Solution to removal of Heroku DB Injection

settings.py

try:
  if 'DATABASES' not in locals():
    DATABASES = {}

  if 'DATABASE_URL' in os.environ:
    url = urlparse.urlparse(os.environ['DATABASE_URL'])

    # Ensure default database exists.
    DATABASES['default'] = DATABASES.get('default', {})

    # Update with environment configuration.
    DATABASES['default'].update({
        'NAME': url.path[1:],
        'USER': url.username,
        'PASSWORD': url.password,
        'HOST': url.hostname,
        'PORT': url.port,
    })
    if url.scheme == 'postgres':
      DATABASES['default']['ENGINE'] = 'django.db.backends.postgresql_psycopg2'

    if url.scheme == 'mysql':
      DATABASES['default']['ENGINE'] = 'django.db.backends.mysql'
except Exception:
  print 'Unexpected error:', sys.exc_info()