lib/dialects/postgres/migrator.js
module.exports = function(client) { var Migrator = require('../../migrate'); var inherits = require('inherits');

Inherit from the Migrator constructor's prototype, so we can add the correct then method.

function Migrator_PG() { this.client = client; Migrator.apply(this, arguments); } inherits(Migrator_PG, Migrator);

Assign the newly extended Migrator constructor to the client object.

client.Migrator = Migrator_PG; };