config.py

#!/usr/bin/env python
# coding=utf-8
import os
basedir = os.path.abspath(os.path.dirname(__file__))

class Config:
    SECRET_KEY = os.environ.get('SECRET_KEY') or 'hard to guess'
    SQLALCHEMY_COMMIT_ON_TEARDOWN = True
    FLASKY_MAIL_SUBJECT_PREFIX='[Blog]'
    FLASKY_MAIL_SENDER = 'Flasky Admin <flasky@example.com>'
    FLASKY_ADMIN = os.environ.get('FLASKY_ADMIN')
    FLASKY_POSTS_PER_PAGE = 10

    @staticmethod
    def init_app(app):
        pass

class DevelopmentConfig(Config):
    DEBUG = True
    MAIL_SERVER = 'smtp.googlemail.com'
    MAIL_PORT = 587
    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') or 'postgresql://dbuser:rootpass@localhost:5432/exampledb'

class TestingConfig(Config):
    TESTING = True
    SQLALCHEMY_DATABASE_URI = os.environ.get('TEST_DATABASE_URL') or 'postgresql://dbuser:rootpass@localhost:5432/exampledb'

class ProductionConfig(Config):
    SQLALCHEMY_DATABASE_URI = os.environ.get('DABASE_URL') or 'postgresql://dbuser:rootpass@localhost:5432/exampledb'

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