La fonction _authenticate_with_backend était obsolète dans django auth.autenticate

Contexte

Mise à jour de la version Django de 1.11.1 à 2.2, J'ai commencé à recevoir une erreur d'authentification que j'avais moi-même personnalisée.

authentifier django 1.11.1

• https://docs.djangoproject.com/ja/1.11/_modules/django/contrib/auth/

def authenticate(request=None, **credentials):
    """
    If the given credentials are valid, return a User object.
    """
    for backend, backend_path in _get_backends(return_tuples=True):
        try:
            user = _authenticate_with_backend(backend, backend_path, request, credentials)
        except PermissionDenied:
            # This backend says to stop in our tracks - this user should not be allowed in at all.
            break
        if user is None:
            continue
        # Annotate the user object with the path of the backend.
        user.backend = backend_path
        return user

    # The credentials supplied are invalid to all backends, fire signal
    user_login_failed.send(sender=__name__, credentials=_clean_credentials(credentials), request=request)



def _authenticate_with_backend(backend, backend_path, request, credentials):
    args = (request,)
    # Does the backend accept a request argument? <---Quel est ce commentaire?
    try:
        inspect.getcallargs(backend.authenticate, request, **credentials)
    except TypeError:
        args = ()
        credentials.pop('request', None)
        # Does the backend accept a request keyword argument?
        try:
            inspect.getcallargs(backend.authenticate, request=request, **credentials)
        except TypeError:
            # Does the backend accept credentials without request?
            try:
                inspect.getcallargs(backend.authenticate, **credentials)
            except TypeError:
                # This backend doesn't accept these credentials as arguments. Try the next one.
                return None
            else:
                warnings.warn(
                    "Update %s.authenticate() to accept a positional "
                    "`request` argument." % backend_path,
                    RemovedInDjango21Warning
                )
        else:
            credentials['request'] = request
            warnings.warn(
                "In %s.authenticate(), move the `request` keyword argument "
                "to the first positional argument." % backend_path,
                RemovedInDjango21Warning
            )
    return backend.authenticate(*args, **credentials)

↓ Authentification personnalisée

from django.contrib.auth.backends import ModelBackend
from .models import UserProfile


class SignedRequestBackend(ModelBackend):
    """Implémentation d'un backend d'authentification directe pour une authentification séparée"""

    def authenticate(self, user=None, user_profile=None, **kwds):
        if user is None:
            return
        if not user.is_authenticated or not user.is_active:
            return
        if municipality_user_profile is None:
            return
        if not isinstance(user_profile, UserProfile):
            return
        if user.id != user_profile.user_id:
            return
        return user

django 2.2 authentifier

• https://docs.djangoproject.com/ja/2.2/_modules/django/contrib/auth/

def authenticate(request=None, **credentials):
    """
    If the given credentials are valid, return a User object.
    """
    for backend, backend_path in _get_backends(return_tuples=True):
        try:
            inspect.getcallargs(backend.authenticate, request, **credentials)
        except TypeError:
            # This backend doesn't accept these credentials as arguments. Try the next one.
            continue
        try:
            user = backend.authenticate(request, **credentials)
        except PermissionDenied:
            # This backend says to stop in our tracks - this user should not be allowed in at all.
            break
        if user is None:
            continue
        # Annotate the user object with the path of the backend.
        user.backend = backend_path
        return user

    # The credentials supplied are invalid to all backends, fire signal
    user_login_failed.send(sender=__name__, credentials=_clean_credentials(credentials), request=request)

[Conclusion] La fonction _authenticate_with_backend a été supprimée.

J'ai essayé de déboguer inspect.getcallargs

• https://github.com/python/cpython/blob/3.8/Lib/inspect.py#L1335

[Cause de l'erreur] ['self', 'user', 'user_profile'] est assigné à args (veuillez entrer ['self', 'request'] ici)

--Ah, il y a eu un commentaire ... # Le backend accepte-t-il un argument de requête? --Définissez request dans l'argument d'authentification que vous avez fait → L'erreur a été résolue.