How can i update values in array inside an object in an array.
{
"_id" : ObjectId("63c7ca9584535c160ee4aaed"),
"status" : "REJECTED",
"steps" : [
{
"_id" : ObjectId("63c7ca9884535c160ee4ab03"),
"status" : "REJECTED",
"stepUsers" : [
{
"_id" : ObjectId("63c7ca9884535c160ee4ab04"),
"status" : "REJECTED",
}
]
},
]
}
I tried to update using arrayFilters but that didn't work. Mongo throw an error MongoServerError: Found multiple array filters with the same top-level field name steps
Collection.updateOne({
_id: id
}, {
$set: {
"steps.$[steps].stepUsers.$[stepUsers].status": 'PENDING',
}
}, {
arrayFilters: [
{ "steps._id": step._id },
{ "steps.stepUsers._id": stepUser._id }
]
})
I need to update steps.stepUsers.status in the collection.
Try to change the arrayFilters: "steps.stepUsers._id" -> "stepUsers._id"
since arrayFilters is referencing the string inside the [], not the path to it.
Collection.updateOne({
_id: id
},
{
$set: {
"steps.$[steps].stepUsers.$[stepUsers].status": "PENDING",
}
},
{
arrayFilters: [
{
"steps._id": step._id
},
{
"stepUsers._id": stepUser._id
}
]
})
See how it works on the playground example
Related
I have a object which has dynamic keys all the values in that are numeric integers, i like to update all the key values in that object
{
"_id" : ObjectId("6395fc7b1c5a0c4a5fc9bd8e"),
"users" : [
ObjectId("638da89d0066308efe081709"),
ObjectId("63844feadf507942caaf90e3"),
ObjectId("638455e5fa983e9cf84c0f3f")
],
"type" : "GROUP",
"unReadCount" : {
"638da89d0066308efe081709" : 0,
"63844feadf507942caaf90e3" : 0,
"638455e5fa983e9cf84c0f3f" : 0
},
"createdAt" : ISODate("2022-12-11T21:21:23.815+05:30"),
"updatedAt" : ISODate("2022-12-11T22:48:33.953+05:30"),
"__v" : 0
},
I want to increment the unReadCount entire object values, please note the unReadCount object keys are not static it varies document to document. I tried with normal $inc operator it thrown error stating that has the field 'unReadCount' of non-numeric type object" $ wouldn't work as its not an array.
Please note that am trying to achieve this in MongoDB, i can do this via JS code by fetching the records and looping through it, but i like to do it in MongoDB/Mongoose. Any clue/help is appreciated
I think here is what you need
db.tests.updateMany({},[
{
$addFields: {
unReadCountArray: { $objectToArray: "$unReadCount" }
}
},
{
$addFields: {
unReadCountArray: {
$map: {
input: "$unReadCountArray",
as: "unReadCount",
in:
{
$mergeObjects: [ { k:"$$unReadCount.k", v: {$add: ["$$unReadCount.v", 1] }}, null ]
}
}
}
}
},
{
$addFields: {
unReadCount: {
$arrayToObject: '$unReadCountArray'
}
}
},{
$unset:'unReadCountArray'
},
{ $set: { modified: "$$NOW"} }])
This is my data structure:
{
studentName: 'zzz',
teachers: [
{
teacherName: 'xxx',
feedbacks: []
}, {
teacherName: 'yyy',
feedbacks: []
}
]
}
Now I am trying to code a query to add an 'feedback' object to the 'feedbacks' array that belongs to the teacher named 'yyy'.
await collection.updateOne({
studentName: 'zzz',
teachers: {
$elemMatch: {
teacherName: {
$eq: 'yyy'
}
}
}
}, {
$push: {
'teachers.$.feedbacks': {}
}
})
The query part is faulty somehow. If I change '$' to 0 or 1, then the code works finally. Otherwise, the object cannot be pushed.
This update works fine, adds the string element "Nice work" to the teachers.feedbacks nested array.
db.test.updateOne(
{
studentName: "zzz",
"teachers.teacherName": "yyy"
},
{ $push: { "teachers.$.feedbacks" : "Nice work" } }
)
The $elemMatch syntax is not required, as the query condition for the array elements is for a single field.
The updated document:
{
"studentName" : "zzz",
"teachers" : [
{
"teacherName" : "xxx",
"feedbacks" : [ ]
},
{
"teacherName" : "yyy",
"feedbacks" : [
"Nice work"
]
}
]
}
I am trying to update an embedded document in MongoDB using mongoose in nodejs. The document is simplified and shown below (The names in friendList is assumed to be unique):
{
"_id" : ObjectId("5eb0617f3aec924ff42249cd"),
"friendList" : [
{
"name" : "Alex",
"flag" : false,
},
{
"name" : "Bob",
"flag" : false,
},
{
"name" : "Caleb",
"flag" : true,
},
{
"name" : "Debbie",
"flag" : false,
}
]
}
I would like to update this collection by:
accepting a Patch API with a request body containing a subset of friendList and
update the nested field flag.
For example, if I were to do a patch call from postman with the request body:
{
"friendList":[
{
"name":"Alex",
"flag":true
},
{
"name":"Caleb",
"flag":false
},
{
"name":"Debbie",
"flag":false
}
]
}
then I should expect my document in MongoDB to look like this:
{
"_id" : ObjectId("5eb0617f3aec924ff42249cd"),
"friendList":[
{
"name":"Alex",
"flag":true
},
{
"name":"Bob",
"flag":false
},
{
"name":"Caleb",
"flag":false
},
{
"name":"Debbie",
"flag":false
}
]
}
What I have tried on nodejs is updating the entire request body:
function updateUser(req){
User.findOneAndUpdate({'_id':req.params._id},req.body,{new:true});
}
which replaces the entire friendList array:
{
"_id" : ObjectId("5eb0617f3aec924ff42249cd"),
"friendList":[
{
"name":"Alex",
"flag":true
},
{
"name":"Caleb",
"flag":false
},
{
"name":"Debbie",
"flag":false
}
]
}
I have also tried using array operators like $:
function updateUser(req){
User.findOneAndUpdate(
{'_id':req.params._id},
{$addToSet:{
"friendList":{
$each:req.body.friendList}
}
},
{new:true}
);
}
which gave me the output:
{
"_id" : ObjectId("5eb0617f3aec924ff42249cd"),
"friendList" : [
{
"name" : "Alex",
"flag" : false,
},
{
"name" : "Bob",
"flag" : false,
},
{
"name" : "Caleb",
"flag" : true,
},
{
"name" : "Debbie",
"flag" : false,
},
{
"name" : "Alex",
"flag" : true,
},
{
"name" : "Caleb",
"flag" : false,
},
]
}
which $addToSet considers both name and flag when making a comparison to check if the values exist in the array. It might work if I am able to intercept at this comparison phase such that only the name field is checked.
I have been exploring concepts like $[<identifier>] and arrayFilter but can't seem to make it work.
Simple $addToSet does not work, because your array is not ["Alex","Caleb","Debbie"]. Your array is
[
{name: "Alex", flag: true},
{name: "Caleb", flag: false},
{name: "Debbie", flag: false}
]
Element {name:"Alex", flag: true} is different to element {name: "Alex", flag: false}, that's the reason why your approach failed. I think you have to use aggregation pipeline, e.g. this one:
db.collection.aggregate([
{ $addFields: { newFriends: friendList } },
{
$set: {
friendList: {
$map: {
input: "$friendList",
in: {
name: "$$this.name",
flag: {
$cond: [
{ $eq: [{ $indexOfArray: ["$newFriends.name", "$$this.name"] }, - 1] },
"$$this.flag",
{ $arrayElemAt: [ "$newFriends.flag", { $indexOfArray: ["$newFriends.name", "$$this.name"] } ] }
]
}
}
}
}
}
},
{ $unset: "newFriends" }
])
Or if you like to work with index variable:
db.collection.aggregate([
{ $addFields: { newFriends: friendList } },
{
$set: {
friendList: {
$map: {
input: "$friendList",
in: {
$let: {
vars: { idx: { $indexOfArray: ["$newFriends.name", "$$this.name"] } },
in: {
name: "$$this.name",
flag: {
$cond: [
{ $eq: ["$$idx", - 1] },
"$$this.flag",
{ $arrayElemAt: ["$newFriends.flag", "$$idx"] }
]
}
}
}
}
}
}
}
},
{ $unset: "newFriends" }
])
Note, this will update only existing names. New names are not added to the array, your question is not clear in this regard. If you like to add also new elements then insert
{
$set: {
friendList: { $setUnion: ["$friendList", "$newFriends"] }
}
},
just before { $unset: "newFriends" }
The aggregation pipeline can be used in an update:
User.findOneAndUpdate(
{'_id':req.params._id},
[
{ $addFields: { newFriends: req.body.friendList } },
{
$set: { ...
}
]
);
how to get data in mongoose where last element in array?
I have data looks like this:
[
{
"_id" : ObjectId("5b56eb3deb869312d85a8e69"),
"transactionStatus" : [
{
"status" : "pending",
"createdAt" : ISODate("2018-07-24T09:02:53.347Z")
},
{
"status" : "process",
"createdAt" : ISODate("2018-07-24T09:02:53.347Z")
}
]
},
{
"_id" : ObjectId("5b56eb3deb869312d8589765"),
"transactionStatus" : [
{
"status" : "pending",
"createdAt" : ISODate("2018-07-24T09:02:53.347Z")
},
{
"status" : "process",
"createdAt" : ISODate("2018-07-24T09:03:30.347Z")
},
{
"status" : "done",
"createdAt" : ISODate("2018-07-24T09:04:22.347Z")
}
]
}
]
And, I want to get data above where last object transactionStatus.status = process, so the result should be:
{
"_id" : ObjectId("5b56eb3deb869312d85a8e69"),
"transactionStatus" : [
{
"status" : "pending",
"createdAt" : ISODate("2018-07-24T09:02:53.347Z")
},
{
"status" : "process",
"createdAt" : ISODate("2018-07-24T09:02:53.347Z")
}
]
}
how to do that with mongoose?
You can use $expr (MongoDB 3.6+) inside of match. Using $let and $arrayElemAt passing -1 as second argument you can get the last element as a temporary variable and then you can compare the values:
db.col.aggregate([
{
$match: {
$expr: {
$let: {
vars: { last: { $arrayElemAt: [ "$transactionStatus", -1 ] } },
in: { $eq: [ "$$last.status", "process" ] }
}
}
}
}
])
The same result can be achieved for lower versions of MongoDB using $addFields and $match. You can add $project then to remove that temporary field:
db.col.aggregate([
{
$addFields: {
last: { $arrayElemAt: [ "$transactionStatus", -1 ] }
}
},
{
$match: { "last.status": "process" }
},
{
$project: { last: 0 }
}
])
//Always update new status at Position 0 using $position operator
db.update({
"_id": ObjectId("5b56eb3deb869312d85a8e69")
},
{
"$push": {
"transactionStatus": {
"$each": [
{
"status": "process",
"createdAt": ISODate("2018-07-24T09:02:53.347Z")
}
],
"$position": 0
}
}
}
)
//Your Query for checking first element status is process
db.find(
{
"transactionStatus.0.status": "process"
}
)
refer $position, $each
Here is my User Schema
{
"user_collection":[
{
"_id":"xxx",
"name":"NAME",
"prescription":
{
"doctor_id":
[{
"_id":"xxx",
"medicine_id":"MEDICINE_ID",
}]
},
"meal":{
"meal_name":{
"start_time":"START_TIME",
"end_time":"END_TIME"
}
},
"created_at":"CREATED_AT",
"updted_at":"UPDATED_AT"
}
]
}
Note : _id given just for understanding
I need to insert document inside the prescription array. Here is the condition
If the new doctor_id is given, it should add in the prescription array like
{
"_id" : ObjectId("5813288eaa0f1231de477d92"),
"name" : "andrew",
"prescription" : [
{
"prescription" : [
{
"_id" : ObjectId("58143d484e26a229873b0528"),
"medicine_id" : "10011241343"
}
],
"_id" : ObjectId("58143d484e26a229873b0527"),
"doctor_id" : "5813221ace684e2b3f5f0a6d"
}
]
}
And if i given the doctor_id that already exists it should add like
{
"_id" : ObjectId("5813288eaa0f1231de477d92"),
"name" : "andrew",
"prescription" : [
{
"prescription" : [
{
"_id" : ObjectId("58143d484e26a229873b0528"),
"medicine_id" : "10011241343"
}
],
"prescription" : [
{
"_id" : ObjectId("58143d484e26a229873b0529"),
"medicine_id" : "10011241349"
}
],
"_id" : ObjectId("58143d484e26a229873b0527"),
"doctor_id" : "5813221ace684e2b3f5f0a6d"
}
]
}
What i have tried is
dbModel.user.update({
_id: req.body.user_id
}, {
$set: {
prescription: [ { "doctor_id" : req.body.doctor_id, "prescription" : [
{
"medicine_id" : req.body.medicine_id
}]} ],
}
}, {
upsert: true
}, function(err) {
if (err) {
res.status(202).json({
"success": "0",
"message": err
})
} else {
res.status(200).json({
"success": "1",
"message": "Prescription given successfully"
});
}
})
I don't know how to check whether the doctor_id already exists and if it does not exists it should add a new array, and if it exists it should add inside the existing arrays
Take a look in this answer.
But basically you can use the $ operator which identifies an element in an array.
You can see here some mongodb array operators.