正在尝试导入JSON文件，以便在程序运行后立即发布到API上

Question

我正在构建一个外卖网络应用程序，其中我需要在我的服务器上的一些项目。我想在服务器一运行就将所有这些JSON数据导入到服务器上。然后使用axios获取它并在我的购物车组件中更新它。多么。我是否要导入JSON文件并确保所有项都放入我自己的API中

JSON文件：

[
{
    "id": 1,
    "name": "small burger",
    "price": 3.00
},
{
    "id": 2,
    "name": "medium burger",
    "price": 4.20

},
{
    "id": 3,
    "name": "large burger",
    "price": 5.00
},
{
    "id": 4,
    "name":"medium drink",
    "price": 1.50
},
{
    "id": 5,
    "name":"large drink",
    "price": 2.00
},
{
    "id": 6,
    "name":"xl drink",
    "price": 2.50
},
{
    "id": 7,
    "name":"small fries",
    "price": 2.00
},
{
    "id": 8,
    "name":"medium fries",
    "price": 3.00
},
{
    "id": 9,
    "name":"large fries",
    "price": 4.00
}

]

服务器/INDEX.JS

const app = express()
const bc = require('./controllers/foodCtrl')

const port = 4000

app.use(express.json())

app.get('/api/foods', bc.read)
app.post('/api/foods-in-cart', bc.create)
app.put('/api/foods-in-cart/:id', bc.update)
app.delete('/api/foods-in-cart/:id', bc.delete)

app.listen(port, () => console.log('Server running on ' + port))






SERVER/CONTROLLERS/foodCtrl.js

    // import * as foods from '.../food.json'
const food = []
let id = 1

module.exports = {

    read: (req, res) => {
        res.status(200).send(food)
    },
    
    create: (req, res) => {

        food.push(
            {
                id: id,
                name: req.body.name,
                price: req.body.price
            }
        )
        id++
        res.status(200).send(food)
    },

    update: (req, res) => {
        const {id} = req.params
        let foodIndex = 0
        food.map((element, index) => {
            if(element.id === +id){
                foodIndex = index
            }
        })
        let updateName = {
            id: +id,
            name: req.body.name,
            price: req.body.price
        }
        food.splice(foodIndex, 1, updateName)
        res.status(200).send(food)
    },
    delete: (req, res) => {
        const {id} = req.params
        let index2 = 0

        food.map((element, i) => {
            if(element.id === +id){
                index2 = i
            }
        })

        food.splice(index2, 1)
        res.status(200).send(food)
    }



}

Answer 1

这非常简单，您只需在SERVER/CONTROLLERS/foodCtrl.js上添加const food = require('./food.json');即可。

JSON将被加载并解析为Javascript对象，您可以通过food访问它

你可能会问，为什么我们可以直接导入JSON文件？这是因为node提供了开箱即用的功能。

你可以在https://nodejs.org/api/modules.html#modules_all_together上阅读更多