app/config.py

config.py

from os import getenv


class Config:
    SECRET_KEY = getenv('SECRET_KEY', 'hard to guess string')
    PROPAGATE_EXCEPTIONS = True

    SQLALCHEMY_ECHO = getenv('SQLALCHEMY_ECHO') == 'true'
    SQLALCHEMY_DATABASE_URI = getenv('DATABASE_URL')
    SQLALCHEMY_TRACK_MODIFICATIONS = True

    @staticmethod
    def init_app(app):
        pass


class DevelopmentConfig(Config):
    DEBUG = True


class TestingConfig(DevelopmentConfig):
    TESTING = True


class StagingConfig(Config):
    SQLALCHEMY_TRACK_MODIFICATIONS = False


class ProductionConfig(Config):
    SQLALCHEMY_TRACK_MODIFICATIONS = False


config = dict(
    development=DevelopmentConfig,
    testing=TestingConfig,
    staging=StagingConfig,
    production=ProductionConfig,
    default=DevelopmentConfig
)