sqlz-schema-middleware.js

var db = require('Sequelize')();
db.dialect.supports.schemas = true;
var Q =  db.dialect.QueryGenerator;
module.exports = function (req, res, next) {
	var schema = req.schema;
	var quoteTable = (param, as) {
		if ('string' == param) {
			param = { tableName: param };
		}
		param.schema = schema;
		return Q.quoteIdentifier(param, as);
	}

	req.db = Object.create(db, {
		dialect: {
			get: function () {
				return Object.create(db.dialect, {
					QueryGenerator: {
						get: function () {
							return Object.create(Q, {
								quoteTable: { value: quoteTable }
							});
						}
					}
				});
			}
		}
	});
	next();
}