質問編集履歴
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改善した後のエラー内容
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@@ -7,6 +7,8 @@
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[GitHub](https://github.com/satorun082/nextjs-blog)
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`lib/posts.js`
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```javascript
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export async function getSortedPostsData() {
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// Get file names under /posts
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@@ -16,14 +18,14 @@
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const files = await response.json()
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const fileNames = files.map(file => file.name)
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const allPostsData = fileNames.map(fileName => {
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const allPostsData = fileNames.map(async (fileName) => {
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// Remove ".md" from file name to get id
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const id = fileName.replace(/.md$/, '')
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// Read markdown file as string
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const repoUrl_tmp = `https://api.github.com/repos/satorun082/article/contents/${id}.md`
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const response_tmp = fetch(repoUrl_tmp)
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const response_tmp = await fetch(repoUrl_tmp)
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const file_tmp = response_tmp.json()
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const file_tmp = await response_tmp.json()
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const fileContents = base64.decode(file_tmp.content)
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// Use gray-matter to parse the post metadata section
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@@ -35,7 +37,6 @@
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...matterResult.data
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}
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})
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-
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// Sort posts by date
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return await allPostsData.sort(({ date: a }, { date: b }) => {
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if (a < b) {
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@@ -49,29 +50,98 @@
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}
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```
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`index.tsx`
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```
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import { GetStaticProps } from 'next'
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import Head from 'next/head'
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import Layout, { siteTitle } from '../components/layout'
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import utilStyles from '../styles/utils.module.css'
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import { getSortedPostsData } from '../lib/posts'
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import Link from 'next/link'
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import Date from '../components/date'
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export const getStaticProps: GetStaticProps = async() => {
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const allPostsData = await getSortedPostsData()
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return {
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props: {
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allPostsData
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}
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}
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}
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type Props = {
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allPostsData: {
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id: string
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title: string
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date: string
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}[]
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}
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export default function Home({ allPostsData }: Props) {
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return (
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<Layout home>
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<Head>
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<title>{siteTitle}</title>
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</Head>
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<section className={utilStyles.headingMd}>
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<p>Im nakadats and Im learning English to make my brondy girl friends</p>
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<p>
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(This is a sample website - you’ll be building a site like this on{' '}
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<a href="https://nextjs.org/learn">our Next.js tutorial</a>.)
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</p>
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</section>
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<section className={`${utilStyles.headingMd} ${utilStyles.padding1px}`}>
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<h2 className={utilStyles.headingLg}>Blog</h2>
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<ul className={utilStyles.list}>
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{allPostsData.map(({ id, date, title }) => (
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<li className={utilStyles.listItem} key={id}>
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<Link href={`/${id}`}>
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<a>{title}</a>
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</Link>
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<br />
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<small className={utilStyles.lightText}>
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<Date dateString={date} />
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</small>
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</li>
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))}
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</ul>
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</section>
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</Layout>
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)
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}
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```
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# エラー内容
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```
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```error
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Server Error
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Error: Error serializing `.allPostsData[0]` returned from `getStaticProps` in "/".
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Reason: `object` ("[object Promise]") cannot be serialized as JSON. Please only return JSON serializable data types.
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This error happened while generating the page. Any console logs will be displayed in the terminal window.
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Source
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.next/server/pages/index.js (26:34) @ <unknown>
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> 26 | const file_tmp = response_tmp.json()
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Call Stack
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isSerializable
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (64:15)
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<unknown>
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (56:24)
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Array.every
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<anonymous>
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isSerializable
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (54:23)
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<unknown>
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (46:66)
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Array.every
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<anonymous>
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isSerializable
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (43:39)
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Object.isSerializableProps
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/lib/is-serializable-props.js (66:12)
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Object.renderToHTML
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file:///mnt/c/Users/minolab/Desktop/nextjs-blog/node_modules/next/dist/server/render.js (430:97)
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runMicrotasks
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<anonymous>
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```
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# 参考サイト
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1
題目の変更
title
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@@ -1,1 +1,1 @@
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1
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Next.jsにおける
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1
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Next.jsにおける外部APIの使用
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body
CHANGED
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File without changes
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