config.py

import os
basedir = os.path.abspath(os.path.dirname(__file__))

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'hard to guess string'
    SQLALCHEMY_COMMIT_ON_TEARDOWN = True
    FLASKY_MAIL_SUBJECT_PREFIX = '[Flasky]'
    FLASKY_MAIL_SENDER = os.environ.get('MAIL_SENDER')
    FLASKY_ADMIN = os.environ.get('FLASKY_ADMIN')
    FLASKY_POSTS_PER_PAGE = 20;
    FLASKY_FOLLOWERS_PER_PAGE = 50
    FLASKY_COMMENTS_PER_PAGE = 50
    SQLACHEMY_RECORD_QUERIES = True
    FLASKY_SLOW_DB_QUERY_TIME = 0.5
    
    @staticmethod
    def init_app(app):
        pass

class DevelopmentConfig(Config):
    DEBUG = True
    MAIL_SERVER = 'smtp.qq.com'
    MAIL_PORT = 25
    MAIL_USE_TLS = True
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    SQLALCHEMY_DATABASE_URI = os.environ.get('DEV_DATABASE_URL')
        
class TestingConfig(Config):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('TEST_DATABASE_URL')
    WTF_CSRF_ENABLED = False
        
class ProductionConfig(Config):
    MAIL_SERVER = 'smtp.qq.com'
    MAIL_PORT = 25
    MAIL_USE_TLS = True
    MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
    MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
    SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL')
        
config = {
    'development': DevelopmentConfig,
    'testing': TestingConfig,
    'production': ProductionConfig,
    
    'default': DevelopmentConfig
}