i want to search into an embed document in mongodb and return only what i'm looking for.
Here's the document:
"_id" : "yH8HmCPz6H6E8Hinq",
"between" : [
"4bgdLrztpqgwAkZP4",
"9jZhXHjAkoY7mmX7B"
],
"messages" : [
{
"content" : "fdsqf",
"user" : "4bgdLrztpqgwAkZP4",
"created_at" : ISODate("2016-11-17T23:13:59.659Z"),
"isSeen" : false,
"sender" : "John doe",
"receiver" : "Elen doe"
},
{
"content" : "test",
"user" : "9jZhXHjAkoY7mmX7B",
"created_at" : ISODate("2016-11-20T11:42:42.893Z"),
"isSeen" : false,
"sender" : "Elen doe",
"receiver" : "John doe"
}
]
All what i want to have is "messages.isSeen" equals to false and receiver isn't Meteor.user().username.
And finally how to update that field to become true.
Hope someone can help ! Thanks in advance !
You need to include the _id in the query and $set in the update.
let id = "yH8HmCPz6H6E8Hinq";
let username = Meteor.user().username;
let query = { _id: id, messages: { $elemMatch: { isSeen: false, receiver: { $ne: username }}}};
Chat.update(query,{ $set: { "messages.$.isSeen": true }});
You need something like:
Chat.update({
'messages.isSeen': false, // isSeen is false
'messages.receiver': { // Receiver is
$ne: Meteor.user().username // not equal to Meteor.user().username
}
}, {
'messages.$isSeen': true // Set isSeen to true
});
Related
I have a Meteor Mongo document as shown below
{
"_id" : "zFndWBZTvZPgSKXHP",
"activityId" : "aRDABihAYFoAW7jbC",
"activityTitle" : "Test Mongo Document",
"users" : [
{
"id" : "b1#gmail.com",
"type" : "free"
},
{
"id" : "JqKvymryNaCjjKrAR",
"type" : "free"
},
],
}
I want to update a specific array element's email with custom generated id using Meteor query something like the below.
for instance, I want to update the document
if 'users.id' == "b1#gmail.com" then update it to users.id = 'SomeIDXXX'
So updated document should looks like below.
{
"_id" : "zFndWBZTvZPgSKXHP",
"activityId" : "aRDABihAYFoAW7jbC",
"activityTitle" : "Test Mongo Document",
"users" : [
{
"id" : "SomeIDXXX",
"type" : "free"
},
{
"id" : "JqKvymryNaCjjKrAR",
"type" : "free"
},
],
}
I have tried the below but didnt work.
Divisions.update(
{ activityId: activityId, "users.id": emailId },
{ $set: { "users": { id: _id } } }
);
Can someone help me with the relevant Meteor query ? Thanks !
Your query is actually almost right except for a small part where we want to identify the element to be updated by its index.
Divisions.update({
"activityId": "aRDABihAYFoAW7jbC",
"users.id": "b1#gmail.com"
}, {
$set: {"users.$.id": "b2#gmail.com"}
})
You might need the arrayFilters option.
Divisions.update(
{ activityId: activityId },
{ $set: { "users.$[elem].id": "SomeIDXXX" } },
{ arrayFilters: [ { "elem.id": "b1#gmail.com" } ], multi: true }
);
https://docs.mongodb.com/manual/reference/operator/update/positional-filtered/
You need to use the $push operator instead of $set.
{ $push: { <field1>: <value1>, ... } }
I want to update all the collection field profile.email with emails.[0].address just something like this in SQL:
update dbo.users
set profile.email=emials.[0].address
I know this stupid code won't work on SQL either. Just put it to make it sensible for what I need.
it is something like this,but is not working:
db.getCollection('users').update(
{_id: "QYoHQkTuTXnEC6Pws"},
{$set:
{'profile.email': db.getCollection('users').aggregate({$match: {_id:'QYoHQkTuTXnEC6Pws'}},
{$project: {_id:0,email: {$arrayElemAt:
['$emails.address',0]}}})
}
}
)
the result is not true :
"email" : {
"_batch" : [
{
"email" : "deleted_sadaf#ham.com"
}
],
"_useReadCommands" : true,
"_cursorid" : NumberLong(0),
"_batchSize" : undefined,
"_ns" : "meteor.users",
"_db" : {
"_mongo" : {
"slaveOk" : true,
"host" : "localhost:3001",
"defaultDB" : "",
"_readMode" : "commands",
"_writeMode" : "commands"
},
"_name" : "meteor"
},
"_collName" : "users",
"_cursorHandle" : {}
}
You have to iterate over each document and update to achieve expected result.
db.users.find({}).forEach(function (user) {
db.users.update({_id: user._id}, {$set: {'profile.email': user.emails[0].address}});
});
db.users.update({_id: "doc id"},
{$set: {'profile.email': db.users.find({_id: "doc id"}).emails[0].address}
})
Your task has 2 steps:
1. get the email address, which is performed by "db.users.find"
2. update the document, which is performed by "db.users.update"
I have a number of documents in my database where I am applying document validation. All of these documents may have embedded documents. I can apply simple validation along the lines of SQL non NULL checks (these are essentially enforcing the primary key constraints) but what I would like to do is apply some sort of conditional validation to the optional arrays and embedded documents. By example, lets say I have a document that looks like this:
{
"date": <<insertion date>>,
"name" : <<the portfolio name>>,
"assets" : << amount of money we have to trade with>>
}
Clearly I can put validation on this document to ensure that date name and assets all exist at insertion time. Lets say, however, that I'm managing a stock portfolio and the document can have future updates to show an array of stocks like this:
{
"date" : <<insertion date>>,
"name" : <<the portfolio name>>,
"assets" : << amount of money we have to trade with>>
"portfolio" : [
{ "stockName" : "IBM",
"pricePaid" : 155.39,
"sharesHeld" : 100
},
{ "stockName" : "Microsoft",
"pricePaid" : 57.22,
"sharesHeld" : 250
}
]
}
Is it possible to to apply a conditional validation to this array of sub documents? It's valid for the portfolio to not be there but if it is each document in the array must contain the three fields "stockName", "pricePaid" and "sharesHeld".
MongoShell
db.createCollection("collectionname",
{
validator: {
$or: [
{
"portfolio": {
$exists: false
}
},
{
$and: [
{
"portfolio": {
$exists: true
}
},
{
"portfolio.stockName": {
$type: "string",
$exists: true
}
},
{
"portfolio.pricePaid": {
$type: "double",
$exists: true
}
},
{
"portfolio.sharesHeld": {
$type: "double",
$exists: true
}
}
]
}
]
}
})
With this above validation in place you can insert documents with or without portfolio.
After executing the validator in shell, then you can insert data of following
db.collectionname.insert({
"_id" : ObjectId("58061aac8812662c9ae1b479"),
"date" : ISODate("2016-10-18T12:50:52.372Z"),
"name" : "B",
"assets" : 200
})
db.collectionname.insert({
"_id" : ObjectId("58061ab48812662c9ae1b47a"),
"date" : ISODate("2016-10-18T12:51:00.747Z"),
"name" : "A",
"assets" : 100,
"portfolio" : [
{
"stockName" : "Microsoft",
"pricePaid" : 57.22,
"sharesHeld" : 250
}
]
})
If we try to insert a document like this
db.collectionname.insert({
"date" : new Date(),
"name" : "A",
"assets" : 100,
"portfolio" : [
{ "stockName" : "IBM",
"sharesHeld" : 100
}
]
})
then we will get the below error message
WriteResult({
"nInserted" : 0,
"writeError" : {
"code" : 121,
"errmsg" : "Document failed validation"
}
})
Using Mongoose
Yes it can be done, Based on your scenario you may need to initialize the parent and the child schema.
Shown below would be a sample of child(portfolio) schema in mongoose.
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var portfolioSchema = new Schema({
"stockName" : { type : String, required : true },
"pricePaid" : { type : Number, required : true },
"sharesHeld" : { type : Number, required : true },
}
References:
http://mongoosejs.com/docs/guide.html
http://mongoosejs.com/docs/subdocs.html
Can I require an attribute to be set in a mongodb collection? (not null)
Hope it Helps!
I have the next document in a collection:
{
"_id" : ObjectId("546a7a0f44aee82db8469f6d"),
...
"valoresVariablesIterativas" : [
{
"asignaturaVO" : {
"_id" : ObjectId("546a389c44aee54fc83112e9")
},
"valoresEstaticos" : {
"IT_VAR3" : "",
"IT_VAR1" : "",
"IT_VAR2" : "asdasd"
},
"valoresPreestablecidos" : {
"IT_ASIGNATURA" : "Matemáticas",
"IT_NOTA_DEFINITIVA_ASIGNATURA" : ""
}
},
{
"asignaturaVO" : {
"_id" : ObjectId("546a3d8d44aee54fc83112fa")
},
"valoresEstaticos" : {
"IT_VAR3" : "",
"IT_VAR1" : "",
"IT_VAR2" : ""
},
"valoresPreestablecidos" : {
"IT_ASIGNATURA" : "Español",
"IT_NOTA_DEFINITIVA_ASIGNATURA" : ""
}
}
]
...
}
I want modify an element of the valoresEstaticos, I know the fields "_id", "asignaturaVO", and the key of the item valoresEstaticos that I want modify.
Which is the correct query for this?, I have this:
db.myCollection.findAndModify({
query:{"_id" : ObjectId("546a7a0f44aee82db8469f6d")},
update: {
{valoresVariablesIterativas.asignaturaVO._id: ObjectId("546a389c44aee54fc83112e9")},
{ $set: {}}
}
})
but I dont know how to build a query :(
Help me please, Thank you very much!
You can just use update.
db.myCollection.update(
{ "_id" : ObjectId("546a7a0f44aee82db8469f6d"), "valoresVariablesIterativas.asignaturaVO._id" : ObjectId("546a389c44aee54fc83112e9") },
{ "$set" : { "valoresVariablesIterativas.$.valoresEstaticos.IT_VAR3" : 99 } }
)
assuming you want to update key IT_VAR3. The key is the positional update operator $. The condition on the array in the query portion of the update is redundant for finding the document, but necessary to use the $ to update the correct array element.
Similar to this question
Barrowing the data set, I have something similar to this:
{
'user_id':'{1231mjnD-32JIjn-3213}',
'name':'John',
'campaigns':
[
{
'campaign_id':3221,
'start_date':'12-01-2012',
},
{
'campaign_id':3222,
'start_date':'13-01-2012',
}
]
}
And I want to add a new key in the campaigns like so:
{
'user_id':'{1231mjnD-32JIjn-3213}',
'name':'John',
'campaigns':
[
{
'campaign_id':3221,
'start_date':'12-01-2012',
'worker_id': '00000'
},
{
'campaign_id':3222,
'start_date':'13-01-2012',
'worker_id': '00000'
}
]
}
How to insert/update a new key into an array of objects?
I want to add a new key into every object inside the array with a default value of 00000.
I have tried:
db.test.update({}, {$set: {'campaigns.worker_id': 00000}}, true, true)
db.test.update({}, {$set: {campaigns: {worker_id': 00000}}}, true, true)
Any suggestions?
I'm supposing that this operation will occur once, so you can use a script to handle it:
var docs = db.test.find();
for(var i in docs) {
var document = docs[i];
for(var j in document.campaigns) {
var campaign = document.campaigns[j];
campaign.worker_id = '00000';
}
db.test.save(document);
}
The script will iterate over all documents in your collection then over all campaigns in each document, setting the *worker_id* property.
At the end, each document is persisted.
db.test.update({}, {$set: {'campaigns.0.worker_id': 00000}}, true, true
this will update 0 element.
if you want to add a new key into every object inside the array you should use:
$unwind
example:
{
title : "this is my title" ,
author : "bob" ,
posted : new Date() ,
pageViews : 5 ,
tags : [ "fun" , "good" , "fun" ] ,
comments : [
{ author :"joe" , text : "this is cool" } ,
{ author :"sam" , text : "this is bad" }
],
other : { foo : 5 }
}
unwinding tags
db.article.aggregate(
{ $project : {
author : 1 ,
title : 1 ,
tags : 1
}},
{ $unwind : "$tags" }
);
result:
{
"result" : [
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
"title" : "this is my title",
"author" : "bob",
"tags" : "fun"
},
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
"title" : "this is my title",
"author" : "bob",
"tags" : "good"
},
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
"title" : "this is my title",
"author" : "bob",
"tags" : "fun"
}
],
"OK" : 1
}
After you could write simple updaiting query.