Store Json object in mongoDb with fetch request - node.js

Question

I have a User model and trying to add education field to mongoDB as json object as follows,
User model
education: {
"school": String,
"years":Number
},
Client
//add Education section
const updateEducation = async (e) => {
e.preventDefault();
await fetch(`http://localhost:5000/api/user/updateEducation`, {
method: "PUT",
headers: { "Content-Type": "application/JSON", token: accessToken },
body: JSON.stringify({ userid: userid, educationSchool: educationSchool,
educationYearText: EducationYear}),
})
.then((res) => res.json())
.then((data) => {
console.log("User education is:", data.education +""+data.educationYear);
});
};
Server
const updateEducation = async (req, res) => {
try {
const user = await User.findOneAndUpdate(
{ _id: req.body.userid },
{
$set: {
'education.school': req.body.educationSchool,
'education.years': req.body.educationYearText,
},
}
);
if (!user) {
res.status(404).json("user not exist");
}
res
.status(200)
.json({
education: user.education.School,
educationYear: user.education.years,
});
} catch (error) {
res.status(500).send({ error: error.message });
}
};
When im hitting this endpoint in postman http://localhost:5000/api/user/updateEducation
{
"userid":"63bbe4df75dca5aac7576e47",
"educationSchool":"Test college",
"educationYearText":"2018"
}
Im getting {
"error": "Plan executor error during findAndModify :: caused by :: Cannot create field 'school' in element {education: []}"
}
Whats wrong?

Answer 1

You should $push into an array:
const user = await User.findOneAndUpdate(
{ _id: req.body.userid },
{
$push: {
education: {
school: req.body.educationSchool,
years: req.body.educationYearText,
}
},
},
{ new: true }
);