折腾：
［记录］如何在Flask中实现记住微信公众号的用户帐户的登录状态
期间，用代码：
@app.before_request def before_request(): “”” 这里是全局的方法，在请求开始之前调用。 其中 flask 有个全局的变量 g，它是和 session 一样的用途，可以使用它来保存当前用户的数据 Returns: “”” gLog.debug(“g=%s”, g) pass def login_required(f): @wraps(f) def decorated_function(*args, **kwargs): if g.user is None: return redirect(url_for(‘login’, next=request.url)) return f(*args, **kwargs) return decorated_function |
结果运行出错：
DEBUG in views [/root/html/SIPEvents/sipevents/views.py:368]: g=<flask.g of ‘sipevents’> <div–<—————————————————————————— [2016-09-01 17:57:47 +0000] [11963] [ERROR] Error handling request / Traceback (most recent call last): File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 135, in handle self.handle_request(listener, req, client, addr) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/gunicorn/workers/sync.py”, line 176, in handle_request respiter = self.wsgi(environ, resp.start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 2000, in __call__ return self.wsgi_app(environ, start_response) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1991, in wsgi_app response = self.make_response(self.handle_exception(e)) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1567, in handle_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1988, in wsgi_app response = self.full_dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1641, in full_dispatch_request rv = self.handle_user_exception(e) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1544, in handle_user_exception reraise(exc_type, exc_value, tb) File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1639, in full_dispatch_request rv = self.dispatch_request() File “/root/Envs/SIPEvents/lib/python2.7/site-packages/flask/app.py”, line 1625, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File “/root/html/SIPEvents/sipevents/views.py”, line 732, in decorated_function if g.user is None: File “/root/Envs/SIPEvents/lib/python2.7/site-packages/werkzeug/local.py”, line 343, in __getattr__ return getattr(self._get_current_object(), name) AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘user’ |
搜：
AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘user’
python – AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘user’ in Flask – Stack Overflow
@app.before_request def before_request(): g.user = current_user |
python – AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘db’ – Stack Overflow
python – AttributeError: ‘_RequestGlobals’ object has no attribute ‘user’ – Stack Overflow
“The g globals are per request, not per server. The next request g is empty again.”
“Starting with Flask 0.10 this is stored on the application context and no longer on the request context which means it becomes available if only the application context is bound and not yet a request.
user = getattr(flask.g, ‘user’, None)
user = flask.g.get(‘user’, None)”
看 flask 教程中遇到的问题(二） – 学习空间 – 博客频道 – CSDN.NET
【已解决】跟着做flask小博客项目报错：AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘db’ – 实验楼问答 – 实验楼
flask – AttributeError: ‘User’ object has no attribute ‘is_active’ – Stack Overflow – Recalll
［已解决］Flask-Login出错：NameError: global name ‘current_user’ is not defined
［总结］
此处在login_required中使用：
if g.user is None: |
出错：
AttributeError: ‘_AppCtxGlobals’ object has no attribute ‘user’
的原因是：
此处，g中没有user这个属性
根本原因在于：
没有最开始去赋值
所以解决办法就是：
在开始用之前就赋值
而此处有个全局的before_request
把对应的赋值代码加入到那里，即可：
@app.before_request def before_request(): “”” 这里是全局的方法，在请求开始之前调用。 其中 flask 有个全局的变量 g，它是和 session 一样的用途，可以使用它来保存当前用户的数据 Returns: “”” g.user = current_user gLog.debug(“g=%s”, g) pass |
－》
这样每次调用login_required之前就会通过before_request获取到对应的current_user给g.user
之后在login_required，以及其他路由router中，就可以使用g.user了。
注：
如果是未来避免崩溃出错，也可以用get去获取：
user = g.get(‘user’, None) |
或：
user = getattr(g, ‘user’, None) |
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