mongodb-query

I'm trying to use a mongodb aggregation query to join($lookup) two collections and then distinct count all the unique values in the joined array. *Note: I don't necessarily know what fields(keys) are in the metaDataMap array. And I don't want to count or include fields that might or might not exist in the Map. So that's why the aggregation query looks like it does. So my two collections look like this: events- { "_id" : "1", "name" : "event1", "objectsIds" : [ "1", "2", "3" ], } Objects { "_id" : "1", "name" : "object1", "metaDataMap" : { "SOURCE" : ["ABC", "DEF"], "DESTINATION" : ["XYZ", "PDQ

I have the following document type { "_id" : "-fA2845ORqeyMUItKXfqZw", "user" : "553247ffdc8a4ade4bb09c5e", "state" : 2, "metadata" : { "language" : "en-US" }, "pipeline" : { "api" : "http://localhost:4000", "provider" : 0 }, "ingest" : { "mimetype" : "audio/mpeg", "size" : 92794268, "client" : "computer", "isWriteable" : true }, "assembly" : { "ok" : "ASSEMBLY_EXECUTING", "message" : "The assembly is currently being executed.", "assembly_id" : "23f29680b32911e59d48f358b85e112d", "parent_id" : null, "template_id" : null, "bytes_received" : 1265, "bytes_expected" : null, "upload_duration" : 0

I have my ISODate in mongo as ISODate and I want to just that in string format with a specific datetime format. Here is the ISODate: ISODate("2020-04-24T11:41:47.280Z") Expected Result: "2020-04-24T11:41:47.280Z" I want this to be happened on mongodb only as many of my services are expecting in this format, and I don't want to make changes in all services as its a tedious job. I got the expected result while i was trying the following. ISODate("2020-04-24T11:41:47.280Z").toJSON() This will give me back the string "2020-04-24T11:41:47.280Z" perhaps simply convert a date into string? this has

I'm trying to remove an element from an array using Java and haven't been successful... I have a "emailsInApp" collection and inside I have this: { "_id" : "750afe", "list" : [ "John@gmail.com", "Mike@gmail.com" ] } { "_id" : "711850", "list" : [ "example@gmail.com" ] } It holds for each id the registered emails. What I would like to do is: given an id and an email, remove that email from that appId. This is what I have atm and when I run it it doesn't change the array at all: DBCollection emailsApp = db.getCollection(EmailsInAppColl); BasicDBObject queryEmail = new BasicDBObject(); queryEmail

Consider the following code, which I am using to fetch the data from my local MongoDB server. var Db = require('mongodb').Db, MongoClient = require('mongodb').MongoClient, Server = require('mongodb').Server, ReplSetServers = require('mongodb').ReplSetServers, ObjectID = require('mongodb').ObjectID, Binary = require('mongodb').Binary, GridStore = require('mongodb').GridStore, Code = require('mongodb').Code, BSON = require('mongodb').pure().BSON, assert = require('assert'); var db = new Db('test', new Server('localhost', 27017)); db.open(function(err, db) { db.createCollection('simple_limit_skip