PythonFlaskRestAPI

Python RestAPI using Quart ASGI framework. It runs on HTTP/2 and will be HTTP/3 when mainstream browsers support it in the near future.

Database setup:

• This project uses PostgreSQL database with SQLAlchemy ORM with marshmallow for object SerDes.

Install python modules

$ pipenv install --python=/path/to/python
$ cd src
$ pipenv install --python=/path/to/python
$ cd test
$ pipenv install --python=/path/to/python

Create Database

• Firstly, create an empty database "library" in PostgreSQL

Database Migration

• run migrations initialization with db init command:

$ pipenv run alembic init migrations
$ pipenv run alembic revision --autogenerate -m "Initial migration"
$ pipenv run alembic upgrade head

• There will be 3 tables, "users", "books", and "authors" created in the PostgreSQL database "library" after the upgrade.

Test using PyTest:

• There are 7 test cases
  • JWT token generation and decoding
  • HomeController
  • FibonacciController

$ pytest -v
$ python -m pytest

Continuous Integration:

• Integrated with CircleCI

Start the application:

• ./quart.sh

Create User:

• POST https://localhost:8080/users/create

{
	"firstname": "First Name",
	"lastname": "LastName",
	"email": "firstname.lastname@email.com",
	"password": "P@$$w0rd"
}

Login:

• POST https://localhost:8080/users/login

{
	"email": "firstname.lastname@email.com",
	"password": "P@$$w0rd"
}

• Response:

{
    "jwt_token": "token string"
}

Subsequent request header:

Key: api-key
Vaue: jwt_token from the login response

Create Author:

• POST https://localhost:8080/authors/create

{
    "email": "jk@email.com",
    "firstname": "JK",
    "lastname": "Rowing"
}

Create Book:

• POST https://localhost:8080/books/create

{
    "author_id": 1,
    "isbn": "123456",
    "page_count": "123",
    "title": "My First Book"
}

Delete an author:

• Books table has a foreign key id to Authors.id and this is defined as required in BookSchema.
• Therefore, when a DELETE RESTful operation is sent to the application to delete an author which has associated book:

mysql.connector.errors.IntegrityError: 1048 (23000): Column 'author_id' cannot be null

Get Requests:

• Headers:

Key: api-key
Vaue: jwt_token from the login response

• visit https://localhost:8080
• visit https://localhost:8080/fibonacci/
• visit https://localhost:8080/users/all
• visit https://localhost:8080/authors/all
• visit https://localhost:8080/books/all