A have a collection Products in MongoDB: { "name": "My Product 01", "description": "This is an excelent product", "tags": [ "AA", "BBBB", "C", "DDDDDDDDDDD" ] } How can I find the single longest occurrence if an item in the whole…
I have 3 collections(User, Credit and Status). Every User have 1 Credit data and Many Status Data like this: Users Document [ { "_id": ObjectId("669fbce1704d41e9040cbb41"), "Name": "First User" }, { "_id": ObjectId("669fbce1704d41e9040cbb42"), "Name": "Second User" }, { "_id": ObjectId("669fbce1704d41e9040cbb43"), "Name":…
Hello I have a mongo code, I have write this : db.Department.aggregate([ { $match: { ParentRef: null } }, { $lookup: { from: "Department", localField: "Syscode", foreignField: "ParentRef", as: "N2" } }, { $unwind: { path: "$N2", preserveNullAndEmptyArrays: true }…
Storing all my Mongo properties in an external application.properties files and reading them with the provided classes. I'm using them in a bean to build DatabaseFactory objects, but they read null when the bean is accessed - even after reading…
I have a mongodb that is accessed through an API via the "requests" package. Within the database there are numerous schema we've set up; as an example, one of these is a "surveys" collection in which documents each listing different…
i am trying to get a string from all documents in a mongo db collection, but when it starts it give me an error: 106 | * not subject to semantic versioning compatibility guarantees and may change at any time.…
i have created groups , which has members , each member has a group array displaying which they are part of . if i delete a group i want that user's group array also updates. i am using express and…
import React, { useEffect, useState } from 'react'; import axios from "axios"; import './List.css'; import { toast } from "react-toastify"; const List = () => { const url = "http://localhost:4500"; const [list, setList] = useState([]); const fetchList = async ()…
I have to check a Boolean flag and base on its condition return different data result. for example I have a collection of books and their prices, normal result of query is prices matching 10, BUT IF showAll flag is…
in index.js, const express = require("express") const mongoose = require("mongoose") const cors = require("cors") const CustomerModel = require('./models/Customer') const app = express() app.use(express.json()) app.use(cors()) mongoose.connect("mongodb://localhost:27017/customer") app.post("/login", (req, res) => { const {email, password} = req.body CustomerModel.findOne({email: email}) .then(user => {…