Lecture_Notes/imperfect_notes/pragy/Project Building - Psych - Coding 1.md

Psych Coding 1

Base Setup

1. Create free account on Heroku

2. Install Heroku CLI https://devcenter.heroku.com/articles/getting-started-with-java#set-up

3. Install PostgreSQL https://www.postgresql.org/download/

   brew install postgres
   sudo chown -R `whoami` /usr/local
   

4. Ensure postgres is started automatically on boot

   pg_ctl -D /usr/local/var/postgres start && brew services start postgresql
   postgres -V
   

5. Create new Idea Project

   1. Spring Initializer
   2. • SDK 11 or 13
      • com.psych.game
      • Scaler Backend Project - Psych
      • Java 11
      • Maven
   3. • Spring Boot Dev Tools
      • Lombok
      • Spring Web
      • Rest Repositories
      • Spring Web Services
      • Spring Data JPA
      • PostgreSQL Driver
   4. name: pragypsych

---

Hello World

1. Create File: devtest.HelloController

   package com.psych.game.devtest;
   
   import org.springframework.web.bind.annotation.GetMapping;
   import org.springframework.web.bind.annotation.RequestMapping;
   import org.springframework.web.bind.annotation.RestController;
   
   @RestController
   @RequestMapping("/dev-test")
   public class HelloController {
       @GetMapping("/")
       public String hello() {
           return "Hello, World!";
       }
   }
   

2. Try Build & Run
   • Build succeeds
   • Run fails: Because No DB
3. Run postgres

   psql postgres
   \du                  # display users
   \list                # list databases
   create database psych_local;
   \connect psych_local # connect to specific DB
   \dt                  # display tables in current DB
   # psql postgres -U pragyagarwal
   

4. Add psych_local DB to IntelliJ
5. Create application.properties

   spring.datasource.url=jdbc:postgresql://localhost:5432/psych_local
   spring.jpa.hibernate.ddl-auto=update
   
   

6. Run again. Go to http://localhost:8080/dev-test/

---

Deploy on Heroku

1. Create new project.

   heroku create pragy-psych
   

2. goto https://pragy-psych.herokuapp.com/ to find nothing
3. add git

   git init
   git add .
   git commit -m "Init"
   

4. add heroku remote

   git remote add heroku https://git.heroku.com/pragy-psych.git
   

5. Deploy

   git push heroku master
   

6. Error: Push Rejected - invalid target release: 11
7. Create system.properties

   java.runtime.version=11
   

8. Add, commit & deploy
9. Goto https://pragy-psych.herokuapp.com/dev-test/
10. Goto https://dashboard.heroku.com/apps/pragy-psych to see your stuff
11. Note: it auto adds postgres free account
12. See the logs

    heroku logs --tail
    

---

Make the models

---

Test

https://pragy-psych.herokuapp.com/dev-test/ https://pragy-psych.herokuapp.com/dev-test/questions https://pragy-psych.herokuapp.com/dev-test/populate

---

Post Lecture

Restore

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