I have a mongo DB with that kind of objects:
{
"_id" : ObjectId("5d67e5b75f99ee4d8c996624"),
"metadata" : {
"ownerEmail" : "test#test.com",
"firmwareVersion" : "01",
"hardwareId" : "00001"
},
"serialnumber" : "automate01",
}
In javascript, i use that kind of call to get all the objects of the collections, and that works:
getAll(): Promise<Automate[]> {
return this.database
.collection('automates')
.find({})
.toArray();
}
but when i want to select object by 'ownerEmail' i write something like:
getAllByUser(email: string): Promise<Automate[]> {
return (
this.database
.collection('automates')
.find({
metadata: {
ownerEmail: email
}
})
.toArray()
);
}
This return nothing... so, what am i doing wrong. I read this:https://docs.mongodb.com/manual/tutorial/query-embedded-documents/
And... i did the same as described. Any help ?
You are using object so it is simple to write
getAllByUser(email: string): Promise<Automate[]> {
return (
this.database
.collection('automates')
.find({ "metadata.ownerEmail": email })
.toArray()
);
}
But if you are using array of object or array of array then you need to use $elemMatch
Like this type of data
{
"_id" : ObjectId("XXXXXXXXXXXXXXXXXXX"),
"metadata" : [
{
"ownerEmail" : "test#test.com",
"firmwareVersion" : "01",
"hardwareId" : "00001"
}
],
"serialnumber" : "automate01"
}
which become
.find({ "metadata" :{ $elemMatch : { "ownerEmail": "test#test.com" }}})
Related
I'm updating the age and name of a character with a specific _id from an array of characters that is inside a document of model Drama.
The document I'm working with:-
{
"_id" : ObjectId("619d44d2ec2ca20ca0404b5a"),
"characters" : [
{
"_id" : ObjectId("619fdac5a03c8b10d0b8b13c"),
"age" : "23",
"name" : "Vinay",
},
{
"_id" : ObjectId("619fe1d53810a130207a409d"),
"age" : "25",
"name" : "Raghu",
},
{
"_id" : ObjectId("619fe1d53810a130207a502v"),
"age" : "27",
"name" : "Teju",
}
],
}
So to update the character Raghu I did this:-
const characterObj = {
age: "26",
name: "Dr. Raghu",
};
Drama.updateOne(
{ _id: req.drama._id, "characters._id": characterId },
{
$set: {
"characters.$": characterObj,
},
},
function(err, foundlist) {
if (err) {
console.log(err);
} else {
console.log("Update completed");
}
}
);
// req.drama._id is ObjectId("619d44d2ec2ca20ca0404b5a")
// characterId is ObjectId("619fe1d53810a130207a409d")
This updated the character but it also assigned a new ObjectId to the _id field of the character. So, I'm looking for ways on how to prevent the _id update.
Also, I know I can set the individual fields of character instead of assigning a whole new object to prevent that but it will be very tedious if my character's object has a lot of fields.
//Not looking to do it this way
$set: {
"characters.$.age": characterObj.age,
"characters.$.name": characterObj.name,
},
Thanks.
I found something here, just pre define a schema (a blueprint in a way) that affects the id
var subSchema = mongoose.Schema({
//your subschema content
},{ _id : false });
Stop Mongoose from creating _id property for sub-document array items
Or I would say, when you create a character assign it a custom id from the start, that way it will retain that id throughout.
I'm leaving this question open as I would still like to see a simpler approach. But for now, I did find one easy alternative solution for this issue which I'm will be using for some time now until I find a more direct approach.
In short - Deep merge the new object in the old object using lodash and then use the new merged object to set field value.
For example, let's update the character Raghu from my question document:-
First install lodash(Required for deep merging objects) using npm:
$ npm i -g npm
$ npm i --save lodash
Import lodash:
const _ = require("lodash");
Now update the character Raghu like this:-
const newCharacterObj = {
age: "26",
name: "Dr. Raghu",
};
Drama.findById(
{ _id: req.drama._id, "characters._id": characterId },
"characters.$",
function(err, dramaDocWithSpecificCharacter) {
console.log(dramaDocWithSpecificCharacter);
// ↓↓↓ console would log ↓↓↓
// {
// "_id" : ObjectId("619d44d2ec2ca20ca0404b5a"),
// "characters" : [
// {
// "_id" : ObjectId("619fe1d53810a130207a409d"),
// "age" : "25",
// "name" : "Raghu",
// }
// ],
// }
const oldCharacterObj = dramaDocWithSpecificCharacter.characters[0];
const mergedCharacterObjs = _.merge(oldCharacterObj, newCharacterObj);
// _.merge() returns a deep merged object
console.log(mergedCharacterObjs);
// ↓↓↓ console would log ↓↓↓
// {
// _id: 619fe1d53810a130207a409d,
// age: "26",
// name: "Dr. Raghu",
// };
Drama.updateOne(
{ _id: req.drama._id, "characters._id": characterId },
{
$set: {
"characters.$": mergedCharacterObjs,
},
},
function(err, foundlist) {
if (err) {
console.log(err);
} else {
console.log("Update completed");
}
}
);
}
);
// req.drama._id is ObjectId("619d44d2ec2ca20ca0404b5a")
// characterId is ObjectId("619fe1d53810a130207a409d")
Note: We can also use the native Object.assign() or … (spread operator) to merge objects but the downside of it is that it doesn’t merge nested objects which could cause issues if you later decide to add nested objects without making changes for deep merge.
You can pass your payload or request body like this if we provide _id it will prevent update to nested document
"characters" : [
{
"_id" : "619fdac5a03c8b10d0b8b13c",
"age" : "updated value",
"name" : "updated value",
}, {
"_id" : "619fe1d53810a130207a409d",
"age" : "updated value",
"name" : "updated value",
}, {
"_id" : "619fe1d53810a130207a502v",
"age" : "updated value",
"name" : "updated value",
}
],
It works for me for bulk update in array object
I have an object user that looks like that
{
"_id" : ObjectId("5edbdf57ac52325464b054ec"),
...
"purchaseHistory" : [
{
"_id" : ObjectId("5ee7a8f6b438a1254cec3f74"),
...
},
{
"_id" : ObjectId("5ee7a8f6b438a1254cec3f88"),
...
}
]
}
What I wanna do is to add a new field to a specific object inside "purchaseHistory" by ID, for example I wanna add to "5ee7a8f6b438a1254cec3f88" a field "status": 0
What I tried is
users.findOneAndUpdate(
{
_id: ObjectId(userId),
'purchaseHistory._id': ObjectId(saleId)
},
{
$set: { 'purchaseHistory.$.status': status}
}
)
But it gives me an error, how can I do it properly?
According to the website provided by D. SM, I was able to do it this way
users.findOneAndUpdate(
{
'_id': ObjectId(userId),
'purchaseHistory._id': ObjectId(saleId)
},
{
$set: { 'purchaseHistory.$.status': status }
}
)
MongoDB provides the positional update operator for cases like this.
I am using Azure cosmos db with the Mongodb API. Also i am using mongoose to create schemas and create new documents in the database. I am also using Node.js.
At this point I am considering using a One-to-Many relationship with embedded documents.
The data structure is like this :
{
"_id" : "locality1",
"_type" : "Locality",
"name" : "Wallmart",
"subsectionList" : [
{
"_id" : "subsection1",
"_type" : "SubSection",
"name" : "First floor",
"sensorList" : [
{
"_id" : "sensor1",
"_type" : "Sensor",
"placement" : "In the hallway"
},
{
"_id" : "sensor2",
"_type" : "Sensor",
"placement" : "In the ceiling"
}
]
},
{
"_id" : "subsection2",
"_type" : "SubSection",
"name" : "Second floor",
"sensorList" : [ ],
}
],
}
I want to retrieve ONLY the "sensor1"-object, not anything from the parent.
Using querying i am only able to retrieve the entire "locality1"-object, with all its underlying subsections and sensors. On a larger scale that is an unnecessary large amount of data.
Here is my query so far.
Locality.find().where('subsectionList.sensorList._id').equals("sensor1").then(doc => {
console.log(doc)
})
I appreciate any tips! :)
Based on my test, i can't get rid of the _id property anyway even though i followed the parameters which is mentioned here.
Locality.find({},'subsectionList', function (err, locas)
The above query still return the results including _id property.(It seems a default item)
I get a workaround from this blog that you could loop the array to filter your desired columns.
var mongoose = require('mongoose');
var COSMOSDB_CONNSTR= "mongodb://***.documents.azure.com:10255/db";
var COSMODDB_USER= "***";
var COSMOSDB_PASSWORD= "***";
mongoose.connect(COSMOSDB_CONNSTR+"?ssl=true&replicaSet=globaldb", {
auth: {
user: COSMODDB_USER,
password: COSMOSDB_PASSWORD
}
}).then(() => console.log('Connection to CosmosDB successful'))
.catch((err) => console.error(err));
const Locality = mongoose.model('Locality', new mongoose.Schema({
_id: String,
subsectionList: [{
sensorList: [{
_id: String,
_type: String,
placement: String
}]
}]
}));
Locality.find({},'subsectionList', function (err, locas) {
if (err) return handleError(err);
var returnArray = [];
for(var i = 0; i<locas.length;i++){
for(var j = 0; j<locas[i].subsectionList.length;j++){
for(var k = 0; k<locas[i].subsectionList[j].sensorList.length;k++){
if(locas[i].subsectionList[j].sensorList[k]._id == 'sensor1')
returnArray.push(locas[i].subsectionList[j].sensorList[k]);
}
}
}
console.log(returnArray);
});
In this data in mongodb i want to update user by _id.
{
"_id" : ObjectId("aaaab51b080ddbaaaa2db6da"),
"user" : "1111",
}
{
"_id" : ObjectId("aaaab564ef9aaaa640adf2a9"),
"user" : "2222"
}
But i want this output:
{
"_id" : ObjectId("aaaab51b080ddbaaaa2db6da"),
"user" : "1111",
}
{
"_id" : ObjectId("aaaab564ef9aaaa640adf2a9"),
"user" : "2222Helooword" //user + "Helooword"
}
I mean user +"Helooword". I want append "Helooword" to user.
I use this code but it dose not work.
I want to use ONE query .(findOneAndUpdate)
var ObjectID = require('mongodb').ObjectID;
var o_id = new ObjectID("aaaab564ef9aaaa640adf2a9");
array.findOneAndUpdate
(
{ '_id' : o_id },
{$set:{ user:['$user','Helooword']}}, //output:"user":"$user,heeeeeeeeo",
function (error, success)
{
if (error) console.log(error);
if(success == null )
console.log("nullllllllllllllllllllllll");
console.log(success);
}
);
For now, the answer is you can't do this in a findOneAndUpdate.
See this question for other options/ideas.
I have data in mongodb like this:
{
"_id" : ObjectId("55a12bf6ea1956ef37fe4247"),
"tempat_lahir" : "Paris",
"tanggal_lahir" : ISODate("1985-07-10T17:00:00.000Z"),
"gender" : true,
"family" : [
{
"nama" : "Robert Deniro",
"tempat_lahir" : "Bandung",
"tanggal_lahir" : ISODate("2015-07-09T17:00:00.000Z"),
"pekerjaan" : "IRT",
"hubungan" : "XXX",
"tanggungan" : false,
"_id" : ObjectId("55a180f398c9925299cb6e90"),
"meta" : {
"created_at" : ISODate("2015-07-11T20:59:25.242Z"),
"created_ip" : "127.0.0.1",
"modified_at" : ISODate("2015-07-12T15:54:39.682Z"),
"modified_ip" : "127.0.0.1"
}
},
{
"nama" : "Josh Groban",
"tempat_lahir" : "Jakarta",
"tanggal_lahir" : ISODate("2015-06-30T17:00:00.000Z"),
"pekerjaan" : "Balita",
"hubungan" : "Lain-Lain",
"tanggungan" : true,
"_id" : ObjectId("55a29293c65b144716ca65b2"),
"meta" : {
"created_at" : ISODate("2015-07-12T16:15:15.675Z"),
"created_ip" : "127.0.0.1"
}
}
]
}
when i try to find data in sub-document, with this code:
person.findOne({ _id: req.params.person, {'family.nama': new RegExp('robert', 'gi') }}, function(err, data){
// render code here
});
It show all data in Family Data,
Can we fetch or display a data only match with criteria/keyword, for example only "Robert Deniro" row
Thank You
In 'regular' MongoDB, you can use the $ operator for that. I'm not sure if it works with Mongoose, but it's worth a try:
person.findOne({
_id : req.params.person,
'family.nama' : new RegExp('robert', 'gi')
}, {
// Only include the subdocument(s) that matched the query.
'family.$' : 1
}, function(err, data){
// render code here
});
If you need any of the properties from the parent document (tempat_lahir, tanggal_lahir or gender; _id will always be included), you need to add them to the projection object explicitly.
One caveat: the $ operator will only return the first matching document from the array. If you need it to return multiple documents, you can't use this method and (AFAIK) have to postprocess the results after they are returned from the database.
It solved with this code:
var options = {
family: {
$elemMatch: { nama: req.query.keyword }
},
};
person.findOne({ _id: req.params.person, 'family.nama': keyword }, options, function(err, data){
//render code here
});
Thanks to #hassansin & #robertklep