与sqlalchemy的神秘错误：TypeError'用户'对象不可调用

我想创建一个简单的应用程序使用烧瓶和sqlalchemy链接到MySQL数据库。我在我的数据库中创建了一个包含一些虚拟数据的用户表，并试图在我的/ api路由上测试一个示例查询。我不断收到内部服务器错误，而且我的生活无法弄清楚发生了什么。我以前制作过类似的应用程序，它从来没有给我这个奇怪的错误。堆栈跟踪如下：与sqlalchemy的神秘错误：TypeError'用户'对象不可调用

2016-12-02 22:15:16,079 - app - ERROR - Exception on /api [GET] 
    Traceback (most recent call last): 
     File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1988, in wsgi_app 
     response = self.full_dispatch_request() 
     File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1642, in full_dispatch_request 
     response = self.make_response(rv) 
     File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1746, in make_response 
     rv = self.response_class.force_type(rv, request.environ) 
     File "/usr/local/lib/python2.7/dist-packages/werkzeug/wrappers.py", line 847, in force_type 
     response = BaseResponse(*_run_wsgi_app(response, environ)) 
     File "/usr/local/lib/python2.7/dist-packages/werkzeug/wrappers.py", line 57, in _run_wsgi_app 
     return _run_wsgi_app(*args) 
     File "/usr/local/lib/python2.7/dist-packages/werkzeug/test.py", line 871, in run_wsgi_app 
     app_rv = app(environ, start_response) 
    TypeError: 'User' object is not callable

app.py

from flask import Flask 
from database.models import User 
from sqlalchemy.orm import sessionmaker, scoped_session 
from sqlalchemy import create_engine 

engine = create_engine('mysql://root:[email protected]/testdb', convert_unicode=True) 

Session = sessionmaker(autocommit=False, autoflush=False, bind=engine) 

# Create a scoped session 
ssession = scoped_session(Session) 

app = Flask(__name__) 


# Setup our error logging 
if app.debug is not True: 
    import logging 
    from logging.handlers import RotatingFileHandler 
    file_handler = RotatingFileHandler('errors.log', maxBytes=1024 * 1024 * 100, backupCount=20) 
    file_handler.setLevel(logging.ERROR) 
    formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s") 
    file_handler.setFormatter(formatter) 
    app.logger.addHandler(file_handler) 


@app.route('/') 
def index(): 
    return 'hello world' 


@app.route('/api') 
def api_route(): 
    # Error is happening right here 
    return ssession.query(User).first() 


if __name__ == '__main__': 
    app.run(debug=False)

数据库/ models.py

from datetime import datetime 
from sqlalchemy.ext.declarative import declarative_base 
from sqlalchemy import Column, Integer, String, BLOB, \ 
    DateTime, ForeignKey 

Base = declarative_base() 

class User(Base): 
    __tablename__ = 'User' 

    id = Column(Integer, primary_key=True) 
    email = Column(String(64), unique=True) 
    password = Column(String(255)) 
    join_date = Column(DateTime) 
    last_login = Column(DateTime) 
    login_count = Column(Integer, default=0) 
    name = Column(String(128), default=None) 
    location = Column(String(128), default=None) 
    points = Column(Integer, default=0) 
    num_posts = Column(Integer, default=0) 

    def __init__(self, email, password): 
     self.email = email 
     self.password = password 
     self.join_date = datetime.utcnow() 
     self.last_login = datetime.utcnow() 

    def __repr__(self): 
     return '<User %r>' % self.email

我完全不知道自己为什么这是不工作 - 如果我导入所有必要的模块，它实际上在python控制台中工作得很好！任何见解都会很棒。

来源

2016-12-02 Jesse Bartola

return ssession.query(User).first()

您试图返回一个不允许的用户对象。您将需要返回不同的类型。作为一个非常简单的例子，下面将返回用户的电子邮件。

return ssession.query(User).first()['email']

您可能想要返回用户的JSON表示，为此我会考虑Flask-Marshmallow。

来源

2016-12-03 13:34:23

与sqlalchemy的神秘错误：TypeError'用户'对象不可调用

回答

相关问题