The data for app.url_map.converters is not passed to the blueprint

[pcloth]

Expected Behavior

I created a custom url regular handler, which works in the app.route, but does not take effect in the api.route of the blueprint. The error message is: File "d:\Anaconda3\lib\site-packages\ Werkzeug\routing.py", line 696, in get_converter      Raise LookupError('the converter %r does not exist' % converter_name) LookupError: the converter 'regex' does not exist ·

from werkzeug.routing import BaseConverter

class RegexConverter(BaseConverter):
    def __init__(self, map, *args):
        self.map = map
        self.regex = args[0]

app.url_map.converters['regex'] = RegexConverter

manager = Manager(app)

# Printed here has regex
print('\n\n',app.url_map.converters,'<---------------->',manager.app.url_map.converters,'\n\n')

But I printed it in routing.Rule.get_converter but there is no regex in self.map.converters

  {'default': <class 'werkzeug.routing.UnicodeConverter'>, 'string': <class 'werkzeug.routing.UnicodeConverter'>, 'any': <class 'werkzeug.routing.AnyConverter'>, 'path': <class 'werkzeug.routing.PathConverter'>, 'int': <class 'werkzeug.routing.IntegerConverter'>, 'float': <class 'werkzeug.routing.FloatConverter'>, 'uuid': <class 'werkzeug. routing.UUIDConverter'>}

Actual Behavior

The data for app.url_map.converters is not passed to the blueprint

Traceback (most recent call last):
  File "devServer.py", line 5, in <module>
    from manage import app
  File "D:\py3\ytt\manage.py", line 30, in <module>
    app = create_app('development')
  File "D:\py3\ytt\app\__init__.py", line 62, in create_app
    app.register_blueprint(api_bp)
  File "d:\Anaconda3\lib\site-packages\flask\app.py", line 66, in wrapper_func
    return f(self, *args, **kwargs)
  File "d:\Anaconda3\lib\site-packages\flask\app.py", line 1115, in register_blueprint
    blueprint.register(self, options, first_registration)
  File "d:\Anaconda3\lib\site-packages\flask\blueprints.py", line 187, in register
    deferred(state)
  File "d:\Anaconda3\lib\site-packages\flask\blueprints.py", line 208, in <lambda>
    s.add_url_rule(rule, endpoint, view_func, **options))
  File "d:\Anaconda3\lib\site-packages\flask\blueprints.py", line 80, in add_url_rule
    view_func, defaults=defaults, **options)
  File "d:\Anaconda3\lib\site-packages\flask\app.py", line 66, in wrapper_func
    return f(self, *args, **kwargs)
  File "d:\Anaconda3\lib\site-packages\flask\app.py", line 1216, in add_url_rule
    self.url_map.add(rule)
  File "d:\Anaconda3\lib\site-packages\werkzeug\routing.py", line 1217, in add
    rule.bind(self)
  File "d:\Anaconda3\lib\site-packages\werkzeug\routing.py", line 687, in bind
    self.compile()
  File "d:\Anaconda3\lib\site-packages\werkzeug\routing.py", line 741, in compile
    _build_regex(self.is_leaf and self.rule or self.rule.rstrip('/'))
  File "d:\Anaconda3\lib\site-packages\werkzeug\routing.py", line 730, in _build_regex
    variable, converter, c_args, c_kwargs)
  File "d:\Anaconda3\lib\site-packages\werkzeug\routing.py", line 696, in get_converter
    raise LookupError('the converter %r does not exist' % converter_name)
LookupError: the converter 'regex' does not exist

Environment

• Python version:3.6
• Flask version:1.02
• Werkzeug version:0.14.1

[ThiefMaster]

Sounds like you might be registering the blueprint before the custom rule is defined.

[pcloth]

@ThiefMaster thank you!