def extra_permissions(permission_classes):
"""Decorate a CBV method to add specific permissions on the instance."""
def decorator(func):
def decorated_func(self, *args, **kwargs):
for permission_class in permission_classes:
# Check the extra view level permissions.
permission = permission_class()
if not permission.has_permission(self.request, self):
self.permission_denied(
self.request,
message=getattr(permission, "message", None),
code=getattr(permission, "code", None)
)
# Add them to permission classes for obj level checks.
# Reassignment is for global tests as they call the same CBV
intances.
self.permission_classes = self.permission_classes +
[permission_class]
return func(self, *args, **kwargs)
return decorated_func
return decorator
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