Question

我是Next.js的新手，并且很难使帖子ID从索引页面传递到帖子页面getInitialProps（）函数。正在使用链接组件请求页面。

最终目标是将帖子ID放入post.js的getInitialProps函数中，以便像以下这样请求正确的json文件：

https://www.example.com/menu/100.json <-id = 100

JSON API端点都可以从浏览器正常工作，并且索引页面在nextjs中正常工作。

到目前为止，我已经尝试了一些打印语句来查找传递此Link href属性的位置，但是我仍无法访问href中的“ itemid”。

有3个主要文件可以重现此内容：

index.js


import Layout from '../components/MyLayout.js'
import Link from 'next/link'
import fetch from 'isomorphic-unfetch'

const Index = (props) => (
  <Layout>
    <h1>Pages</h1>
    <ul>
{props.results.map(result => (
        <li key={result.id}>
          <Link as={`/${result.slug}`} href={`/post?itemid=${result.id}`}>
            <a>{result.title}</a>
          </Link>
        </li>
      ))}
    </ul>
  </Layout>
)

Index.getInitialProps = async function() {
  const res = await fetch('https://www.example.com/menu.json')
  const data = await res.json()

  return {
    results: data['data'].map(data => data)
  }
}

export default Index

server.js


const express = require('express')
const next = require('next')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app
  .prepare()
  .then(() => {
    const server = express()

    server.get('/:id*', (req, res) => {
      const actualPage = '/post'
      const queryParams = { slug: req.params.id + req.params[0]}
      app.render(req, res, actualPage, queryParams)
    })


    server.get('*', (req, res) => {
      return handle(req, res)
    })

    server.listen(3000, err => {
      if (err) throw err
      console.log('> Ready on http://localhost:3000')
    })
  })
  .catch(ex => {
    console.error(ex.stack)
    process.exit(1)
  })

post.js


import { withRouter } from 'next/router'
import Layout from '../components/MyLayout.js'
import fetch from 'isomorphic-unfetch'

const Post = props => (
  <Layout>
    <h1>{props.result.title}</h1>
    <p>{props.result.bodyCopy.replace(/<[/]?p>/g, '')}</p>
    <img src={props.result.image} />
  </Layout>
)

Post.getInitialProps = async function(context) {
  const { itemid } = context.query

  const res = await fetch(`https://www.example.com/menu/${itemid}.json`)
  const result = await res.json()

  return { result }
}

export default withRouter(Post)

这就是我想发生的事情：

用户请求：https://www.example.com/some-page “某些页面”的帖子ID为100

服务器在请求/刷新的页面上同时显示“ some-page”和“ 100”。

服务器对以下对象进行API调用：https://www.example.com/menu/100.json

到目前为止，我得到的最好结果是将API网址设置为：

https://www.example.com/menu/some-page.json

此端点无效，因为ID并未请求该端点。

Answer 1

请尝试此操作是否按预期工作？

Index.js

import Layout from '../components/MyLayout.js'
import Link from 'next/link'
import fetch from 'isomorphic-unfetch'

const Index = (props) => (
  <Layout>
    <h1>Pages</h1>
    <ul>
{props.results.map(result => (
        <li key={result.id}>
          <Link as={`/${result.slug}/${result.id}`} href={`/post?itemid=${result.id}`}>
            <a>{result.title}</a>
          </Link>
        </li>
      ))}
    </ul>
  </Layout>
)

Index.getInitialProps = async function() {
  const res = await fetch('https://www.example.com/menu.json')
  const data = await res.json()

  return {
    results: data['data'].map(data => data)
  }
}

export default Index

Server.js

const express = require('express')
const next = require('next')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app
  .prepare()
  .then(() => {
    const server = express()

    server.get('/:slug/:id*', (req, res) => {
      const actualPage = '/post'
      const queryParams = { slug: req.params.slug, itemid: req.params.id }
      app.render(req, res, actualPage, queryParams)
    })


    server.get('*', (req, res) => {
      return handle(req, res)
    })

    server.listen(3000, err => {
      if (err) throw err
      console.log('> Ready on http://localhost:3000')
    })
  })
  .catch(ex => {
    console.error(ex.stack)
    process.exit(1)
  })

Post.js

import { withRouter } from 'next/router'
import Layout from '../components/MyLayout.js'
import fetch from 'isomorphic-unfetch'

const Post = props => (
  <Layout>
    <h1>{props.result.title}</h1>
    <p>{props.result.bodyCopy.replace(/<[/]?p>/g, '')}</p>
    <img src={props.result.image} />
  </Layout>
)

Post.getInitialProps = async function(context) {
  const { itemid } = context.query

  const res = await fetch(`https://www.example.com/menu/${itemid}.json`)
  const result = await res.json()

  return { result }
}

export default withRouter(Post)

如何将发布商品ID传递到getInitialProps？

1 个答案: