dandi-api

Develop with Docker (recommended quickstart)

This is the simplest configuration for developers to start with.

Initial Setup

1. Run docker-compose run --rm django ./manage.py migrate
2. Run docker-compose run --rm django ./manage.py createsuperuser and follow the prompts to create your own user. Set your username to your email to ensure parity with how GitHub logins work.
3. Run docker-compose run --rm django ./manage.py create_dev_dandiset --owner your.email@email.com to create a dummy dandiset to start working with.

Run Application

1. Run docker-compose up
2. Access the site, starting at http://localhost:8000/admin/
3. When finished, use Ctrl+C

Application Maintenance

Occasionally, new package dependencies or schema changes will necessitate maintenance. To non-destructively update your development stack at any time:

1. Run docker-compose pull
2. Run docker-compose build --pull --no-cache
3. Run docker-compose run --rm django ./manage.py migrate

Develop Natively (advanced)

This configuration still uses Docker to run attached services in the background, but allows developers to run Python code on their native system.

Initial Setup

1. Install Docker and Docker Compose
2. Run docker-compose -f ./docker-compose.yml up -d
3. Install Python 3.8
4. Install psycopg2 build prerequisites. Example psycopg2 installation on Ubuntu 20.04:

sudo apt install libpq-dev
export PATH=/usr/lib/postgresql/X.Y/bin/:$PATH
pip install psycopg2

5. Create and activate a new Python virtualenv
6. Run pip install -e .[dev]
7. Run source ./dev/export-env.sh
8. Run ./manage.py migrate
9. Run ./manage.py createsuperuser and follow the prompts to create your own user
10. Run ./manage.py create_dev_dandiset --owner your.email@email.com to create a dummy dandiset to start working with.

Run Application

1. Ensure docker-compose -f ./docker-compose.yml up -d is still active
2. Run:
   1. source ./dev/export-env.sh
   2. ./manage.py runserver
3. Run in a separate terminal:
   1. source ./dev/export-env.sh
   2. celery --app dandiapi.celery worker --loglevel INFO --without-heartbeat
4. When finished, run docker-compose stop

Remap Service Ports (optional)

Attached services may be exposed to the host system via alternative ports. Developers who work on multiple software projects concurrently may find this helpful to avoid port conflicts.

To do so, before running any docker-compose commands, set any of the environment variables:

• DOCKER_POSTGRES_PORT
• DOCKER_RABBITMQ_PORT
• DOCKER_MINIO_PORT

The Django server must be informed about the changes:

• When running the "Develop with Docker" configuration, override the environment variables:
  • DJANGO_MINIO_STORAGE_MEDIA_URL, using the port from DOCKER_MINIO_PORT.
• When running the "Develop Natively" configuration, override the environment variables:
  • DJANGO_DATABASE_URL, using the port from DOCKER_POSTGRES_PORT
  • DJANGO_CELERY_BROKER_URL, using the port from DOCKER_RABBITMQ_PORT
  • DJANGO_MINIO_STORAGE_ENDPOINT, using the port from DOCKER_MINIO_PORT

Since most of Django's environment variables contain additional content, use the values from the appropriate dev/.env.docker-compose* file as a baseline for overrides.

Testing

Initial Setup

tox is used to execute all tests. tox is installed automatically with the dev package extra. To install the tox pytest dependencies into your environment, run pip install -e .[test]. These are useful for IDE autocompletion or if you want to run pytest directly (not recommended).

When running the "Develop with Docker" configuration, all tox commands must be run as docker-compose run --rm django tox; extra arguments may also be appended to this form.

Running Tests

Run tox to launch the full test suite.

Individual test environments may be selectively run. This also allows additional options to be be added. Useful sub-commands include:

• tox -e lint: Run only the style checks
• tox -e type: Run only the type checks
• tox -e test: Run only the pytest-driven tests
• tox -e test -- -k test_file: Run the pytest-driven tests that match the regular expression test_file
• tox -e test -- --cov=dandiapi: Generate a test coverage report
• tox -e test -- --cov=dandiapi --cov-report=html: Generate an HTML test coverage report in the htmlcov directory

To automatically reformat all code to comply with some (but not all) of the style checks, run tox -e format.

API Authentication

Read-only API endpoints (i.e. GET, HEAD) do not require any authentication. All other endpoints require token authentication to call.

Creating a Token

Visit the URL /admin with a web browser, logging in with the credentials entered during the createsuperuser setup step.. Then go to /swagger and use GET /auth/token end-point.

Supplying the Token

In API endpoint calls, add the Authorization HTTP header with a value of Token <token_value>. For example, for a token 1234, include the header: Authorization: Token 1234.