我正在构建一个 MEVN 堆栈 CRUD 应用程序(Vue、Node、Express、MongoDB)。我正在尝试为我的应用程序设置以下 Express 路线...
postRoutes.get('/view/:id', async (req, res) => {
const collection = await loadPostsCollection();
let id = req.params.id;
res.send(await collection.find({}).toArray());
res.status(201).send();
});
...以便它根据数据的 id 从 MongoDB 返回特定数据。我不确定如何设置 res.send
以便它根据 req.params.id
查找数据。我尝试像这样传递 req.params.id
...
postRoutes.get('/edit/:id', async (req, res) => {
const collection = await loadPostsCollection();
let id = req.params.id;
res.send(await collection.find({ _id: mongodb.ObjectId(req.params.id)}).toArray());
res.status(201).send();
});
...但这也不起作用。知道如何设置此路由以便它根据 ID 参数查找数据吗?谢谢!
我的完整 Express 路由器页面如下:
const express = require('express');
const postRoutes = express.Router();
const mongodb = require('mongodb')
postRoutes.get('/', async (req, res) => {
const collection = await loadPostsCollection();
res.send(await collection.find({}).toArray());
});
postRoutes.post('/add', async (req, res) => {
const collection = await loadPostsCollection();
let task = req.body;
await collection.insertOne(task);
res.status(201).send();
});
postRoutes.get('/view/:id', async (req, res) => {
const collection = await loadPostsCollection();
let id = req.params.id;
res.send(await collection.find({}).toArray());
res.status(201).send();
});
postRoutes.delete('/delete/:id', async (req, res, next) => {
const collection = await loadPostsCollection();
collection.deleteOne({ _id: mongodb.ObjectId(req.params.id) });
res.status(200).send({});
});
async function loadPostsCollection() {
const client = await mongodb.MongoClient.connect(
'...',
{
useNewUrlParser: true
}
);
return client.db("test").collection("todos")
}
module.exports = postRoutes;
最佳答案
你最好使用 findOne
方法,如下所示:
const { ObjectID } = require("mongodb");
postRoutes.get("/view/:id", async (req, res) => {
const collection = await loadPostsCollection();
let id = req.params.id;
let result = await collection.findOne({
_id: new ObjectID(id)
});
if (!result) {
return res.status(400).send("Not found");
}
res.status(200).send(result);
});
关于javascript - 如何使用参数设置 Express 路线,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60519565/