mongoose Questions

Mongodb – Unable to get document using document.findOne()

January 7, 2023
Manoj Bhat
2 Answers

I tried to get a document using document.findOne() but it's value is showing undefined . Here is my code `app.post("/studentlogin",(req,res)=> { let password; console.log("login page"); bcrypt.hash(req.body.password,saltRounds,(err,hash)=> { const user= Student.findOne({srno:req.body.srno}); console.log(user.srno); if(req.body.srno==user.srno && hash==user.password) { session=req.username; session.userid=req.body.srno; res.redirect("/"); } else{…

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Mongodb – TypeError: Cannot read properties of undefined (reading 'length') when using mongoose

January 7, 2023
tunji
3 Answers

i'm making a todolist (angela yu), i'm trying to write to a new database, but i keep getting error.this is the error: C:UserstunjiDesktopwebdevtodolist-v2-starting-filesnode_modulesmongooselibmodel.js:3519 for (let i = 0; i < error.writeErrors.length; ++i) { ^ TypeError: Cannot read properties of undefined…

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Mongodb – why do i get an error when i try to use my models?

January 6, 2023
Rip Rip
3 Answers

I'm developing a NextJS app with Mongoose. And I get a "Cannot read properties of null (reading 'get')" error when I try to use my models from Mongoose. Here is a screenshot of the error: I've checked that I've imported…

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MongoDB/Mongoose : CastError in updateMany $inc

January 6, 2023
Cinc-B
2 Answers

My MongoDB schema (simplified): user: ObjectID calories: Number meals:[{ calories: Number name:String }] And I have a updateMany query: await Meals.updateMany( { user: user, 'meals.name': extraMealName }, { $inc: { calories: 'meals.$.calories' } }, {multi : true}, function(error, result) {…

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getting weird mongodb object on client

January 6, 2023
Jeluxe
2 Answers

well as i mentioned in the title when i'm sending message through socket to the server then save it in database mongodb with mongoose, then i returned the the message and send it back in the socket, now when i…

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Mongodb – NOT WORKING: Mongoose findByIdAndUpdate() does not work

January 4, 2023
Michael Lee
2 Answers

I am trying to create a (MERN stack) management system that keeps track of vacant rooms in a hotel. I am trying to change the roomTypeAOccupiedTotal from 2 to 3. From the client side, it sends an axios.put()request as follows:…

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Mongoose/MongoDB: How can I $inc only the first value I get from an array?

January 4, 2023
Cinc-B
3 Answers

I have a Mongoose Schema that looks like this: { _id: ObjectID, storage: [{ location: String, storedFood: [{ code: String, name: String, weight: Number }] }] } And for example in storedFood can be the same Food twice. But I…

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Mongodb – how to change the nested subdocument field status to true or false

January 4, 2023
hareesh m
2 Answers

I need to change a specific nested sub document field in the document status to true or false, I know my schema is more nested but i don't have any other option this is my document model { "_id":"63b3b4024" "name":"dev"…

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Mongodb – Mongo filter documents where a given value is same as minimum value in array

January 3, 2023
usr_11
2 Answers

A collection called bookstore is as below (sample 2 documents): [{ "bookname": "hi", "orders" : [ {"rate" : 1}, {"rate" : 2} ] }, { "bookname":"hello", "orders" : [ {"rate" : 3}, {"rate" : 2}, {"rate" : 5} ] }]…

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Mongodb – MongooseServerSelectionError: connect ECONNREFUSED ::1:27017 at Connection.openUri

January 3, 2023
Hussain Lemonwala
2 Answers

I am getting error in my code that [nodemon] app crashed - waiting for file changes before starting... Mongodb is running in my pc. app.js const express = require("express"); const app = express(); app.use(express.json()); const product = require("./routes/ProductRoutes"); app.use("/api/v2", product);…

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