The Blueprint(url_prefix) parameter is not working when using nesting blueprint #4037
Description
Minimal example:
from flask import Flask, Blueprint
app = Flask(__name__)
parent = Blueprint('parent', __name__, url_prefix='/child')
child = Blueprint('child', __name__, url_prefix='/parent')
@child.get('/')
def index():
return 'hello'
parent.register_blueprint(child)
app.register_blueprint(parent)The output of flask routes:
$ flask routes
Endpoint Methods Rule
------------------ ------- -----------------------
parent.child.index GET /
static GET /static/<path:filename>
The URL rule should be /parent/child/ instead of /.
P.S. The URL prefix works fine if set the prefix by using register_blueprint(url_prefix).
Environment:
- Flask version: 2.0