I have this data structure:
{
"_id": "5ebd08794bcc8d2fd893f4a7",
"username": "johan#gmail.com",
"password": "123",
"decks": [{
"cards": [{
"_id": "5ebd08794bcc8d2fd893f4a9",
"planeetnaam": "Venus",
"kleur": "Grijs"
},
{
"_id": "5ebd08794bcc8d2fd893f4aa",
"planeetnaam": "Neptunus",
"kleur": "Paars"
}
],
"_id": "5ebd08794bcc8d2fd893f4a8",
"name": "Planeten"
},
{
"cards": [{
"_id": "5ebd08794bcc8d2fd893f4ac",
"diernaam": "Hond",
"poten": "4"
},
{
"_id": "5ebd08794bcc8d2fd893f4ad",
"diernaam": "Kangoeroe",
"poten": "2"
}
],
"_id": "5ebd08794bcc8d2fd893f4ab",
"name": "Dieren"
}
],
"__v": 0
}
Now i want to add a new property to all the cards in deck with deckname: "Planeten". How do i do this with a mongoose query?
The cards array of deck "Planeten" should look like this after the query
"cards": [{
"_id": "5ebd08794bcc8d2fd893f4a9",
"planeetnaam": "Venus",
"kleur": "Grijs",
"newProp": null
},
{
"_id": "5ebd08794bcc8d2fd893f4aa",
"planeetnaam": "Neptunus",
"kleur": "Paars",
"newProp": null
}
],
EDIT:
This works in Robo3T:
db.getCollection('users').findOneAndUpdate(
{ '_id': ObjectId("5eba9ee0abfaf237f81fb104") },
{ $set: { 'decks.$[deck].cards.$[].newProp': null } },
{ arrayFilters: [{ 'deck._id': ObjectId("5eba9ee0abfaf237f81fb108") } ] }
)
But the server query doesnt edit any data:
User.findOneAndUpdate(
{ '_id': req.session.userid },
{ $set: { 'decks.$[deck].cards.$[].newProp': null } },
{ arrayFilters: [{ 'deck._id': req.params.deckid } ] }, function(err, user){
res.send('test');
})
Thanks in advance
you can use array update operators
the query may look something like that
db.collection.updateOne(
{ _id: <ObjectId> }, // the filter part
{ $set: { 'decks.$[deck].cards.$[].newProp': null } },
{ arrayFilters: [{ 'deck.name': 'Planeten' }] }
)
$[deck] refers to each element in the decks array
$[] is used to update all the elements in the cards array
your function may look something like that
User.updateOne(
{ '_id': req.session.userid },
{ $set: { 'decks.$[deck].cards.$[].newProp': null } },
{ arrayFilters: [{ 'deck.name': 'Planeten' }] })
.then(function (user) {
if (!user) {
res.status(404).send('Er ging helaas iets fout')
} else {
res.status(201).send("Card is toegevoegd");
}
})
hope it helps
Related
I have a ride Collection with trips as a field, trips is a map where the keys are different years. I want to query the collection but exclude the passengers field in each trip
const ride = new Schema(
{
boat_operator: {
type: Schema.Types.ObjectId,
required: true,
ref: 'User'
},
trips: {
type: Map,
of: {
passengers: [{ type: Schema.Types.ObjectId, ref: 'User' }],
available_seats: { type: Number, required: true }
},
default: new Map()
}
}
)
I tried this
const rides = await Ride.find({ status: 'waiting' }).select("-trips.*.passengers")
I tried to select all the items in value then remove the corresponding passengers field in each
It had no effect
this is what the response looks like
[
{
"_id": "632a1669279c86f4ab3a4bf5",
"boat_operator": "6328c434a98212a7f57c4edc",
"trips": {
"2019": {
"passengers": [],
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfe"
},
"2020": {
"passengers": [],
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfc"
},
"2021": {
"passengers": [],
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfa"
},
"2022": {
"passengers": [],
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bf8"
}
}
}
]
I want to exclude the passengers field in the returned document
This would solve it
const rides = await Ride.aggregate([
{ "$match": { "status": "waiting" } },
{ $project: { "trips": { $objectToArray: '$trips' } } },
{ $project: { 'trips.v.passengers': 0 } },
{ $project: { "trips": { $arrayToObject: '$trips' } } }
]);
nodejs javascript mongodb mongoose
Here's the returned document
{
"_id": "632a1669279c86f4ab3a4bf5",
"trips": {
"2019": {
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfe"
},
"2020": {
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfc"
},
"2021": {
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bfa"
},
"2022": {
"available_seats": 5,
"_id": "632a1669279c86f4ab3a4bf8"
}
}
}
I am building an api for a kanban task management app. I have this data stored in the database.
{
"_id": "62fa5aa25778ec97bc6ee231",
"user": "62f0eb5ebebd0f236abcaf9d",
"name": "Marketing Plan",
"columns": [
{
"name": "todo",
"_id": "62fa5aa25778ec97bc6ee233",
"tasks": [
{
"title": "Task Four testing 2",
"description": "This is task four",
"subtasks": [
{
"name": "wash dshes test",
"completed": false,
"_id": "62ff74bfe80b11ade2d34456"
},
{
"name": "do homework",
"completed": false,
"_id": "62ff74bfe80b11ade2d34457"
}
],
"_id": "62ff74bfe80b11ade2d34455"
}
]
},
{
"name": "doing",
"_id": "62fa5aa25778ec97bc6ee234",
"tasks": []
},
{
"name": "done",
"_id": "62fa5aa25778ec97bc6ee235",
"tasks": []
}
],
"__v":0
}
I tried to return a single object with the id of req.params.id which in this case is 62ff74bfe80b11ade2d34455 however, it returns an empty array instead of returning a single object.
const getTask = asyncHandler(async (req, res) => {
const task = await Board.aggregate([
{
$match: {
"columns.tasks._id": req.params.id,
},
},
{
$project: {
columns: {
$first: {
$filter: {
input: "$columns.tasks",
cond: {
$eq: ["$$this._id", req.params.id],
},
},
},
},
},
},
{
$replaceRoot: {
newRoot: "$columns",
},
},
]);
});
As #yung-shun suggested, I needed to cast req.params.id as an Object ID.
const task = await Board.aggregate([
{
$match: {
"columns.tasks._id": new ObjectId(req.params.id),
},
},
{ $unwind: "$columns" },
{
$match: {
"columns.tasks._id": new ObjectId(req.params.id),
},
},
{
$project: {
task: {
$first: {
$filter: {
input: "$columns.tasks",
cond: { $eq: ["$$this._id", new ObjectId(req.params.id)] },
},
},
},
},
},
{ $replaceWith: "$task" },
]);
res.status(200).json(task);
i have the following aggregate function in my code to count how many times a value is found in the db:
let data: any = await this.dataModel.aggregate(
[
{
$match: {
field: new ObjectID(fieldID),
},
},
{
$group: {
_id: "$value",
total_for_value: { $sum: 1 },
},
},
]
);
This works correctly, however my data setup is a bit different. I have two types of value fields. Some like this:
{
"_id" : ObjectId("123"),
"value" : "MALE"
}
and some like this:
{
"_id" : ObjectId("456"),
"value" : {
"value" : "MALE",
}
}
Is there a way to group the ones where the _id and the _id.value are the same? At the moment it counts them separately.
db.collection.aggregate([
{
"$addFields": {
"key2": {
"$cond": {
"if": {
$and: [
{
"$eq": [
{
"$type": "$key"
},
"object"
]
}
]
},
"then": "$key.value",
"else": "$key"
}
}
}
},
{
"$group": {
"_id": "$key2",
"data": {
$push: "$$ROOT"
}
}
}
])
This would do the job if _id.value is an object.
Playground
I have the following document structure
{
"_id": "60b7b7c784bd6c2a1ca57f29",
"user": "607c58578bac8c21acfeeae1",
"exercises": [
{
"executed_reps": [8,7],
"_id": "60b7b7c784bd6c2a1ca57f2a",
"exercise_name": "Push up"
},
{
"executed_reps": [5,5],
"_id": "60b7b7c784bd6c2a1ca57f2b",
"exercise_name": "Pull up"
}
],
}
In aggregation, I am trying to sum all the executed_reps so the end value in this example should be 25 (8+7+5+5).
Here is the code I have so far:
const exerciseStats = await UserWorkout.aggregate([
{
$match: {
user: { $eq: ObjectId(req.query.user) },
},
},
{ $unwind: '$exercises' },
{
$group: {
_id: null,
totalReps: {
$sum: {
$reduce: {
input: '$exercises.executed_reps',
initialValue: '',
in: { $add: '$$this' },
},
},
},
},
},
]);
This gives a result of 5 for totalReps. What am I doing wrong?
Well 10 minutes later I found the solution myself:
UserWorkout.aggregate([
{
$match: {
user: { $eq: ObjectId(req.query.user) },
},
},
{ $unwind: '$exercises' },
{
$project: {
total: { $sum: '$exercises.executed_reps' },
},
},
{
$group: {
_id: null,
totalExercises: { $sum: '$total' },
},
},])
Had to use $project first. :)
You can do it like this:
const exerciseStats = await UserWorkoutaggregate([
{
"$addFields": {
"total": {
"$sum": {
"$map": {
"input": "$exercises",
"as": "exercise",
"in": {
"$sum": "$$exercise.executed_reps"
}
}
}
}
}
}
])
Here is the working example: https://mongoplayground.net/p/5_fsPgSh8EP
I'm stuck on how to update single value in multi nested array documents value with findOneAndUpdate.
My condition goes like this:
Update warehouse amount where the productCode is "abc123", size "41" in warehouse "Hamburg".
I just get back null or bot sizes 41 and 42.
Here is the part of the doc:
{
"_id": ObjectId("xxxx636309f84479ec0c7b"),
"productCode": "abc123",
"brand": "Nike",
"name": "aaa",
"model": "Runner",
"color": "Brown",
"image": "shoe.jpg",
"sizes": [{
"_id": ObjectId("xxxxc636309f84479ec0c7e"),
"size": "41",
"wares": [{
"_id": ObjectId("xxxx2c636309f84479ec0c80"),
"ware": "Hamburg",
"amount": 7
},
{
"_id": ObjectId("5db72c636309f84479ec0c7f"),
"ware": "Berlin",
"amount": 7
}
]
},
{
"_id": ObjectId("5db72c636309f84479ec0c7c"),
"size": "42",
"wares": [{
"_id": ObjectId("5db72c636309f84479ec0c7d"),
"ware": "Hamburg",
"amount": 16
}]
}
],
"__v": 0
}
This is what I've tried:
Product.findOneAndUpdate({
"productCode": "abc123",
"sizes.size": 41,
"sizes.wares.ware": "Hamburg"
}, {
"$set": {
"sizes.0.wares.amount": 99
}
}, {
useFindAndModify: false
},
(err, products) => {
if (err) {
return res.status(422).send(err)
}
return res.json(products)
}
);
How can I solve this?
And to fulfill #ambianBeing, this is how it would be done with findOneAndUpdate:
Product.findOneAndUpdate({
"productCode": "abc123",
"sizes": {
$elemMatch: {
$and: [
{ size: "41" },
{
wares: {
$elemMatch: {
ware: "Hamburg"
}
}
}]
}
}
}, {
$set: {
"sizes.$[theSize].wares.$[theWare].amount": 99
}
}, {
arrayFilters: [{
"theSize.size": "41"
}, {
"theWare.ware": "Hamburg"
}]
})
Can be done using filtered positional operator $[<identifier>] which is nifty in use cases of nested array updation.
Query (Mongo Shell):
db.collection.update(
{ productCode: "abc123" },
{ $set: { "sizes.$[outer].wares.$[inner].amount": 99 } },
{
arrayFilters: [{ "outer.size": "41" }, { "inner.ware": "Hamburg" }],
multi: false
}
);
Query with Mongoose Model:
Product.update(
{ productCode: "abc123" },
{ "sizes.$[outer].wares.$[inner].amount": 99 },
{
arrayFilters: [{ "outer.size": "41" }, { "inner.ware": "Hamburg" }],
multi: false
},
(err, rawDoc) => {
if (err) {
console.error(err);
}
console.info(rawDoc);
}
);