Need to use multiple database in node mongodb/mongoose

Question

Well, i am stuck in little technical stuff let me explain.

i have one database with name of Company and in this i have two columns name and DBname and i have multiple Companies databases now i want to call company data based on Company DB.

i already have connected company databse like this in my main index.js

  const connect = mongoose.connect( 'mongodb://localhost/Company',
  {
    useNewUrlParser: true, useUnifiedTopology: true,
    useCreateIndex: true, useFindAndModify: false
  })
  .then(() => console.log('MongoDB Connected...'))
  .catch(err => console.log(err));

but i have to change this connecting when user is logged in based on user company database

for this i am using a DB middleware like this

const mongoose = require("mongoose");

let DB = (req, res, next) => {
    const connect = mongoose.createConnection( 'mongodb://localhost/company_ABC',
      {
        useNewUrlParser: true, useUnifiedTopology: true,
        useCreateIndex: true, useFindAndModify: false
      })
      .then(() => console.log('MongoDB Connected...'))
      .catch(err => console.log(err));
      next();
};

module.exports = { DB };

like this and it's not working please help me to resolve this issue and thanks in advance

Answer 1

Remove the DB name after the connection string.

 const connect = mongoose.connect( 'mongodb://localhost/', { useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true, useFindAndModify: false }) .then(() => console.log('MongoDB Connected...')) .catch(err => console.log(err));

Select the database in your schema file instead and export it

 const mongoose = require('mongoose') const db = mongoose.connection.useDb("company") const collection = db.model('collectionName', collectionSchema); module.exports = { collection };

 const { collection } = require('path-to-schema'); const files = await collection.find({})......