express - How do I expose my initialized bookshelf object to my routes file? -

as first foray nodejs/express/bookshelf please gentle , verbose if possible regards comments/answers.

i'm having hard time figuring out how use express bookshelf, specifically, exposing objects in various modules. bookshelf docs ideally initialization should happen once , initialized bookshelf instance should returned 'throughout library'.

in app.js file create knex/bookshelf connection database, , define model mapping table want..

(app.js)

var knex = require('knex')({     client: 'sqlite3',     connection: {         filename: '<path-to-my-db'     } });  ... var questionroutes = require('./routes/questions'); var app = express(); var bookshelf = require('bookshelf')(knex);  // define model var question = bookshelf.model.extend({     tablename: 'questions' });  ...  app.use('/', routes); app.use('/api', questionroutes); 

in routing file want pull in data using bookshelf...

(routes/quesions.js)

var express = require('express'); var router = express.router();  // on routes end in /questions ... router.get('/questions', function (req, res) {     new question()         .fetchall()         .then(function (questions) {             console.log(questions.tojson());         }); }); 

...but how expose question model object routing file? or, alternatively, if moved model definition routes, how expose initialized bookshelf instance?

i haven't been able find useful reference apps bookshelf, code snippets , api docs.

i'm learning node.js , related stuff well; have done follows:

lib/common/bookshelf.js sets bookshelf.js:

var dbconfig = {    client: 'sqlite3'    // ... }; var knex = require('knex')(dbconfig); var bookshelf = require('bookshelf')(knex); module.exports = bookshelf; 

lib/model/question.js file define question model:

var bookshelf = require("../common/bookshelf"); var question = bookshelf.model.extend({     tablename: 'questions' }); 

lib/routes/question.js:

var question = require('../model/question'); // rest of code.