Flask: 'AnonymousUserMixin' object has no attribute' can'

the environmental background of the problems and what methods you have tried

there is a problem with role verification. The role verification code current_user.can (Permission.WRITE_ARTICLES) and deletes that the website can run, but role verification is still invalid.

related codes

models partial code:

def can(self, permissions):
    return self.role is not None and (self.role.permissions & permissions) 

 == permissions

    def is_administrator(self):
        return self.can(Permission.ADMINISTER)
    def __repr__(self):
        return "<User %r>" % self.username
class AnonymousUser(AnonymousUserMixin):
    def can(self, permissions):
        return False
    def is_administrator(self):
        return False
login_manager.anonymous_user = AnonymousUser

View function part code:

@main.route("/", methods=["GET", "POST"])
def index():
    form = PostForm()
    if current_user.can(Permission.WRITE_ARTICLES) and form.validate_on_submit():
        post = Post(body=form.body.data,
                    author=current_user._get_current_object())
        db.session.add(post)
        db.session.commit()
        return redirect(url_for(".index"))
    page = request.args.get("page", 1, type=int)

    show_followed = False
    if current_user.is_authenticated:
        show_followed = bool(request.cookies.get("show_followed", ""))
    if show_followed:
        query = current_user.followed_posts
    else:
        query = Post.query
    pagination = Post.query.order_by(Post.timestamp.desc()).paginate(page, per_page=current_app.config["FLASKY_POSTS_PER_PAGE"],error_out=False)
    posts = pagination.items
    return render_template("index.html", form=form, posts=posts, show_followed=show_followed, pagination=pagination,current_time=dateti

Test part of the code (the test can pass):

    def test_user_role(self):
        u = User(email="john@example.com", password="cat")
        self.assertTrue(u.can(Permission.FOLLOW))
        self.assertTrue(u.can(Permission.COMMENT))
        self.assertTrue(u.can(Permission.WRITE_ARTICLES))

flask appears AttributeError: "AnonymousUserMixin" object has no attribute" can" when running without logging in to the home page. If you log in to u.can () the role verification function fails, there is the following code in the home page:

{% if current_user.can(Permission.WRITE) %}{{ wtf.quick_form(form) }}{% endif %}

but it didn"t work

Python

Nov.24,2021