catch InvalidFieldValue and raise ParsingError during context config generation (#12758)

Author: MichelleArk

.changes/unreleased/Fixes-20260331-224946.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: catch InvalidFieldValue and raise ParsingError during context config generation
+time: 2026-03-31T22:49:46.804326-04:00
+custom:
+    Author: michelleark
+    Issue: "12758"

core/dbt/context/context_config.py

@@ -3,10 +3,12 @@
 from dataclasses import dataclass
 from typing import Any, Dict, Generic, Iterator, List, Optional, TypeVar
 
+from mashumaro.exceptions import InvalidFieldValue
+
 from dbt.adapters.factory import get_config_class_by_name
 from dbt.config import IsFQNResource, Project, RuntimeConfig
 from dbt.contracts.graph.model_config import get_config_for
-from dbt.exceptions import SchemaConfigError
+from dbt.exceptions import ParsingError, SchemaConfigError
 from dbt.flags import get_flags
 from dbt.node_types import NodeType
 from dbt.utils import fqn_search
@@ -223,7 +225,11 @@ def _update_from_config(self, result: C, partial: Dict[str, Any], validate: bool
         adapter_type = self._active_project.credentials.type
         adapter_config_cls = get_config_class_by_name(adapter_type)
 
-        updated = result.update_from(translated, adapter_config_cls, validate=validate)
+        try:
+            updated = result.update_from(translated, adapter_config_cls, validate=validate)
+        except InvalidFieldValue as e:
+            raise ParsingError(str(e))
+
         return updated
 
     def translate_hook_names(self, project_dict):

tests/functional/exposures/test_exposure_configs.py

@@ -1,6 +1,7 @@
 import pytest
 
 from dbt.artifacts.resources import ExposureConfig
+from dbt.exceptions import ParsingError
 from dbt.tests.util import get_manifest, run_dbt, update_config_file
 from dbt_common.dataclass_schema import ValidationError
 from tests.functional.exposures.fixtures import (
@@ -162,10 +163,9 @@ def project_config_update(self):
         return {"exposures": {"tags": None}}
 
     def test_null_exposure_tags_raises_invalid_field_value(self, project):
-        from mashumaro.exceptions import InvalidFieldValue
 
         with pytest.raises(
-            InvalidFieldValue,
+            ParsingError,
             match='Field "tags" of type List\[str\] in ExposureConfig has invalid value None',  # noqa: [W605]
         ):
             run_dbt(["parse"])