How can I access an array of object with their own _id and update it with Mongo/Mongoose?
Take a look to my update query and check if there's something wrong, because this code doesn't return any error, but it doesn't really update the field
modelUser.findOneAndUpdate(
{ userName: body.author, "portfolio._id": body.id },
{ new: true },
{
$set: { //I thing the problem it's over here
"portfolio.$.profitLoss": profitLoss,
"portfolio.$.percentage": percentage
}
},
(err, user) => {
if (err) {
console.log(err);
}
console.log(`Done`);
}
);
This is my User Schema:
const userSchema = new Schema({
...stuff,
portfolio: [
{
coin: String,
amount: String,
price: String,
bought: Date,
profitLoss: String,
percentage: String
}
],
});
Basically i think mongo just don't know which of these sub documents should update, I don't know if there's something like another findOneAndUpdate for sub object/document by id.
Just changed findOneAndUpdate to updateOne and everything works.
Related
Hey I was wondering how do I use findById for a schema inside an array? For example, I have the following Schema:
const GameSchema = new mongoose.Schema({
users: [
{
user: { type: mongoose.Schema.ObjectId, ref: 'User' },
role: {
type: String,
required: true,
enum: ['user', 'moderator', 'creator'],
default: 'user',
},
},
]
}]
I want to find the user with a mongoose function like findById, such as the following:
const user = await game.users.findById({ user: req.user.id })
It doesn't seem to work since users is not a mongodb model. I know I can find the user by using find() like the following:
const user = await game.users.find(
(gameUser) => gameUser.user == req.user.id
)
The only problem is that the type of gameUser and req.user.id is not the same and I can't use '==='. Is there some way to go through the array and use the mongoose function findById?
As docs explains, findById method:
Finds a single document by its _id field
So you have to use findOne() instead of findById().
Also, to return only one field from the entire array you can use projection into find.
Check this example. This query find an object by its id (i.e. user field) and return only the object, not the whole array.
db.collection.find({
"users": { "$elemMatch": { "user": 1 } }
},
{
"users.$": 1
})
Using mongoose you can do:
yourModel.findOne(({
"users": { "$elemMatch": { "user": 1 } }
},
{
"users.$": 1
})).then(result => {
console.log(result)
}).catch(e => {
// error
})
I'm trying to update an array in document by adding object if it doesn't exist, and replacing the object in array otherwise. But nothing ($push, $addToSet) except the $set parameter does anything, and $set works as expected - overwrites the whole array.
My mongoose schema:
var cartSchema = mongoose.Schema({
mail: String,
items: Array
});
The post request handler:
app.post('/addToCart', function(req, res) {
var request = req.body;
Cart.findOneAndUpdate({
"mail": request.mail
}, {
$addToSet: {
"items": request.item
}
}, {
upsert: true
},
function(err, result) {
console.log(result);
}
);
res.send(true);
});
The data that I'm sending from the client:
{
"mail":"test#gmail.com",
"item":{
"_id":"59da78db7e9e0433280578ec",
"manufacturer":"Schecter",
"referenceNo":"Daemon-412",
"type":"Gitare",
"image":"images/ba9727909d6c3c26412341907e7e12041507489988265.jpeg",
"__v":0,
"subcategories":[
"Elektricne"
]
}
}
EDIT:
I also get this log when I trigger 'addToCart' request:
{ MongoError: The field 'items' must be an array but is of type object in
document {_id: ObjectId('5a19ae2884d236048c8c91e2')}
The comparison in $addToSet would succeeded only if the existing document has the exact same fields and values, and the fields are in the same order. Otherwise the operator will fail.
So in your case, request.item always need to be exactly the same.
I would recommend creating a model of "item". Then, your cart schema would be like:
var cartSchema = mongoose.Schema({
mail: String,
items: [{
type: ObjectId,
ref: 'item',
}],
});
And let MongoDB determine if the item exist.
this should work you just need to implement objectExits function that test if the item is that one you're looking for :
Cart.findOne({ "mail": request.mail })
.exec()
.then(cart => {
var replaced = cart.items.some((item, i) => {
if (item._id == request.item._id)) {
cart.items[i] = request.item;
return true;
}
})
if (!replaced) {
cart.items.push(request.item);
}
cart.save();
return cart;
})
.catch(err => {
console.log(err)
});
I know how to add object to collection in MongoDB using Node.js, for example:
router.post('/addProduct', function (req, res) {
Partner.findByIdAndUpdate({ _id: req.body.partnerId }, { $push: { "products": { name: req.body.dataProduct.name } } }, { safe: true }, function (err, response) {
if (err) throw err;
res.json(response);
});
});
but what if in product will be another table? How can I simply add object there?
Let's say this is my schema:
var partnerSchema = new mongoose.Schema({
name: String,
products: [
{
name: String,
campaignList: [
{
name: String,
type: String,
startDate: Date,
endDate: Date,
paymentMethod: String,
partnerPayout: Number,
ourPayout: Number
}
]
}]
});
ID in each partner and product are default ._id eg. partner._id and product._id. That's why aren't in schema above. However I sending them from FrontEnd to BackEnd as a req.parameter - normally thing but i wanted to say it for sure :)
Your best bet would bet to define the Schema & Model for the campaign on its own, and add it to the Partner by reference using the _id
var partnerSchema = new mongoose.Schema({
name: String,
products: [
{
name: String,
campaignList: [
{ type : mongoose.Schema.Types.ObjectId, ref : 'campaignModel' }
]
}]
});
var campaignSchema = new mongoose.Schema({
name: String,
type: String,
startDate: Date,
endDate: Date,
paymentMethod: String,
partnerPayout: Number,
ourPayout: Number
});
var campaignModel = mongoose.model('campaignModel', campaignSchema);
var partnerModel = mongoose.model('partnerSchema', partnerSchema);
A good practice is to look for times where you're trying nest semi-complex data, or objects with more than two or three keys, and extract them into their own collection. Not only does it make it easier to search for those documents, it makes it easier to use them in conjunction with other objects.
Be sure to call .populate() during your query so that MongoDB knows to nest the documents from the other collections, otherwise, you'll just have an array of ObjectId.
First match the required products array position. You can confirm this by testing a simple find like:
Partner.find({_id: req.body.partnerId), 'products.name': req.body.dataProduct.name }, { 'products.$': 1})
Use the positional $ operator to push the new object into the array in the matched product element:
Partner.update({_id: req.body.partnerId), 'products.name': req.body.dataProduct.name }, { $push: { 'products.$.campaignList': { name: 'new campaign' }}})
Reference https://docs.mongodb.com/manual/reference/operator/update/positional/
try this:
router.post('/addProduct', function (req, res) {
Partner.findOneAndUpdate({ _id: req.body.partnerId }, { $push: { "products": { name: req.body.dataProduct.name, $push: {"campaignList": {name: req.body.name}} } } }, { safe: true }, function (err, response) {
if (err) throw err;
res.json(response);
});
});
i hope it helps you
I'm learning Node / Mongoose, and trying to figure out how to prevent duplicates in an array of ListItems:
var listitemSchema = new mongoose.Schema({
name: String,
rank: Number
});
...which exist inside a user:
var userSchema = new mongoose.Schema({
username: String,
password: String,
list: [{
type: mongoose.Schema.Types.ObjectId,
ref: "ListItem"
}]
});
...based on whether the user already has the name within his/her list. I was looking into $addtoset but can't really figure out how to put conditions when dealing with an object. The docs weren't very helpful and I can't seem to find similar examples online.
Right now my 'POST' request is a mess and looks like this:
router.post("/editlist", isLoggedIn, function(req,res){
User.findById(req.user._id).populate("list").exec(function(err , user) {
if(err) {
console.log(err);
res.redirect("/editlist");
} else {
//prevent duplicates based on username
User.update(
{ "_id": req.user._id },
{ $addToSet: { "streamName": req.body.listitem.name}
});
res.redirect("/watch");
}
});
});
Can anyone send me on my way? My $addToSet isn't pushing items onto the list array.
According to the $addToSet documentation, the operator is used in this form:
{ $addToSet: { field1: value1, ... } }
where field is an Array.
To add an item to the list array, we do:
User.update({
{ "_id": req.user._id },
{ $addToSet: { list: {"streamName": req.body.listitem.name } }}
});
You'll need to update the userSchema definition:
var userSchema = new mongoose.Schema({
username: String,
password: String,
list: [listitemSchema]
});
I have this little schema for users:
{
username: String,
contacts: Array
}
So for example some user's contacts will look like this:
{
username: "user",
contacts: [{'id': ObjectId('525.....etc'), 'approved': false}, {'id':ObjectId('534.....etc'), 'approved': true}]
}
Now I need to delete an item from contacts so I do:
model.findByIdAndUpdate(23, {'$pull': {
'contacts':{'id':'525.....etc'}
}});
but seems not working, no errors but it doesn't gets deleted, I just would like to return this document for the user:
{
username: "user",
contacts: [{'id':ObjectId('534.....etc'), 'approved': false}]
}
how to achieve this?
The $pull operator actually just performs the conditions on the array element on which it is operating. It seems that your question might not actually show that you are probably working with an ObjectId value that mongoose creates by default for all array fields.
So you could to your query like this, after importing the ObjectId creation method:
model.findByIdAndUpdate(23, {
'$pull': {
'contacts':{ '_id': new ObjectId(someStringValue) }
}
});
Or in fact you can actually define your "schema" a little better, and mongoose will actually "autocast" the ObjectId for you based on the "type" defined in the schema:
var contactSchema = new Schema({
approved: Boolean
});
var userSchema = new Schema({
username: String,
contacts: [contactSchema]
});
This allows mongoose to "follow the rules" for strictly typed field definitions. So now it knows that you actually have an _id field for each element of the contacts array, and the "type" of that field is actually an ObjectId so it will automatically re-cast "String" values supplied as a true ObjectId.
finaly!
MongoDB:
"imgs" : {"other" : [ {
"crop" : "../uploads/584251f58148e3150fa5c1a7/photo_2016-11-09_21-38-55.jpg",
"origin" : "../uploads/584251f58148e3150fa5c1a7/o-photo_2016-11-09_21-38-55.jpg",
"_id" : ObjectId("58433bdcf75adf27cb1e8608")
}
]
},
router.get('/obj/:id', function(req, res) {
var id = req.params.id;
Model.findOne({'imgs.other._id': id}, function (err, result) {
result.imgs.other.id(id).remove();
result.save();
});