We Keep Coding

Adding to an array in MongoDB using $addToSet

I'm trying to add data to an array defined in my mongoDB called "signedUp" it is within my Timetable Schema. So far i've been able to update other fields of my schema correctly however my signedUp array always remains empty. I ensured the variable being added was not empty.
Here is my Schema
var TimetableSchema = new mongoose.Schema({
date: {
type: String,
required: true,
trim: true
},
spaces: {
type: Number,
required: true
},
classes: [ClassSchema],
signedUp: [{
type: String
}]
});
This was my latest attempt but no value is ever added to the signedUp array.
My API update request
id = {_id: req.params.id};
space = {spaces: newRemainingCapacity};
signedUp = {$addToSet:{signedUp: currentUser}};
Timetable.update(id,space,signedUp,function(err, timetable){
if(err) throw err;
console.log("updates");
res.send({timetable});
});
Thanks

You can take a look at db.collection.update() documentation. Second parameter takes update and 3rd one represents operation options while you're trying to pass your $addToSet as third param. Your operation should look like below:
id = {_id: req.params.id};
space = { $set: { spaces: newRemainingCapacity }};
signedUp = { $addToSet:{ signedUp: currentUser}};
update = { ...space, ...signedUp }
Timetable.update(id,update,function(err, timetable){
if(err) throw err;
console.log("updates");
res.send({timetable});
});

space and signedUp are together the second argument.
try this:
id = {_id: req.params.id};
space = {spaces: newRemainingCapacity};
signedUp = {$addToSet:{signedUp: currentUser}};
Timetable.update(id, {...space, ...signedUp}, function(err, timetable){
if(err) throw err;
console.log("updates");
res.send({timetable});
});

Mongoose .findOne Error returns the model found?

So I'm trying to access this account by using the findOne function in mongoose, and I'm trying to console.log the error, but the error is just the correct model found.. once I find the correct model I want to access one of the nested objects in the schema so I can edit the value.
I'm not sure why this is happening, below I put the code as well as the error that was logged into the console, I can provide more if needed.
let accountSchema = mongoose.Schema({
username:{
type: String,
required: true,
index: true,
unique: true,
},
password:{
type: String,
required: true,
},
money:{
type: Number,
},
inventory: { type: [{
weed: { type: Number },
coke: { type: Number },
}]},
});
mp.events.addCommand('coke', (player) => {
console.log(player.name);
Account.findOne({username: 'a'}, function(acc, err) {
if(err) return console.log(err);
console.log(acc.username);
acc.inventory[1] = acc.inventory[1] + 1;
acc.save(function(err){
if(err) return player.outputChatBox('Not logged in');
player.outputChatBox('Added 1 coke');
});
});
});
(Console) {"_id":"5b6acbbbc285477e39514cb9","username":"a","password":"$2a$10$XABqooqFRINYVdJ79.i2E.5xdpitRrfZxUBmIPAZjjaXKvvLDc2y2","money":5000,"inventory":[{"_id":"5b6acbbbc285477e39514cbb","weed":0},{"_id":"5b6acbbbc285477e39514cba","coke":0}],"__v":0}

The callback function for the .findOne method has the following signature:
function (err, obj) {
}
You are using the arguments in the wrong order - the error object is the first argument and the object found is the second one.

The .findOne method callback must have the following parameters function (err, res). So you are setting them in a reversed order.
Check http://mongoosejs.com/docs/api.html#model_Model.findOne

Error Handling: E11000 duplicate key error collection

I am having a problem with the user model that I'm using with Mongoose and MongoDB to create each profile in my database. It works fine to post one user, but throws the following error if I logout and try again:
{
"name": "MongoError",
"message": "E11000 duplicate key error collection: CourtAPIDev.users index: trackers.case_id_1 dup key: { : null }",
"driver": true,
"index": 0,
"code": 11000,
"errmsg": "E11000 duplicate key error collection: CourtAPIDev.users index: trackers.case_id_1 dup key: { : null }"
}
According to mongoose documentation: If there is more than one document (a second user) without a value for the indexed field or is missing the indexed field, the index build will fail with a duplicate key error. I don't know how to set this _id property for the trackers property –– I thought it generated automatically!
Here's the trackers part of my Schema. And the relevant case_id property, which seems to be throwing the "null" error.
The whole repository can be found on my Github here, but the likely problem spots are the ones I highlighted, I think. Here's the github link: https://github.com/KingOfCramers/node_login_with_trackers
user model:
const UserSchema = new mongoose.Schema({
email: {
type: String,
required: true,
trim: true,
minLength: 1,
unique: true,
validate: {
validator: (value) => {
return validator.isEmail(value);
},
message: '{VALUE} is not a valid email'
}
},
password: {
type: String,
required: true,
minlength: 6
},
tokens: [{
access: {
type: String,
required: true
},
token: {
type: String,
required: true
}
}],
trackers: {
tweets: [TwitterSchema],
legislation: [LegislationSchema],
court_cases: [CourtCaseSchema]
},
frequency: [EmailSchema]
});
Express route:
app.post("/users", (req,res) => {
var body = _.pick(req.body, ['email', 'password']);
body.frequency = {
alert_time: new Date(),
email: req.body.email
}
var user = new User(body);
user.save().then(() => {
return user.generateAuthToken();
}).then((token) => {
res.header("x-auth", token);
res.send(user);
}).catch((e) => {
res.status(400).send(e);
});
});
Test (mocha):
it("Should post a new user", (done) => {
var email = "uniqueemail#example.com"
var password = "9webipasd"
supertest(app)
.post("/users") // Post request to the /todos URL
.send({
email,
password
})
.expect(200)
.expect((res) => {
expect(res.headers).toIncludeKey('x-auth')
expect(res.body._id).toExist();
expect(res.body.email).toBe(email);
})
.end((err) => {
if(err){
return done(err);
}
User.findOne({email}).then((user) => {
expect(user).toExist();
expect(user.password).toNotBe(password);
done();
}).catch((e) => done(e));
});
});

My guess is that there is an index on CourtCaseSchema.case_id which does not allow duplicates.
I think you could check (in a mongo shell) that with CourtAPIDev.court_cases.getIndexes() (I think your db is named CourtAPIDev and the collection is named court_cases but I am not sure about that).
Also if you clean the test db after each run, that would explain why the tests are passing, since there is no more than one user.

Turns out, it was to do with my mongodb database, not any of my code. After searching around online, I found that if I logged into the mongo shell and then dropped all indexes from the users collection, it solved my problem. Could someone explain why this was causing my program to crash? I think it may have to do with an old user model, but I don't really understand. Thanks!

Even if you have all of your keys as unique=False, you may still get E11000 duplicate key error. So in that case, just follow these steps and check if your error is resolved.
Delete all documents from the collection (e.g. db.collection_name.deleteMany({}))
Drop the COLLECTION (NOT THE DATABASE) (e.g db.collection_name.drop())
Cheers !!

Mongoose request for id field returns id and _id

In my Mongoose schema I have an id field which has a unique ID for each document. This runs off the same system used by the default _id field like so:
var JobSchema = new mongoose.Schema({
id: { type:String, required:true, unique:true, index:true, default:mongoose.Types.ObjectId },
title: { type: String },
brief: { type: String }
});
module.exports = mongoose.model("Job", JobSchema);
Now, if I query the schema to get id and title I'd do it like this:
Job.find().select("id title").exec(function(err, jobs) {
if (err) throw err;
res.send(jobs);
});
However, I've found this returns id and title as expected, but it also return the default _id field. Why is that and how do I stop it?

Inside the find() function you can pass two parameters (criteria and projection). Projection are the fields that you want (or not). In your case you can change your code to
Job.find({}, {_id:0, id: 1, title: 1}, function(err, jobs) {
if (err) throw err;
res.send(jobs);
});
and it should do it.

There is an option to prevent the id on schema level.
For me this worked perfectly fine.
new Schema({ name: String }, { id: false });
Mongoose Docs

MongoError,err:E11000 duplicate key error

I have a MongoDb schema like this
var User = new Schema({
"UserName": { type: String, required: true },
"Email": { type: String, required: true, unique: true },
"UserType": { type: String },
"Password": { type: String }
});
I am trying to create a new user
This is done in NodeJs using mongoose ODM
And this is the code for creating:
controller.createUser = function (req, res) {
var user = new models.User({
"UserName": req.body.UserName.toLowerCase(),
"Email": req.body.Email.toLowerCase(),
"UserType": req.body.UserType.toLowerCase()
});
models.User.findOne({ 'Email': user.Email }, function (err, olduser) {
if (!err) {
if (olduser) {
res.send({ 'statusCode': 409, 'statusText': 'Email Already Exists' });
}
else if (!olduser) {
user.setPassword(req.body.Password);
user.save(function (err, done) {
if (!err) {
console.log(user);
res.send({ 'statusCode': 201, 'statusText': 'CREATED' });
}
else {
res.send({ 'Status code': 500, 'statusText': 'Internal Server Error' });
}
});
}
}
else {
res.send({ 'statusCode': 500, 'statusText': 'ERROR' });
}
});
};
The for creating new user,I am giving attributes and values as follows:
{
"UserName": "ann",
"Email": "ann#ann.com",
"UserType": "normaluser",
"Password":"123456"
}
And I am getting error like this:
{"Status code":500,"statusText":"Internal Server Error","Error":{"name":"MongoError","err":"E11000 duplicate key error index: medinfo.users.$UserName_1 dup key: { : \"ann\" }","code":11000,"n":0,"connectionId":54,"ok":1}}
I understand that this error is because UserName is duplicated ,but I haven't set UserName with unique constraint.Whenever I add a new row,I need only email to be unique,UserName can be repeated.How to achieve this??

#ManseUK Is probably right, that looks like UserName is a 'key' - in this case an index. The _id attribute is the "primary" index that is created by default, but mongodb allows you to have multiple of these.
Start a mongo console and run medinfo.users.getIndexes()? Something must have added an index on 'UserName'.
required: true wouldn't do that, but you might have played with other settings previously and the index hasn't been removed?

There should be an index that is blocking.
You can try the db.collection.dropIndex() method
medinfo.users.dropIndexes()

I got the similar issue on my project. I tried to clear out all the documents and the dup issue still keep popping up. Until I dropped this collection and re-start my node service, it just worked.

What I had realized is that my data-structures were changing -- this is where versioning comes in handy.
You may need to get a mongoose-version module, do a thing.remove({}, ...) or even drop the collection: drop database with mongoose
I use RoboMongo for an admin tool (and I highly recommend it!) so I just went in and right-clicked/dropped collection from the console.
If anyone knows how to easily version and/or drop a collection from within the code, feel free to post a comment below as it surely helps this thread ( and I :) ).