AttributeError：'function'对象没有与'sqlalchemy''确认'的属性

Question

我正在修改cookiecutter Flask应用程序。这使用flask_login usermixin。

我有一个包含一个方法寄存器：

from myflaskapp.models.user import User 

if form.validate_on_submit() 
    new_user = User.query.filter_by(email=posted_email).first 
    if new_user: 
     if new_user.confirmed: 

的posted_email是表中没有，所以我认为没有值将被返回。为什么这不起作用？

myflaskapp.models.user：

from flask.ext.login import UserMixin 
from myflaskapp.extensions import db, bcrypt 
from myflaskapp.database import (
    Column, 
    Model, 
    ReferenceCol, 
    relationship, 
    SurrogatePK, 
) 



class User(UserMixin, SurrogatePK, Model): 

    __tablename__ = 'users' 
    username = Column(db.String(80), nullable=True) 
    email = Column(db.String(80), nullable=False) 
    #: The hashed password 
    password = Column(db.String(128), nullable=True) 
    created_at = Column(db.DateTime, nullable=False, default=dt.datetime.utcnow) 
    first_name = Column(db.String(30), nullable=True) 
    last_name = Column(db.String(30), nullable=True) 
    active = Column(db.Boolean(), default=False) 
    admin = Column(db.Boolean(), default=False) 
    confirmed = db.Column(db.Boolean, default=False) 
    confirmed_on = db.Column(db.DateTime, nullable=True) 

>>> User.query.filter_by(email=posted_email).first 
<bound method BaseQuery.first of <flask_sqlalchemy.BaseQuery object at 0x03DF4FF0>> 
>>> User.query.filter_by(email=posted_email) 
<flask_sqlalchemy.BaseQuery object at 0x03DF4030> 
>>> new_user = User.query.filter_by(email=posted_email).first 
>>> type(new_user) 
<type 'instancemethod'> 

回溯：

Traceback (most recent call last): 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1836, in __call__ 
    return self.wsgi_app(environ, start_response) 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1820, in wsgi_app 
    response = self.make_response(self.handle_exception(e)) 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1403, in handle_exception 
    reraise(exc_type, exc_value, tb) 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1817, in wsgi_app 
    response = self.full_dispatch_request() 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request 
    rv = self.handle_user_exception(e) 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1381, in handle_user_exception 
    reraise(exc_type, exc_value, tb) 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request 
    rv = self.dispatch_request() 
File "C:\envs\virtalenvs\flask_mini\lib\site-packages\flask_debugtoolbar\__init__.py", line 124, in dispatch_request 
    return view_func(**req.view_args) 
File "C:\envs\r2\mini\myflaskapp\views\public.py", line 73, in register 
    if new_user.confirmed: 

AttributeError的： '功能' 对象有没有属性 '证实'

Answer 1

你需要调用first()，它是方法：

new_user = User.query.filter_by(email=posted_email).first()