完整文件

import appRoutes from '../../../routes/appRoutes';
import loadObjectData from '../../../utils/loadObjects';
import { serverSideTranslation } from 'next-i18next/serverSideTranslations';

export default function ObjectPage({ object }) {
  return <h1> {object.title} </h1>;
}

export const getStaticPaths = async () => {
  const allObjects = await loadObjectData({ id: 'all' });
  const paths = allObjects.flatMap((object) => {
    return appRoutes.map((appRoute) => {
      return {
        params: {
          object: object.type,
          app: appRoute.slug,
        },
      };
    });
  });

  return {
    fallback: false,
    paths,
  };
};

export const getStaticProps = async ({ params, locale }) => {
  const object = await loadObjectData({ type: params.object });
  const app = appRoutes.find((appRoute) => appRoute?.slug === params.app);

  if (!object) {
    throw new Error(
      `${object} is not a valid Object. Try checking out your parameters: ${params.object}`
    );
  }

  if (!app) {
    throw new Error(`${app} is not a valid App.`);
  }

  return {
    props: {
      ...(await serverSideTranslation(locale, ['common'])),
      object,
      app,
    },
  };
};

堆栈跟踪：

ObjectPage: index.js:6 Uncaught TypeError: Cannot read property 'title' of undefined

at ObjectPage (http://localhost:3000/_next/static/chunks/pages/%5Bapp%5D/%5Bobject%5D.js:3733:21)
at div
at Grid (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:13654:35)
at WithStyles (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:179881:31)
at div
at StyledComponent (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:179652:28)
at div
at ProjectSelectionStore (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:234820:77)
at Layout (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:278:23)
at TaskStore (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:235454:77)
at UserDocumentStore (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:235663:77)
at StoneStore (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:235119:77)
at StoreMall (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:409:23)
at ThemeProvider (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:178584:24)
at App (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:234333:24)
at I18nextProvider (http://localhost:3000/_next/static/chunks/pages/_app.js?ts=1624290251377:224427:19)
at AppWithTranslation
at ErrorBoundary (http://localhost:3000/_next/static/chunks/main.js?ts=1624290251377:146:47)
at ReactDevOverlay (http://localhost:3000/_next/static/chunks/main.js?ts=1624290251377:250:23)
at Container (http://localhost:3000/_next/static/chunks/main.js?ts=1624290251377:8662:5)
at AppContainer (http://localhost:3000/_next/static/chunks/main.js?ts=1624290251377:9151:24)
at Root (http://localhost:3000/_next/static/chunks/main.js?ts=1624290251377:9282:24)

25.06.2021

所以我从ObjectPage 和每个NavigationItem 控制台登录路由器。我注意到了一些奇怪的事情。
这是我传递给<Link>的href：

{
  pathname: "/[app]/[menuItem]"
  query: {
    app: "content"
    menuItem: "files"
  }
}

这就是我要回到ObjectPage 的完整路由器。

{
asPath: "/content/editor" // this the path i want to open
back: ƒ ()
basePath: ""
beforePopState: ƒ ()
components: {
  "/[app]/[object]": {styleSheets: Array(0), __N_SSG: true, __N_SSP: undefined, props: {…}, Component: ƒ}
  "/[app]/editor": {initial: true, props: {…}, err: undefined, __N_SSG: true, Component: ƒ, …}
  "/_app": {styleSheets: Array(0), Component: ƒ}
}
defaultLocale: "de"
events: {on: ƒ, off: ƒ, emit: ƒ}
isFallback: false
isLocaleDomain: false
isPreview: false
isReady: true
locale: "de"
locales: ["de"]
pathname: "/[app]/[object]" // [object] is being loaded
prefetch: ƒ ()
push: ƒ ()
query: {app: "content", menuItem: "editor", object: "editor"} // this is interesting
reload: ƒ ()
replace: ƒ ()
route: "/[app]/[object]" // same as pathname
}

在query 中可以看到object 被注入。但我不知道从哪里以及为什么。

【问题讨论】：

title 道具从何而来？您能否向我们展示与此相关的代码（错误的实际来源）？
@juliomalves 我将道具object 传递给页面，然后传递{object.title}。我将在顶部添加代码。
那么您在manager 或feed 页面中没有对title 的引用？
@juliomalves 不，错误消息特别提到它来自[object]/index.js：ObjectPage: index.js:6 Uncaught TypeError: Cannot read property 'title' of undefined。我将添加 Stacktrace
嘿，@juliomalves 我相信我已经解决了。看看我是如何获得参数[menuItem] 的？这是错误的，因为我没有以这种方式命名的动态文件夹或文件。相反，我将其写为pathname: "/[app]/files"，与您的建议非常相似。

标签： next.js getstaticprops getstaticpaths

【解决方案1】：

我有这个代码：

{
  pathname: "/[app]/[menuItem]"
  query: {
    app: "content"
    menuItem: "files"
  }
}

这是不正确的，因为没有到 [menuItem] 的动态路径。所以我写了：

{
  pathname: "/[app]/files"
  query: {
    app: "content"
  }
}

这解决了我遇到的问题。

我误解了文档中的参数。

【讨论】：