我在通过Mongoose中的_id(5e335c57bd37eb1dd4d99b1f)来删除单个产品时,让删除路径正常工作时遇到问题。我认为只需复制更新路由并对其进行一些更改即可。其他所有路线在Postman中都可以正常工作。
products.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 中的错误:
<!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
find返回一个数组,并且在数组中没有remove()方法。您需要使用findOne
。当未找到任何内容时,find不会抛出错误。因此,您最好检查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}`);
});
});
您也可以使用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}`);
});
});