Method as_view

src/flask/views.py:86–135

Convert the class into a view function that can be registered for a route. By default, the generated view will create a new instance of the view class for every request and call its :meth:`dispatch_request` method. If the view class sets :attr:`init_every_req

(
        cls, name: str, *class_args: t.Any, **class_kwargs: t.Any
    )

    @classmethod
    def as_view(
        cls, name: str, *class_args: t.Any, **class_kwargs: t.Any
    ) -> ft.RouteCallable:
        class="st">"""Convert the class into a view function that can be registered
        for a route.

        By default, the generated view will create a new instance of the
        view class for every request and call its
        :meth:`dispatch_request` method. If the view class sets
        :attr:`init_every_request` to ``False``, the same instance will
        be used for every request.

        Except for ``name``, all other arguments passed to this method
        are forwarded to the view class ``__init__`` method.

        .. versionchanged:: 2.2
            Added the ``init_every_request`` class attribute.
        class="st">"""
        if cls.init_every_request:

            def view(**kwargs: t.Any) -> ft.ResponseReturnValue:
                self = view.view_class(  class="cm"># type: ignore[attr-defined]
                    *class_args, **class_kwargs
                )
                return current_app.ensure_sync(self.dispatch_request)(**kwargs)  class="cm"># type: ignore[no-any-return]

        else:
            self = cls(*class_args, **class_kwargs)  class="cm"># pyright: ignore

            def view(**kwargs: t.Any) -> ft.ResponseReturnValue:
                return current_app.ensure_sync(self.dispatch_request)(**kwargs)  class="cm"># type: ignore[no-any-return]

        if cls.decorators:
            view.__name__ = name
            view.__module__ = cls.__module__
            for decorator in cls.decorators:
                view = decorator(view)

        class="cm"># We attach the view class to the view function for two reasons:
        class="cm"># first of all it allows us to easily figure out what class-based
        class="cm"># view this thing came from, secondly it's also used for instantiating
        class="cm"># the view class so you can actually replace it with something else
        class="cm"># for testing purposes and debugging.
        view.view_class = cls  class="cm"># type: ignore
        view.__name__ = name
        view.__doc__ = cls.__doc__
        view.__module__ = cls.__module__
        view.methods = cls.methods  class="cm"># type: ignore
        view.provide_automatic_options = cls.provide_automatic_options  class="cm"># type: ignore
        return view


class MethodView(View):