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 <https://docs.pytest.org/>
_ 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 <https://docs.pytest.org/en/latest/usage.html#specifying-tests-selecting-tests>
_ 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.