Flask-security: security.context_processor raises RecursionError

[LionelR]

I try to use flask_security with flask_admin, but at start up there's a problem with the context_processor:

File "/home/lionel/dev/knmx/knmx/launcher.py", line 6, in <module>
    from knmx.app import create_app
  File "/home/lionel/dev/knmx/knmx/app.py", line 92, in <module>
    @webui_security.context_processor
  File "/home/lionel/dev/knmx/venv/lib/python3.5/site-packages/flask_security/core.py", line 531, in __getattr__
    return getattr(self._state, name, None)
  File "/home/lionel/dev/knmx/venv/lib/python3.5/site-packages/flask_security/core.py", line 531, in __getattr__
    return getattr(self._state, name, None)
...
RecursionError: maximum recursion depth exceeded

My setup:

• app.py

from flask import Flask

from knmx import config
from knmx import security
from knmx.db import models
from knmx.views import api, admin, webui, schemas
def create_app(extra_config=None):
    app = Flask(__name__.split('.')[0])
    app.config.from_object(config.DefaultConfig)
    register_extensions(app=app)

def register_extensions(app):
    models.db.init_app(app=app)
    security.webui_security.init_app(app=app, datastore=security.user_datastore)
    security.jwt.init_app(app=app)
    admin.admin.init_app(app=app)

• security.py

from flask_security import Security, SQLAlchemyUserDatastore
from flask_jwt_extended import JWTManager
from knmx.db import models

webui_security = Security()
jwt = JWTManager()
user_datastore = SQLAlchemyUserDatastore(models.db, models.User, models.Role)

• admin.py

from flask import redirect, url_for, request, abort
from flask_admin import Admin
from flask_admin.contrib.sqla import ModelView
from flask_admin import helpers as admin_helpers
from flask_security import current_user
from knmx.db import models
from knmx.security import webui_security

admin = Admin()

@webui_security.context_processor
def security_context_processor():
    return dict(
        admin_base_template=admin.base_template,
        admin_view=admin.index_view,
        h=admin_helpers,
        get_url=url_for
    )

[BbsonLin]

Hi, @LionelR I also face the issue just like you.

I find out that in version 3.0.0's flask_security.Security init_app function is a little bit different from __init__.
It won't assign self._state when using init_app way, but it'll return state object for you.
So, I guess, that's why the getattr would never find context_processor attribute in self._state. 😢

For now, I found there are two ways to fix this issue,

• Using init_app return value

secur = security.webui_security.init_app(app=app, datastore=security.user_datastore)
@secur.context_processor
def security_context_processor():
...

• Get state object from app.extension after you init_app

security = app.extension['security']
@security.context_processor
def security_context_processor():
...

---

Or you can just use the develop branch code.
I saw someone add self._state = state = _get_state(app, datastore, **kwargs) to fix this problem.
(CODE LINK)

Hope it will help you.

[smn-snkl]

Any update on this? I still have the same issue (following @LionelR's approach) ...

[gharidev]

• I found this as a fix

security_state = security.init_app(app,user_datastore)
security._state = security_state

[jwag956]

Please consider moving to:
https://github.com/Flask-Middleware/flask-security

which is my updated and maintained fork. The fix mentioned above is there.

[big-vl]

i am use template:
{% set admin_base_template = security.admin_base_template %}
{% set admin_view = security.admin_view %}
{% set get_url = security.get_url %}
{% set h = security.h %}
{% extends 'admin/master.html' %}

use in:
security.init_app(app, user_datastore, admin_base_template=admin.base_template,
admin_view=admin.index_view,
h=admin_helpers,
get_url=url_for)

Work! Not use @...context_processor