core: fix error when raising SkipObject in mapping (#10153)

* core: fix error when raising SkipObject in mapping

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

* fix events not being saved

thanks tests

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/core/expression/evaluator.py

@@ -76,8 +76,11 @@ class PropertyMappingEvaluator(BaseEvaluator):
         )
         if "request" in self._context:
             req: PolicyRequest = self._context["request"]
-            event.from_http(req.http_request, req.user)
+            if req.http_request:
-            return
+                event.from_http(req.http_request, req.user)
+                return
+            elif req.user:
+                event.set_user(req.user)
         event.save()
 
     def evaluate(self, *args, **kwargs) -> Any:

authentik/core/expression/exceptions.py

@@ -16,3 +16,7 @@ class SkipObjectException(PropertyMappingExpressionException):
     """Exception which can be raised in a property mapping to skip syncing an object.
     Only applies to Property mappings which sync objects, and not on mappings which transitively
     apply to a single user"""
+
+    def __init__(self) -> None:
+        # For this class only, both of these are set by the function evaluating the property mapping
+        super().__init__(exc=None, mapping=None)

authentik/lib/sync/mapper.py

@@ -4,7 +4,10 @@ from django.db.models import QuerySet
 from django.http import HttpRequest
 
 from authentik.core.expression.evaluator import PropertyMappingEvaluator
-from authentik.core.expression.exceptions import PropertyMappingExpressionException
+from authentik.core.expression.exceptions import (
+    PropertyMappingExpressionException,
+    SkipObjectException,
+)
 from authentik.core.models import PropertyMapping, User
 
 
@@ -57,6 +60,10 @@ class PropertyMappingManager:
             mapping.set_context(user, request, **kwargs)
             try:
                 value = mapping.evaluate(mapping.model.expression)
+            except SkipObjectException as exc:
+                exc.exc = exc
+                exc.mapping = mapping
+                raise exc from exc
             except PropertyMappingExpressionException as exc:
                 raise exc from exc
             except Exception as exc: