geodjango_settings.py

# psql:
# CREATE DATABASE mydatabase;
# \connect mydatabase
# CREATE EXTENSION postgis;

# GEOS from buildpack
try:
    GEOS_LIBRARY_PATH = os.path.join(os.environ['GEOS_LIBRARY_PATH'], 'libgeos_c.so')
    GDAL_LIBRARY_PATH = os.path.join(os.environ['GDAL_LIBRARY_PATH'], 'libgdal.so')
except:
    pass

# Local development
DATABASES = {
    'default': {
        'ENGINE': 'django.contrib.gis.db.backends.postgis',
        'NAME': 'mydatabase',
        'USER': '',
        'PASSWORD': '',
        'HOST': 'localhost',
        'PORT': '',
    }
}

# Heroku
HEROKU = bool(os.environ.get('DATABASE_URL'))
CI_TEST = bool(os.environ.get('CIRCLECI'))

if HEROKU:
    import dj_database_url
    DATABASES['default'] = dj_database_url.config()
    DATABASES['default']['ENGINE'] = 'django.contrib.gis.db.backends.postgis'
    POSTGIS_VERSION = (2, 1, 0)

# CI Testing (Circle CI)
if CI_TEST:
    DATABASES['default']['NAME'] = 'circle_test'
    DATABASES['default']['USER'] = 'ubuntu'