My document is { _id: 1, age: "young", hobby: [ { vehicle: "car", velocity: "fast" }, { vehicle: "motorcycle", velocity: "fast" } ] } My goal is: when age became old, first hobby became "slow" but others remain "fast" My code is: mongoTemplate.updateFirst( Query.query(where("_id").is("1")), Update.update("age", "old") .set("hobby.$[elem].velocity", "slow") .filterArray(Criteria.where("elem").is(0)), "collection name") But it does not… Read More How to update first element in array object

I’ve to store employee(considering 50 millions records for future) data for each company(let’s say more than 1000 companies) what approach I should follow. #1- Should I use single collection for user’s info? #2- Should I use multiple collection on the basis of states of country(I’m thinking to create separate collection for each state of the… Read More Store employee info in mongo DB for entire country(considering more than 50 millions records)

I am grabbing data from a MongoDB database and converting it into a Pandas dataframe for additional operations to be done later. The MongoDB database contains a bunch of time-based entries and due to how they are stored, each sample for each channel is its own document. Some of these channels always sample at the… Read More How to set new index for Pandas dataframe from existing column that has duplicates?

For instance, I have this JSON inject { "insert": "2023-12-08T09:49:00" } It is String I have sent this query here db.example.find({ "insert" : { "$gt" : "2023-12-08T09:48:00.000Z", "$lt" : "2023-12-08T10:23:38" } }) How is possible that it works? I couldn’t find any implicit conversion between String to UTCdate in docs. I know this field must… Read More Why this query works in MongoDB?

Profile.jsx const Profile = () => { const [auth, setAuth] = useAuth() const [name, setName] = useState("") const [email, setEmail] = useState(""); const [password, setPassword] = useState(""); const [phone, setPhone] = useState(""); const [address, setAddress] = useState(""); const [photo, setPhoto] = useState("") const navigate = useNavigate() console.log(photo.path) useEffect(() => { const { name, email, phone,… Read More The image cannot be displayed after posting a new form data

I’m trying to update a value for MongoDB using NodeJS this is my code: Controller.js updateProduct: async (req, res) => { try { const { params: { id } } = req; const { body } = req; if (!body || Object.keys(body).length === 0) { Response.ERROR(res, new createError.BadRequest()); } else { let product = await… Read More How to update a document in mongodb with NodeJS

This is my Database schema: This is retrieving the reviews sorted by creation date desc and is working: db.films.findOne( { _id: ObjectId("64d69473da87c0c91ae7c596") }, { title: 1, reviews: { $sortArray: { input: "$reviews", sortBy: { creationdate: -1 } }, }, } ); I tried a test here with concatenating 2 arrays from the Database and it’s… Read More How to concatenate a derived array

Before you downvote me to oblivion please read the rest of the details: I would like to load data dynamically to html elements using data from mongoDb, I am running node.js on the backed, and would like to know the best practices when it comes to load the data, are there any premade-workflows that will… Read More How to load data dynamically into a html div from a mongoDb server using node.js

I was going through the source code of Spring-MongoDB project. Here https://github.com/spring-projects/spring-data-mongodb/blob/main/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/TypedAggregation.java I found a Type called Class like below private final Class<I> inputType; I became curious as to what is this Class type , I looked up if there is any keyword of java which pertains to any Type Class, I haven’t found any,… Read More Class type in java -spring mongodb source code

I have something I cant find a solution for … Let me explain in in short: Step 1. Create a new collection in document A Step 2. Use this id and create a new collection in document B Step 3. Update collection from step 1 with the id from step2 In nodejs: DocumentA.create({something}) .then((result)=>{ DocumentB.create({x… Read More Updating document with id from other action using previous id (nodejs & mongodb)