Updating and adding fields within a nested object in mongoDB

Question

Updating and adding fields within a nested object in mongoDB

In my mongoDB document, I am looking to insert additional data:

{
    "_id" : "7KufvMQFyyeuKFP68",
    "target" : {
        "10" : "true",
        "id" : "ePce6fBAHx9KeKjuM"
    }
}

I want to update the existing fields in target or add new ones if needed. Here is the code I attempted:

var result = { "30": "true", "id" : "ePce6fBAHx9KeKjuM" };

Collection.upsert(
    { _id: id }, 
    { $set: { target: result } }
);

However, when I ran this code, the value of 10 was replaced by 30, while what I actually wanted was:

{
    "_id" : "7KufvMQFyyeuKFP68",
    "target" : [{
        "10" : "true",
        "30" : "true",
        "id" : "ePce6fBAHx9KeKjuM"
    }]
}

javascript mongodb

Answer 1

Answer №1

If you're looking to update an array of objects, ensure that the type is set to an array in your schema with the target field as the array. To update the array, simply select it by the ID or field of your choice.

The following code snippet locates the specified field and inserts "30" : "true", while preserving the rest of the object within the array. Hopefully, this solution proves helpful:

const userSchema = new mongoose.Schema({
    name: String,
    target: Array
});

const User = mongoose.model("User", userSchema);

const user1 = new User({
    name: "jack",
    target: [{
        "10": "true",
        "id": "ePce6fBAHx9KeKjuM"
    }]
});

user1.save(user1, (err, user) => {
    console.log(user);
});

User.findOneAndUpdate(
    {"name": "jack"},
    {safe: true, upsert: true, new: true},
    (err, model) => {
        model.target[0]["30"] = "true";
        console.log(model.target);
    }
);

Answer 2

If you're looking to update an array of objects, ensure that the type is set to an array in your schema with the target field as the array. To update the array, simply select it by the ID or field of your choice.

The following code snippet locates the specified field and inserts "30" : "true", while preserving the rest of the object within the array. Hopefully, this solution proves helpful:

const userSchema = new mongoose.Schema({
    name: String,
    target: Array
});

const User = mongoose.model("User", userSchema);

const user1 = new User({
    name: "jack",
    target: [{
        "10": "true",
        "id": "ePce6fBAHx9KeKjuM"
    }]
});

user1.save(user1, (err, user) => {
    console.log(user);
});

User.findOneAndUpdate(
    {"name": "jack"},
    {safe: true, upsert: true, new: true},
    (err, model) => {
        model.target[0]["30"] = "true";
        console.log(model.target);
    }
);

Updating and adding fields within a nested object in mongoDB

Answer №1

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