Finding and Updating record - Mongoose - node.js

Question

I am building an API to store friends names for a game, I have built the API to receive the post request as so :
exports.addFriends = async (req, res) => {
try {
console.log('hit');
console.log(req.body.friendNames);
const addUser = await User.updateOne(
{ uniqueid: req.body.uniqueid },
{ $push: { friendNames: [req.body.friendNames] } }
);
res.json({
addUser
});
} catch (error) {
console.log(error);
}
};
ad the post request as
const friends = await axios.post('/api/v1/users/add/friends', {
uniqueId: this.uniqueid,
friendNames: [
{
userName: 'test',
region: 'euw'
}
]
});
My API is being hit as a see the logs, but no record is made. My User Schema is as so
const userSchema = new mongoose.Schema({
uniqueid: {
type: String,
required: true,
trim: true
},
summonerName: {
type: String
},
friendNames: [
{
userName: String,
region: String
}
]
});
I get no error and the request seems to go through, but no records are added. Any ideas?

Answer 1

$push is used to add one element to the array. But using the $each array update operator, we can push an array of items.
Also, I used findOneAndUpdate with new:true option to retrieve the updated document, because updateOne doesn't return the updated document.
exports.addFriends = async (req, res) => {
try {
console.log(req.body.friendNames);
const addUser = await User.findOneAndUpdate(
{ uniqueid: req.body.uniqueid },
{ $push: { friendNames: { $each: req.body.friendNames } } },
{ new: true }
);
res.json({ addUser });
} catch (error) {
console.log(error);
res.status(500).send("Something went wrong");
}
}
Let's say we have this existing document:
{
"_id": "5e31c749f26d5f242c69f3aa",
"uniqueid": "uniqueid1",
"summonerName": "John",
"friendNames": [
{
"_id": "5e31c749f26d5f242c69f3ab",
"userName": "Max",
"region": "Germany"
}
],
"__v": 0
}
Let's send a request to the controller with this request body:
{
"uniqueid": "uniqueid1",
"friendNames": [
{
"userName": "Andrew",
"region": "England"
},
{
"userName": "Smith",
"region": "USA"
}
]
}
The response will be like this:
{
"addUser": {
"_id": "5e31c749f26d5f242c69f3aa",
"uniqueid": "uniqueid1",
"summonerName": "John",
"friendNames": [
{
"_id": "5e31c749f26d5f242c69f3ab",
"userName": "Max",
"region": "Germany"
},
{
"_id": "5e31c763f26d5f242c69f3ad",
"userName": "Andrew",
"region": "England"
},
{
"_id": "5e31c763f26d5f242c69f3ac",
"userName": "Smith",
"region": "USA"
}
],
"__v": 0
}
}