config.py

import os

BASE_DIR = os.path.abspath(os.path.dirname(__file__))

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY', 'supersecret')
    SQLALCHEMY_TRACK_MODIFICATIONS = os.environ.get(
        'SQLALCHEMY_TRACK_MODIFICATIIONS', False)
    PER_PAGE = int(os.environ.get('PER_PAGE')) or 50
    MAIL_SERVER = os.environ.get('MAIL_SERVER')
    MAIL_PORT = os.environ.get('MAIL_PORT')
    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS')
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    MAIL_SENDER = os.environ.get('MAIL_SENDER')

    @staticmethod
    def init_app(app):
        pass


class DevelopmentConfig(Config):
    SQLALCHEMY_DATABASE_URI = os.environ.get('DEV_DATABASE_URI') or \
        'sqlite:///' + os.path.join(BASE_DIR, 'dev.db')


class ProductionConfig(Config):
    SQLALCHEMY_DATABASE_URI = os.environ.get('PROD_DATABASE_URI')


config = {"development": DevelopmentConfig, "production": ProductionConfig}