Я новичок в программировании на Python, но сразу же начал экспериментировать с flask. У меня проблемы с расширением flask-login. Здесь я создаю простое приложение - блог. Этот блог будет использоваться только одним человеком.
Я не могу понять, почему декоратор user_loader не работает, который определен в models.py. Я получаю исключение: объект NoneType приложения не может быть вызван. Моя структура приложения такая
.
|-- app
| |-- admin
| | |-- __init__.py
| | |-- static
| | |-- templates
| | `-- views.py
| |-- config.py
| |-- __init__.py
| |-- main
| | |-- __init__.py
| | |-- static
| | |-- templates
| | `-- views.py
| `-- models.py
`-- launch.py
app. init
from flask import Flask
from main import main
from admin import admin
from flask.ext.script import Manager
from .config import config
from flask_debugtoolbar import DebugToolbarExtension
from flask.ext.sqlalchemy import SQLAlchemy
from sqlalchemy import Column
from flask_bootstrap import Bootstrap
from flask.ext.moment import Moment
from flask.ext.login import LoginManager
app_myblog=Flask(__name__)
app_myblog.debug=True
app_myblog.config.from_object(config)
app_myblog.register_blueprint(main)
app_myblog.register_blueprint(admin,url_prefix="/admin"
toolbar=DebugToolbarExtension(app_myblog)
manager=Manager(app_myblog)
db=SQLAlchemy(app_myblog)
Bootstrap(app_myblog)
moment=Moment(app_myblog)
login_manager=LoginManager()
login_manager.init_app(app_myblog)
login_manager.session_protection='strong'
login_manager.login_view='admin.login'
В app.models я определил класс User, который не загружает пользователей из базы данных. Фактически он просто загружает пользователя из конфигурации. В том же файле я также определил обратный вызов user_loader
class User(UserMixin):
def __init__(self):
self.id='1'
self.name=app_myblog.config['USERNAME']
self.password=app_myblog.config['PASSWORD']
def get_id(self):
return unicode(id)
@login_manager.user_loader
def load_user(userid):
u=User()
if u.get_id()==userid:
return u
else:
return None
admin. init
from flask import Blueprint
admin=Blueprint('admin',__name__,template_folder='templates',static_folder='static')
from . import views
admin.views
from flask import render_template,request,redirect,url_for
from . import admin
from flask.ext.login import login_required,login_user
from flask_wtf.form import Form
from wtforms import StringField,PasswordField,SubmitField
from ..models import User
class LoginForm(Form):
username=StringField('Username')
password=PasswordField('Password')
submit=SubmitField('Login')
@admin.route('/')
@login_required
def index():
return render_template('admin_home.html')
@admin.route('/login',methods=['GET','POST'])
def login():
form=LoginForm()
if form.validate_on_submit():
login_user(User())
nextx = request.args.get('next')
return redirect(nextx or url_for('admin.index'))
return render_template('admin_login.html',form=form)
Всякий раз, когда я запускаю маршруты, которые имеют login_required, я получаю ошибку TypeError: объект «NoneType» не вызывается. Вот трассировка.
Traceback (most recent call last):
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_debugtoolbar/__init__.py", line 125, in dispatch_request
return view_func(**req.view_args)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 756, in decorated_view
elif not current_user.is_authenticated():
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/werkzeug/local.py", line 338, in __getattr__
return getattr(self._get_current_object(), name)
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/werkzeug/local.py", line 297, in _get_current_object
return self.__local()
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 46, in <lambda>
current_user = LocalProxy(lambda: _get_user())
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 794, in _get_user
current_app.login_manager._load_user()
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 363, in _load_user
return self.reload_user()
File "/home/shivam/Workspaces/PythonWorkSpace/MyBlog/venv/lib/python2.7/site-packages/flask_login.py", line 325, in reload_user
user = self.user_callback(user_id)
TypeError: 'NoneType' object is not callable
