config.py

# config.py
import os
# Enable Flask's debugging features. Should be False in production

class Config(object):
    """
    Common configurations
    """
    # Put any configurations here that are common across all environments
    DEBUG = False
    CSRF_ENABLED = True
    SECRET = os.getenv('SECRET')
    SQLALCHEMY_DATABASE_URI = os.getenv('DATABASE_URL')

class DevelopmentConfig(Config):
    """
    Development configurations
    """
    DEBUG = True
    TESTING = True
    # SQLALCHEMY_DATABASE_URI = 'postgresql://%(user)s:\
    # %(pw)s@%(host)s:%(port)s/%(db)s' % POSTGRES


class TestingConfig(Config):
    """Configurations for Testing, with a separate test database."""
    TESTING = True
    # SQLALCHEMY_DATABASE_URI = 'postgresql://test:admin@localhost/test_db'
    SQLALCHEMY_DATABASE_URI = os.getenv('TEST_DATABASE_URL')
    DEBUG = True

class ProductionConfig(Config):
    """
    Production configurations
    """

    DEBUG = False

app_config = {
    'development': DevelopmentConfig,
    'testing': TestingConfig,
    'production': ProductionConfig
}