Problem with inserting data into MongoDB

Question

Problem with inserting data into MongoDB

I am facing a challenge with my Mongo DB structure, which is structured as follows:

db.users.find().pretty();
{
    "_id" : ObjectId("52b42b148ffa91f7ebbe8ebc"),
    "username" : "test",
    "password" : "test",
    "party" : [
        "4988",
        "5037"
    ],
    "something" : [
        "3571"
    ],
    "ludilo" : [],


}

In my application built on express js, I use this module to connect to Mongo https://npmjs.org/package/mongodb.

My question is how can I add a new entry into the "something" array for a user based on the session id.

I attempted the following code snippet, but unfortunately it did not work as expected

var collection = db.collection('users');
         collection.find({'_id':new ObjectID(req.user.id)}).toArray(function(err, items) {
            console.dir(items);
          }).insert({"something":"1234"});

javascript mongodb express

Answer 1

Answer №1

To add a new value to an array, you can use the $push method like this:

db.users.update(
    { _id: ObjectId( "52b42b148ffa91f7ebbe8ebc" ) },
    { $push: { something: "1234" } }
)

If you want to avoid duplicates in your array, you can utilize the $addToSet command instead:

db.users.update(
    { _id: ObjectId( "52b42b148ffa91f7ebbe8ebc" ) },
    { $addToSet: { something: "1234" } }
)

Answer 2

To add a new value to an array, you can use the $push method like this:

db.users.update(
    { _id: ObjectId( "52b42b148ffa91f7ebbe8ebc" ) },
    { $push: { something: "1234" } }
)

If you want to avoid duplicates in your array, you can utilize the $addToSet command instead:

db.users.update(
    { _id: ObjectId( "52b42b148ffa91f7ebbe8ebc" ) },
    { $addToSet: { something: "1234" } }
)

Answer 3

Answer №2

Here's a snippet of code you can test out:

collection.find({_id: new ObjectID(req.user.id)}).toArray(function(err, items) {
  var doc = items[0];
  doc.something.push('1234');
  collection.update({_id: doc._id}, {$set: {something: doc.something}}, {safe: true}, function() {
    //carry out your next steps
  });
});

I've tested this code locally and it seems to be functioning properly.

Answer 4

Here's a snippet of code you can test out:

collection.find({_id: new ObjectID(req.user.id)}).toArray(function(err, items) {
  var doc = items[0];
  doc.something.push('1234');
  collection.update({_id: doc._id}, {$set: {something: doc.something}}, {safe: true}, function() {
    //carry out your next steps
  });
});

I've tested this code locally and it seems to be functioning properly.

Problem with inserting data into MongoDB

Answer №1

Answer №2

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