StrongerProgrammer7 / TwoService

One user service, another history service and Service users(1mil) with nestjs and migration

TwoService and NestJS

Instruments

1. PostgreSQL - 15.6
2. Node - 20.12.2
3. npm - 10.5.0
4. nest - 10.3.2

RUN TwoService

cd service && npm i

ENV-Express

Please create .env file in service/

PASSWORD = your_password_postgres
PORT_DB = your_port_for_db_postgres (standart 5432)
DATABASE = user_action_service_db
HOST = localhost

NODE_ENV = development (production without logger)
PORT_1 = 8000
PORT_2 = 8001
PORT_3 = 8002

Database-Express

If you not have psql (command in terminal) make:

1. Open PostgreSQL (example pgAdmin4)
2. Copy content from ~/sql_scripts/dbUserService.sql
3. Put content to sql-query and execute
4. Analog for generate data ~/sql_scripts/generateUsers.sql
5. Well done, db,table,func,proc,view created!

If you have psql command in terminal make:

• npm run init_db
• npm run generate_data

Start express

This 2 services and use one swagger!

first service use port 8000:

• Create user,change user, get users
• Choose in swagger localhost:8000

second service use port 8001:

• Save create/change use to history and get history by id user with limit and page
• Choose in swagger localhost:8001

third service - main service use port 8002:

without restart: npm run start with restart: npm run dev

This using swagger GO: http://localhost:8002/docs

RUN NestJS

cd nestjs-project && npm i

ENV-NestJS

Please create .env file in nestjs-project/

PASSWORD = your_password_postgres
PORT_DB = your_port_for_db_postgres (standart 5432)
DATABASE = user_action_service_db
HOST = localhost

NODE_ENV = development (production without logger)
PORT = 7000

Database-NestJS

For NestJS create database in postgre SQL

CREATE DATABASE user_action_service_db

Migration

Migration already exists, using: npm run migrate

If you want new migration you can generate: npm run migration:gen then add in func "up" next

      INSERT INTO users (first_name, last_name, age, gender, has_problems)
      SELECT
        'FirstName' || i,
        'LastName' || i,
        (RANDOM() * 50 + 20)::INTEGER,
        CASE WHEN RANDOM() < 0.5 THEN 'Male' ELSE 'Female' END,
        CASE WHEN RANDOM() < 0.5 THEN true ELSE false END
      FROM generate_series(1, 1000000) s(i);
    ');

Start nestjs

npm run start

with log

npm run start:dev

This using swagger, GO: http://localhost:7000