Setting up knex - the very basics

.tg_knex.js

// $ knex init

const nodeEnv = process.env.NODE_ENV || 'development'
const knexfileConfig = require('./knexfile')[nodeEnv]
const es = require('event-stream')

var knex = require('knex')(knexfileConfig);

// non stream usage
knex.raw('select * from genres')
.then(r => console.log(r))
.finally(() =>knex.destroy());

// stream like usage
s = knex.raw('select * from genres').stream()
s.pipe(es.mapSync( ch => console.log(ch.Name)))

knexfile.js

// Update with your config settings.

module.exports = {

  development: {
    client: 'sqlite3',
    connection: {
      filename: './chinook.db'  //dev.sqlite3
    },
    useNullAsDefault: true
  },

  staging: {
    client: 'postgresql',
    connection: {
      database: 'my_db',
      user:     'username',
      password: 'password'
    },
    pool: {
      min: 2,
      max: 10
    },
    migrations: {
      tableName: 'knex_migrations'
    }
  },

  production: {
    client: 'postgresql',
    connection: {
      database: 'my_db',
      user:     'username',
      password: 'password'
    },
    pool: {
      min: 2,
      max: 10
    },
    migrations: {
      tableName: 'knex_migrations'
    }
  }

};