Mongoose model basic express routes

basic-model-routes.js

'use strict';

/*
    Credits to Jakob Mattsson
    Link: https://vimeo.com/51736205
*/

function _createModelRoutes(modelName, app) {
    var Model = models[modelName],
        // http://stackoverflow.com/questions/8955533/javascript-jquery-split-camelcase-string-and-add-hyphen-rather-than-space
        routeName = modelName.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
    console.log('Configuring model (%s) basic routes...', modelName);
    
    app.get('/' + routeName, function _finderRoute(req, res, next) {
        var offset = req.query.offset = || 0,
            size = req.query.size || 2,
            sortBy = req.sortBy || 'id',
            query;
        
        query = Model.find()
            .skip(offset * size)
            .limit(size)
            .sort(sortBy);
        
        if (req.query.exclude) {
            query.select('-' + req.query.exclude.split(',').join(' -'));
        }
        
        query.exec(function _finderResult(err, data) {
            err ? next(err) : res.json(data);
        });
    });
    
    app.get('/' + routeName + '/:id', function _getHandler(req, res, next) {
        Model.findById(req.params.id, function _getResult(err, data) {
            err ? next(err) : res.json(data);
        });
    });
    
    app.post('/' + routeName, function _postHandler(req, res, next) {
        var instance = new Model(req.body);
        instance.save(function _saveResult(err, data) {
            err ? next(err) : res.json(data);
        });
    });
    
    app.put('/' + routeName + '/:id', function _putHandler(req, res, next) {
        Model.update({ _id: req.params.id }, req.body, { multi: false }, function _putResult(err, count) {
            err ? next(err) : res.json({ count: count });
        });
    });
    
    app.del('/' + routeName + '/:id', function _deleteHandler(req, res, next) {
        Model.remove({ _id: req.params.id }, function _deleteResult(err, count) {
            err ? next(err) : res.json({ count: count });
        });
    });
}

module.exports.configureModelsBasicRoutes = function _configureModelsBasicRoutes(models, app) {
    Object.keys(models).forEach(function _modelsIterator(modelName) {
        __createModelRoutes(modelName, app);
    });
};