use knex.js as ES6 and work with .env

The below instructions are intended for command line execution while working with node server

install dotenv and knex.js

npm install knex --save

In the project root directory, create a folder called 'db' and navigate to this 'db' folder:

execute the following command:

npx knex init

A 'knexfile.js' will be created in this directory.

Change the file extension to .cjs

you will need to add the below line in your package.json file:

"type": "module",

create 2 subfolders inside 'db' folder, called "migrations" and "seeds"

data in .env file

This file should be placed in the project root directory

DEV_USER= DEV_DB= DEV_PASSWORD= DEV_HOST=localhost DEV_PORT=5432

knexfile.cjs configuration

// check current working directory const dir = process.cwd(); // check current running environment const env = process.env.ENVIRONMENT || "";

// current settings do not work for production mode

// TODO production mode checking

const config =

env === "development"

? require("dotenv").config({ path: dir + "/.env" })

require("dotenv").config({ path: "../.env" });

// the database details here // exports.development = {} exports.production = {}

below instructions are used on a terminal window navigate to 'db' folder

create a migration file type:

knex migrate:make create_XYZ_table --migrations-directory migrations

make sure to rename the file extensions to .cjs

execute migration type:

knex migrate:latest --knexfile knexfile.cjs --migrations-directory migrations

execute rollback type:

knex migrate:rollback --knexfile knexfile.cjs --migrations-directory migrations

knex URL: https://knexjs.org/guide/migrations.html#migration-cli

create a seed file type:

knex seed:make 01_XYZ_test_data --knexfile knexfile.cjs

make sure to rename the file extensions to .cjs

execute the seed file type:

knex seed:run --knexfile knexfile.cjs

to run the node server

navigate back to the project root directory and type:

ENVIRONMENT=development npm run dev