_doc in request body - node.js

Question

I am trying to send an object created by MongoDB model as a body of post request in a jest test.
Here is the test:
test("post request successfully creates a new blog", async () => {
const newBlog = new Blog({
title: "My mundane day at home 3",
author: "AbG",
url: "https://www.google.co.in/",
likes: 11,
});
await api
.post("/api/blogs")
.send(newBlog)
.expect(201)
.expect("Content-Type", /application\/json/)
.catch((err) => console.log(err));
const blogs = await Blog.find({});
expect(blogs).toHaveLength(initialBlogs.length + 1);
});
As you can see, I am sending the newBlog as a body of request. But when I receive it in controller, the newBlog is present in the request.body._doc instead of request.body.
I think this has something to do with the mongoose model of blog.
const blogSchema = new mongoose.Schema({
title: {
type: String,
required: true,
},
author: {
type: String,
required: true,
},
url: {
type: String,
required: true,
},
likes: {
type: Number,
required: false,
default: 0,
},
});
module.exports = mongoose.model("Blog", blogSchema);
I cannot understand why this is happening.

Answer 1

I found out where I was going wrong.
In the test case, I was creating a mongodb schema instance and passing it as body of request instead of a plain JS object. And in the express app, I was trying to access the request body as a JS object. So that created a confusion.
The changes that I did:
In test:
Instead of
const newBlog = new Blog({....})
I did
const newBlog = {....}
So, I avoided passing mongodb object as request body and created the mongodb object using the constructor immediately before where I needed it.
Here is the post route:
blogsRouter.post("/", async (request, response) => {
const blog = new Blog(request.body);
const savedBlog = await blog.save();
response.status(201).json(savedBlog);
});