Using $push within Array in mongoose

Question

i have an array inside my NetworkSchema which i am trying to update with another entry using findOneandupdate in mongoose

My model:

var mongoose = require('mongoose'),
Schema = mongoose.Schema;

var NetworkSchema = new Schema({

UserID: {
    type: String,
    default: '',
    trim: true
},
NetworkList: [{
    Fid: {

        type: Schema.ObjectId,
        ref: 'User'
    }
}]});

Html:

<div ng-controller="AuthenticationController" style="margin-top: 50px">

<div ng-controller="NetworksController">
    <ul>

        <li ng-repeat="Network in Networkfriends">

            {{Network.firstName}}
            <button type="submit" class = "btn btn-default" data-ng-click="update(Network._id)">Add as a Friend</button>
        </li>
    </ul>
    <button type="submit" ng-click="showlist()">show</button>
</div>
</div>

Network Controller:

$scope.update = function(FriendID)
    {
        var UserID = this.authentication.user._id;
        console.log('User ID :' +UserID);
        var NetworkList = [{

            Fid: this.FriendID
        }];

        $http.post('/networks/update',{UserID: UserID, FriendID: FriendID}, $scope.credentials).success(function(response){
            console.log(JSON.stringify(response));

        });
}

Network.Server.Controller:

var mongoose = require('mongoose'),
    errorHandler = require('./errors.server.controller'),
    Network = mongoose.model('Network'),
    _ = require('lodash');
    util = require('util');

exports.update = function(req, res) {

var query={'UserID':req.body.UserID};


var NetworkList = [{Fid: req.body.FriendID}];
var update = {'NetworkList' :NetworkList};


Network.findOneAndUpdate(query,update,function(err){
    if (err) {
        return err;
    } else {
        NetworkList.push(req.body.FriendID);

    }
});
};

i want to add the objectID of user from usersList which i am getting from NetworkFriends in my HTML page as you can see above, whenever i click Add as a Friend button and what i am getting is a new entry in my database with ObjectID of NetworkFriend and i want comma separated objectID's of more than one NetworkFriend through Add as a Friend button

Here is the entry in My Database:

{
"NetworkList" : [ 
    {
        "Fid" : ObjectId("5486fab40bc27314276be8cf"),
        "_id" : ObjectId("548d6ed5d6994cac219f536f")
    }
],
"UserID" : "547eaaab6c39471c3f5aebb6",
"__v" : 0,
"_id" : ObjectId("548adbc8b7eac44013bf188d")

}

My aim is:

 {
"NetworkList" : [ 
    {
        "Fid" : ObjectId("5486fab40bc27314276be8cf"),"(objectID of another friend with comma separated like this"),
        "_id" : ObjectId("548d6ed5d6994cac219f536f")
    }
],
"UserID" : "547eaaab6c39471c3f5aebb6",
"__v" : 0,
"_id" : ObjectId("548adbc8b7eac44013bf188d")

}

JohnnyHK · Accepted Answer · 2014-12-14 17:33:47Z

1

What you're aiming for isn't a valid structure. What you likely want instead is a schema where NetworkList directly contains an array of ObjectIds of the user's friends:

var NetworkSchema = new Schema({
    UserID: {
        type: String,
        default: '',
        trim: true
    },
    NetworkList: [{
        type: Schema.ObjectId,
        ref: 'User'
    }]
});

Your docs would then look like:

{
    "_id" : ObjectId("548adbc8b7eac44013bf188d"),
    "NetworkList" : [ 
        ObjectId("5486fab40bc27314276be8cf") 
    ],
    "UserID" : "547eaaab6c39471c3f5aebb6",
    "__v" : 0
}

Then you can add a new friend to NetworkList using the $push operator like this:

exports.update = function(req, res) {
    var query={'UserID': req.body.UserID};
    var update = {$push: {'NetworkList': req.body.FriendID}};

    Network.findOneAndUpdate(query, update, function(err, doc){ ... });
};

answered Dec 14, 2014 at 17:33

JohnnyHK

313k70 gold badges632 silver badges479 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Shailesh Shekhawat Over a year ago

A big Thanks for answer. But when i am trying your solution, ObjectID of user is going to server controller but not saving in my database, this is my findOneandUpdate Network.findOneAndUpdate(query,update,function(err){ if (err) { return err; } else{ console.log('hahahahaha'); } }); can you tell me where i am going wrong?

JohnnyHK Over a year ago

Instead of return err;, call console.log(err); so you can see any errors.

Shailesh Shekhawat Over a year ago

it worked by using find and update separately, can you explain me how to use post save middleware in mongoose as i am trying to switch UserID and FriendID after save. i was trying to use NetworkSchema.post('save',function(){ NetworkSchema.find({'to': this.FriendID},function(err){ if(err){ return err; } }); NetworkSchema.update({'from': this.UserID},function(err){ if(err){ return err; } }); console.log('post save working'); }); It is now working for now can you suggest me where i am wrong

JohnnyHK Over a year ago

Glad you got it working. It would be best to post the question about middleware as a new question.

Collectives™ on Stack Overflow

Using $push within Array in mongoose

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related