Flask: getting url_prefix for blueprint in view

Question

I have a blueprint with one view. I would like to get url_prefix of blueprint inside view. Unfortunately test.url_prefix returns None. Is there any other way?

app.register_blueprint(test_blueprint, url_prefix = "/test")

@test.route("/task", methods=["GET"])
def task_view(user):
    task_url = test.url_prefix + "/task" # test.url_prefix is None ??

Answer 1

Yes.

In Flask the route path of the current view is contained in the url_rule.rule subproperty of the request variable.

So you can do the following:

from flask import request

...

test_blueprint = Blueprint('test', __name__, url_prefix='/test')

...

@test_blueprint.route("/task", methods=["GET"])
def task_view(user):
    task_url = request.url_rule.rule

....

app.register_blueprint(test_blueprint)

The value of task_url will be:

/test/task

as desired.