Create API with Django

Check python environment

python -v

pip -v

Install virtualenv

pip install virtualenv

Create virtualenv

virtualenv {name}

source {name}/bin/activate

Create django project

django-admin startproject {Project_name}

cd {Project_name}

Install Django

pip install django

Move to project folder

cd {Project_name}

Create django application

django-admin startapp {App_name}

1. Check django admin

python manage.py migrate

python manage.py createsuperuser

2. setup django

Reference: https://bit.ly/3jpvmOQ

3. setup PostgreSQL

Install postgreSQL

brew install postgresql

Install check

psql -V

Start PostgreSQL

brew services start postgresql

Check

brew services list

check default database

psql -l

check default database

psql -l

create user

createuser -P postgres

Create database

createdb demo_api -O postgres;

pip install dj_database_url
pip install python-dotenv
pip install psycopg2-binary

In setting.py.

(TOP line)
---
from dotenv import (find_dotenv, load_dotenv)
import dj_database_url
---


(Override database setting line)
---
load_dotenv(find_dotenv())
DATABASES = {
    'default': dj_database_url.config(conn_max_age=600)
}
---

Create .env in top directory.

DATABASE_URL=postgres://postgres:postgres@localhost/demo_api

*DATABASE_URL=postgres://{username}:{password}@localhost/{DBName}

Connect from django and check admin site

python manage.py makemigrations
python manage.py migrate

python manage.py createsuperuser
python manage.py runserver

4. setup cors

Install cors library

pip install django-cors-headers

Add corsheaders to setting.py

INSTALLED_APPS = [
    ...
    'corsheaders',
]

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
     ...
]

---Last line---

CORS_ORIGIN_ALLOW_ALL = True

---

https://pypi.org/project/django-cors-headers/

5. Prepare for Deploying to Heroku

Install libraries

pip install whitenoise
pip install gunicorn

Modify setting.py

---Near Top---
import os

DEBUG = False

ALLOWED_HOSTS = ['*']
---



MIDDLEWARE = [
    ...
    'whitenoise.middleware.WhiteNoiseMiddleware',
]

---Near STATIC_URL---

STATIC_URL = '/static/'

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

---

http://whitenoise.evans.io/en/stable/

Create a Procfile file in top directory.

web: gunicorn {project_folder name}.wsgi

Execute the command in top directory.

pip freeze > requirements.txt

6. Deploy to Heroku

Connect github to heroku by using GUI.