from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_bcrypt import Bcrypt
from flask_wtf.csrf import CSRFProtect
from flask_migrate import Migrate

db = SQLAlchemy()
login_manager = LoginManager()
bcrypt = Bcrypt()
csrf = CSRFProtect()
migrate = Migrate()

login_manager.login_view = 'auth.login'
login_manager.login_message = '请先登录以访问此页面'
login_manager.login_message_category = 'warning'