如何更新mongoose中的子文档

Question

我的模式如下：

{
"blogTitle":"Book"
"blogContent":"demo"
"blogrelatedLink":{
"relatedBloogId:"123",
"relatedBlogTitle":"abc"`
}
}

我的代码是：

const updateBlogs = async (req, res) => {
const { blogId } = req.params;
const re = /<("[^"]?"|'[^']?'|[^'">])*>/;
if (re.test(req.params.blogTitle)) {
sendError(400, "Unsuccessful", "Blog Title cannot be HTML", req, res);
} else {
try {
let update = {};
if (req.body.blogTitle) update.blogTitle = req.body.blogTitle;
if (req.body.blogContent) update.blogContent = req.body.blogContent;
let blog = await Blog.updateOne(
{ blogId },
{
$set: update,
},
{ runValidators: true }
);
sendResponse(200, "Successfull", blog, req, res);
} catch (err) {
sendError(400, "Blog can't be updated by given id", err, req, res);
}
}
};

更新子文档的代码是什么

Answer 1

更新密钥应该是<main key name>.<sub key name>: <value to be update>格式，只需将其放在更新查询之前

if (req.body.blogrelatedLink) {
for (let key in req.body.blogrelatedLink) {
update['blogrelatedLink.' + key] = req.body.blogrelatedLink[key];
}
}

游乐场