我在通过获取 Mongoose 中的 _id (5e335c57bd37eb1dd4d99b1f) 来删除单个产品时遇到问题。我认为简单地复制更新路线并稍微改变一下就可以了。所有其他路线在 Postman 中都工作正常。
产品.js
const express = require("express"),
router = express.Router(),
Product = require("../models/product.model");
// Product list route
router.get("/", function(req, res) {
Product.find().then(products => {
res.status(200).json(products);
}).catch(err => {
res.status(400).send(`Recieving products failed. Error details: ${err.message}`);
});
})
// Product details route
router.get("/:product_id", function(req, res) {
Product.findById(req.params.product_id).then(product => {
res.status(200).json(product);
}).catch(err => {
res.status(400).send(`Recieving product details failed. Error details: ${err.message}`);
});
})
// Product create logic route
router.post("/add", function(req, res) {
let product = new Product(req.body);
product.save().then(product => {
res.status(200).json({"product": `Product added successfully. Created product details: ${product}`});
}).catch(err => {
res.status(400).send(`Adding new product failed. Error details: ${err.message}`);
});
})
// Product update route
router.put("/:product_id", function(req, res) {
Product.findById(req.params.product_id).then(product => {
product.name = req.body.name;
product.description = req.body.description;
product.price = req.body.price;
product.stock = req.body.stock;
product.save().then(product => {
res.status(200).json(`Product updated! Updated product details: ${product}`);
}).catch(err => {
res.status(400).send(`Update not possible. Error details: ${err.message}`);
});
}).catch(err => {
res.status(404).send(`Product not found. Error details: ${err.message}`);
});
})
// Product destroy route (NOT WORKING)
router.delete("/:product_id", function(req, res) {
Product.find(req.params.product_id).then(product => {
product.remove().then(product => {
res.status(200).json(`Product deleted! Deleted product details: ${product}`);
}).catch(err => {
res.status(400).send(`Delete not possible. Error details: ${err.message}`);
});
}).catch(err => {
res.status(404).send(`Product not found. Error details: ${err.message}`);
});
})
module.exports = router;postman 错误:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot DELETE /products/5e335c57bd37eb1dd4d99b1f</pre>
</body>
</html>谢谢
最佳答案
find返回一个数组，数组中没有remove()方法。您需要使用findOne。当没有找到任何东西时， find 也不会抛出错误。所以你最好检查一下find是否返回null。
router.delete("/:product_id", function(req, res) {
Product.findOne(req.params.product_id)
.then(product => {
if (product) {
product
.remove()
.then(product => {
res.status(200).json(`Product deleted! Deleted product details: ${product}`);
})
.catch(err => {
res.status(400).send(`Delete not possible. Error details: ${err.message}`);
});
} else {
res.status(404).send(`Product not found. Error details: ${err.message}`);
}
})
.catch(err => {
res.status(500).send(`Error details: ${err.message}`);
});
});
您还可以使用 findByIdAndDelete 方法缩短此代码，如下所示:
router.delete("/:product_id", function(req, res) {
Product.findByIdAndDelete(req.params.product_id)
.then(product => {
if (product) {
return res.status(200).json(`Product deleted! Deleted product details: ${product}`);
} else {
return res.status(404).send("Product not found");
}
})
.catch(err => {
res.status(500).send(`Error details: ${err.message}`);
});
});
关于javascript - 如何让此 DELETE 路由在我的 products.js 路由中工作？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59996309/