每当调用API端点{{url}}/api/users/login
对用户进行身份验证时,我都希望从RDS检索用户数据,但是,我目前在从RDS检索数据时遇到问题
Flask==1.1.2
Flask-Cors==3.0.10
flask-marshmallow==0.14.0
Flask-Migrate==2.5.3
Flask-RESTful==0.3.8
Flask-SQLAlchemy==2.4.4
marshmallow==3.10.0
marshmallow-sqlalchemy==0.24.1
SQLAlchemy==1.4.0b1
python==3.7
我试图解决问题但没有成功的一些事情是:
我已停靠我的应用程序,这是我当前的设置:
app.py
from flask_marshmallow import Marshmallow
from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy
from flask_jwt_extended import JWTManager
db = SQLAlchemy()
ma = Marshmallow()
migrate = Migrate()
def register_extensions(app: Flask) -> None:
db.init_app(app)
migrate.init_app(app, db)
ma.init_app(app)
def create_application() -> Flask:
app: Flask = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql+mysqlconnector://{DB_USER}:{DB_PASSWORD}@{DB_INSTANCE}:{DB_PORT}"
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
register_extensions(app)
app.register_blueprint(users_urls.mod, url_prefix=f"/{BEP_PREFIX}/users")
return app
app = create_application()
CORS(app)
型号.py
class Accounts(db.Model):
__tablename__ = 'Accounts'
username = db.Column(db.String(100), primary_key=True)
password = db.Column(db.String(256), nullable=False)
email = db.Column(db.String(255), nullable=False)
personnelID = db.Column(db.String(255), nullable=False)
userType = db.Column(db.String(45), nullable=False)
service.py
class UserService(Service):
__model__ = Accounts
def get(self, username):
return Accounts.query.filter_by(username=username).first()
user_service = UserService()
视图.py
from bep.users.services import user_service
class UserLogin(Resource):
def post(self):
data = request.get_json()
try:
userData = user_service.get("test")
except Exception:
error_str = traceback.format_exc()
logger.error("This prints the stack", exc_info=True)
return UserServiceError.to_response(error=error_str, comments="Something went wrong while logging in")
问题是SQLAchemy 1.4中的更改引起的烧瓶sqlalchemy中的known issue。Flask sqlalchemy尝试修改sqlalchemy引擎的URL,但这些URL在sqlalchemy 1.4中是不可变的
这个问题在Alchemy 2.5+(changelog)中得到了解决
如果无法升级SQLAlchemy,可以通过指定通过命令行传递给
pip
的SQLAlchemy版本来解决此问题或者在requirements.txt中
SQLAlchemy 1.4于2021年3月15日正式发布
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