Using node.js to create an mongodb connection runtime

Question

my node.js application has one mongodb (db1) which has user details. Each user has different db(mongodb). So I maintain all the db information in db1.

Here my question is based on user I need to open user db connection at runtime and perform some operation in user db.

Please help me how to do.

Answer 1

my app.js is.

var mongoose = require("mongoose"); 
var conn = mongoose.createConnection('mongodb://localhost/testA');
var conn2 = mongoose.createConnection('mongodb://localhost/testB');

var modelConfig = require('./api/model/action.model');

modelConfig.dynamicModel(conn, function (model) {
    model.create({name: 'testA', description: 'description A'}, function (err, data) {
        console.log("data: " + data);
        console.log("err: " + err);
    });
});

modelConfig.dynamicModel(conn2, function (model) {
    model.create({name: 'testB', description: 'description B'}, function (err, data) {
        console.log("data: " + data);
        console.log("err: " + err);
    });
});

My model file look like bellow.

'use strict';
var restful = require("node-restful");
var mongoose = restful.mongoose;
var modelConfig = require('../schema/action.schema');
var actionSchema = new mongoose.Schema(modelConfig.schema);

module.exports.dynamicModel = function(con,cb){
    var action = con.model(modelConfig.title, actionSchema);
    cb(action);
};

My schema file look like bellow.

'use strict';    
var restful = require("node-restful");
var mongoose = restful.mongoose;

module.exports = {
    title: "action",   //mongo db collection name
    schema: {
        name: { type: String, required: true, unique: true},
        description: { type: String, required: false} 
    }
}

install node-restful,mongoose and mongodb package and node app

it will save the recodes in testA and testB database.