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https://github.com/nsidnev/fastapi-realworld-example-app

Backend logic implementation for https://github.com/gothinkster/realworld with awesome FastAPI
https://github.com/nsidnev/fastapi-realworld-example-app

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Backend logic implementation for https://github.com/gothinkster/realworld with awesome FastAPI

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----------

**NOTE**: This repository is not actively maintained because this example is quite complete and does its primary goal - passing Conduit testsuite.

More modern and relevant examples can be found in other repositories with ``fastapi`` tag on GitHub.

Quickstart
----------

First, run ``PostgreSQL``, set environment variables and create database. For example using ``docker``: ::

export POSTGRES_DB=rwdb POSTGRES_PORT=5432 POSTGRES_USER=postgres POSTGRES_PASSWORD=postgres
docker run --name pgdb --rm -e POSTGRES_USER="$POSTGRES_USER" -e POSTGRES_PASSWORD="$POSTGRES_PASSWORD" -e POSTGRES_DB="$POSTGRES_DB" postgres
export POSTGRES_HOST=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' pgdb)
createdb --host=$POSTGRES_HOST --port=$POSTGRES_PORT --username=$POSTGRES_USER $POSTGRES_DB

Then run the following commands to bootstrap your environment with ``poetry``: ::

git clone https://github.com/nsidnev/fastapi-realworld-example-app
cd fastapi-realworld-example-app
poetry install
poetry shell

Then create ``.env`` file (or rename and modify ``.env.example``) in project root and set environment variables for application: ::

touch .env
echo APP_ENV=dev >> .env
echo DATABASE_URL=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@$POSTGRES_HOST:$POSTGRES_PORT/$POSTGRES_DB >> .env
echo SECRET_KEY=$(openssl rand -hex 32) >> .env

To run the web application in debug use::

alembic upgrade head
uvicorn app.main:app --reload

If you run into the following error in your docker container:

sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

Ensure the DATABASE_URL variable is set correctly in the `.env` file.
It is most likely caused by POSTGRES_HOST not pointing to its localhost.

DATABASE_URL=postgresql://postgres:[email protected]:5432/rwdb

Run tests
---------

Tests for this project are defined in the ``tests/`` folder.

Set up environment variable ``DATABASE_URL`` or set up ``database_url`` in ``app/core/settings/test.py``

This project uses `pytest
`_ to define tests because it allows you to use the ``assert`` keyword with good formatting for failed assertations.

To run all the tests of a project, simply run the ``pytest`` command: ::

$ pytest
================================================= test session starts ==================================================
platform linux -- Python 3.8.3, pytest-5.4.2, py-1.8.1, pluggy-0.13.1
rootdir: /home/some-user/user-projects/fastapi-realworld-example-app, inifile: setup.cfg, testpaths: tests
plugins: env-0.6.2, cov-2.9.0, asyncio-0.12.0
collected 90 items

tests/test_api/test_errors/test_422_error.py . [ 1%]
tests/test_api/test_errors/test_error.py . [ 2%]
tests/test_api/test_routes/test_articles.py ................................. [ 38%]
tests/test_api/test_routes/test_authentication.py .. [ 41%]
tests/test_api/test_routes/test_comments.py .... [ 45%]
tests/test_api/test_routes/test_login.py ... [ 48%]
tests/test_api/test_routes/test_profiles.py ............ [ 62%]
tests/test_api/test_routes/test_registration.py ... [ 65%]
tests/test_api/test_routes/test_tags.py .. [ 67%]
tests/test_api/test_routes/test_users.py .................... [ 90%]
tests/test_db/test_queries/test_tables.py ... [ 93%]
tests/test_schemas/test_rw_model.py . [ 94%]
tests/test_services/test_jwt.py ..... [100%]

============================================ 90 passed in 70.50s (0:01:10) =============================================
$

If you want to run a specific test, you can do this with `this
`_ pytest feature: ::

$ pytest tests/test_api/test_routes/test_users.py::test_user_can_not_take_already_used_credentials

Deployment with Docker
----------------------

You must have ``docker`` and ``docker-compose`` tools installed to work with material in this section.
First, create ``.env`` file like in `Quickstart` section or modify ``.env.example``.
``POSTGRES_HOST`` must be specified as `db` or modified in ``docker-compose.yml`` also.
Then just run::

docker-compose up -d db
docker-compose up -d app

Application will be available on ``localhost`` in your browser.

Web routes
----------

All routes are available on ``/docs`` or ``/redoc`` paths with Swagger or ReDoc.

Project structure
-----------------

Files related to application are in the ``app`` or ``tests`` directories.
Application parts are:

::

app
├── api - web related stuff.
│   ├── dependencies - dependencies for routes definition.
│   ├── errors - definition of error handlers.
│   └── routes - web routes.
├── core - application configuration, startup events, logging.
├── db - db related stuff.
│   ├── migrations - manually written alembic migrations.
│   └── repositories - all crud stuff.
├── models - pydantic models for this application.
│   ├── domain - main models that are used almost everywhere.
│   └── schemas - schemas for using in web routes.
├── resources - strings that are used in web responses.
├── services - logic that is not just crud related.
└── main.py - FastAPI application creation and configuration.