Parking hub

Django-based REST API for processing parking data.

Requirements

• Python 3.x
• PostgreSQL + PostGIS

Development

Install required system packages

PostgreSQL

The recommended versions for postgresql and postgis are at least 9.4 and 2.2 respectively.

# Ubuntu 16.04
sudo apt-get install python3-dev libpq-dev postgresql postgis

GeoDjango extra packages

# Ubuntu 16.04
sudo apt-get install binutils libproj-dev gdal-bin

Creating a virtualenv

Create a Python 3.x virtualenv either using the traditional virtualenv tool or using the great virtualenvwrapper toolset. Assuming the former, once installed, simply do:

mkvirtualenv -p /usr/bin/python3 parkkihubi

The virtualenv will automatically activate. To activate it in the future, just do:

workon parkkihubi

Python requirements

Use pip-tools to install and maintain installed dependencies.

pip install -U pip  # pip-tools needs pip==6.1 or higher (!)
pip install pip-tools

Install requirements as follows

pip-sync requirements.txt requirements-dev.txt

Django configuration

Environment variables are used to customize configuration in parkkihubi/settings.py. If you wish to override any settings, you can place them in a local .env file which will automatically be sourced when Django imports the settings file.

Create a basic file for development as follows

echo 'DEBUG=True' > .env

Parkkihubi settings

• PARKKIHUBI_PUBLIC_API_ENABLED default True
• PARKKIHUBI_MONITORING_API_ENABLED default True
• PARKKIHUBI_OPERATOR_API_ENABLED default True
• PARKKIHUBI_ENFORCEMENT_API_ENABLED default True

Database

Create user and database

sudo -u postgres createuser -P -R -S parkkihubi  # use password `parkkihubi`
sudo -u postgres createdb -O parkkihubi parkkihubi
sudo -u postgres psql parkkihubi -c "CREATE EXTENSION postgis;"

Allow user to create test database

sudo -u postgres psql -c "ALTER USER parkkihubi CREATEDB;"

Tests also require that PostGIS extension is installed on the test database. This can be achieved most easily by adding PostGIS extension to the default template:

sudo -u postgres psql -d template1 -c "CREATE EXTENSION IF NOT EXISTS postgis;"

Run migrations

python manage.py migrate

Updating requirements files

Use Prequ to update the requirements*.txt files.

pip install prequ

When you change requirements, set them in requirements.in or requirements-dev.in. Then run:

prequ update

Running tests

Run all tests

py.test

Run with coverage

py.test --cov-report html --cov .

Open htmlcov/index.html for the coverage report.

Importing parking areas

To import Helsinki parking areas run:

python manage.py import_parking_areas

Starting a development server

python manage.py runserver

Operator API will be available at http://127.0.0.1:8000/operator/v1/

Enforcement API will be available at http://127.0.0.1:8000/enforcement/v1/

Public API will be available at http://127.0.0.1:8000/public/v1/

Generating API documentation

The API documentation conforms to Swagger Specification 2.0.

Two possible ways (out of many) to generate the documentation:

• bootprint-openapi

  Probably the recommended way.

  Installation:

  npm install -g bootprint
  npm install -g bootprint-openapi
  

  Running (in parkkihubi repository root):

  bootprint openapi docs/api/enforcement.yaml </output/path/enforcement/>
  bootprint openapi docs/api/operator.yaml </output/path/operator/>
  

• swagger-codegen

  Due to a bug in swagger-codegen, we're using an unreleased version at the moment.

  To build swagger-codegen from source, you need Apache maven installed (you'll need java 7 runtime at a minimum):

    # Ubuntu
    sudo apt-get install maven
  

  Clone swagger-codegen master branch and build it:

    git clone https://github.com/swagger-api/swagger-codegen
    cd swagger-codegen/
    mvn clean package  # Takes a few minutes
  

  The client will now be available at modules/swagger-codegen-cli/target/swagger-codegen-cli.jar.

  To build the docs, in parkkihubi repository root:

    cd docs/api
    java -jar /path/to/codegen/swagger-codegen-cli.jar generate \
      -i enforcement.yaml -l html2 -c config.json \
      -o /output/path/enforcement/
    java -jar /path/to/codegen/swagger-codegen-cli.jar generate \
      -i operator.yaml -l html2 -c config.json \
      -o /output/path/operator/
  

License

MIT