About

This module uses the config package along with Joi to validate the config

Installation

npm install @alphaapps/nestjs-config

The module uses @nestjs/common along with config & @hapi/joi packages so you should install them too (if not installed already):

npm install @nestjs/common config @hapi/joi

Usage

Import the config module and call the register method in the imports array in the app.module.ts file.

import { Module } from '@nestjs/common';
import { ConfigModule } from '@alphaapps/nestjs-config';
import schema from './configSchema';

@Module({
  imports: [
    ConfigModule.register({ schema }), // pass a Joi schema to validate the config against
    ConfigModule.register() // don't pass anything if you don't want any validation
  ],
})
export class AppModule {}

Refer to config docs for more on how to write and include config files in the project.

A Joi schema example:

import Joi from '@hapi/joi';

const envVarsSchema: any = {
  server: {
    port: Joi.number().min(1024)
  },
  db: {
    dialect: Joi.string().allow('postgres', 'mysql'),
    host: Joi.string(),
    port: Joi.number(),
    username: Joi.string(),
    password: Joi.string(),
    database: Joi.string(),
    define: {
      underscored: Joi.bool(),
      paranoid: Joi.bool(),
      timestamps: Joi.bool(),
      freezeTableName: Joi.bool()
    }
  },
  JWT: {
    secretKey: Joi.string().required()
  },
};

export default envVarsSchema;

Configuration Service:

A service to store and retrieve config values. The main purpose of this is to store config values in db if clients wants to change them.
When calling ConfigService.get method it checks the db first for this config, if not found then retrieve it from app config.