我正在使用express作为next.js的自定义服务器。当我单击产品到产品列表时,一切都很好
步骤1:我点击产品链接
步骤2:它将在数据库中显示产品。
但是,如果刷新/products
页面,则会出现此错误
服务器代码(查看/products
端点)
app.prepare()
.then(() => {
const server = express()
// This is the endpoints for products
server.get('/api/products', (req, res, next) => {
// Im using Mongoose to return the data from the database
Product.find({}, (err, products) => {
res.send(products)
})
})
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)
})
页面-products.js(简单的布局,将循环产品json数据)
import Layout from '../components/MyLayout.js'
import Link from 'next/link'
import fetch from 'isomorphic-unfetch'
const Products = (props) => (
<Layout>
<h1>List of Products</h1>
<ul>
{ props.products.map((product) => (
<li key={product._id}>{ product.title }</li>
))}
</ul>
</Layout>
)
Products.getInitialProps = async function() {
const res = await fetch('/api/products')
const data = await res.json()
console.log(data)
console.log(`Showed data fetched. Count ${data.length}`)
return {
products: data
}
}
export default Products