Method as_view

rest_framework/views.py:123–150

Store the original class on the view function. This allows us to discover information about the view when we do URL reverse lookups. Used for breadcrumb generation.

(cls, **initkwargs)

    @classmethod
    def as_view(cls, **initkwargs):
        """
        Store the original class on the view function.

        This allows us to discover information about the view when we do URL
        reverse lookups.  Used for breadcrumb generation.
        """
        if isinstance(getattr(cls, 'queryset', None), models.query.QuerySet):
            def force_evaluation():
                raise RuntimeError(
                    'Do not evaluate the `.queryset` attribute directly, '
                    'as the result will be cached and reused between requests. '
                    'Use `.all()` or call `.get_queryset()` instead.'
                )
            cls.queryset._fetch_all = force_evaluation

        view = super().as_view(**initkwargs)
        view.cls = cls
        view.initkwargs = initkwargs

        # Exempt all DRF views from Django's LoginRequiredMiddleware. Users should set
        # DEFAULT_PERMISSION_CLASSES to 'rest_framework.permissions.IsAuthenticated' instead
        if DJANGO_VERSION >= (5, 1):
            view.login_required = False

        # Note: session based authentication is explicitly CSRF validated,
        # all other authentication is CSRF exempt.
        return csrf_exempt(view)

    @property
    def allowed_methods(self):