# 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