Purchase Order System From DB Design to API Node js Backend and Complete Tutorial for Beginners

Описание: 🔥 Complete Purchase Order Flow in Node.js + PostgreSQL 🔥
In this video, we dive deep into building a Purchase Order (PO) management system from scratch using Node.js, Express.js, PostgreSQL, Knex.js, and JWT-based authentication with RBAC (Role-Based Access Control).

📌 Missed previous videos? Check out the full playlist here: [   • Inventory Management Application using Nod...  ]

🔗 GitHub Code Repository: [https://github.com/sjMalik/inventory-...]

Chapters

0:00 - 1:02 - Introduction
1:03 - 3:23 - Recap
3:24 - 4:41 - What is PO
4:42 - 6:13 - PO Database Scheme Design
6:14 - 9:01 - Migration of PO Table
9:02 - 13:23 - PO Model Design in Node
13:24 - 18:42 - PO Controller
18:43 - 23:20 - PO Router
23:21 - 25:26 - Build & Run Application
25:27 - 27:19 - Swagger Documentation for PO Routes
27:20 - 34:14 - Debug & Test List POs API from Swagger
34:15 - 40:45 - Debug & Test Create PO API
40:46 - 41:20 - Debug & Test Get PO API
41:21 - 42:26 - Debug & Test Update PO API
42:27 - 43:15 - Debug & Test Update PO Status API
43:16 - 44:37 - Debug & Test Delete PO API
44:38 - 45:41 - Wrap up

You’ll learn:
✅ Real-world Purchase Order Flow:

PM (Purchasing Manager) creates and sends PO to Supplier

Supplier receives, processes, and delivers goods

System receives and updates inventory

✅ Database Schema Design using PostgreSQL
✅ Defining Relationships between Purchase Orders, Products, and Users
✅ Creating Knex.js Migration Files
✅ Designing secure RESTful API Endpoints
✅ Implementing JWT Authentication & RBAC Middleware
✅ Validating request bodies using helper functions
✅ Structuring a scalable Node.js project with MVC patterns

🛠 Technologies used:

Node.js & Express.js

PostgreSQL with Knex.js

JWT for Authentication

Role-Based Access Control (RBAC)

RESTful APIs

Swagger/OpenAPI Documentation

Redis (for session/token caching)

📦 Sample Request Body, Routes, and Code Walkthroughs Included!

🚀 Whether you're building an Inventory Management System or learning to apply RBAC + Secure API practices, this video covers it all.

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#nodejs #nodejstutorial #postgresqltutorial #inventorymanagement #purchaseorder #rbac #jwt #backenddevelopment #restapis #knex #expressjs #databasedesign #webdevelopment