Include YAML path with Device validation errors

src/pvi/device.py

@@ -19,6 +19,7 @@
     BaseModel,
     ConfigDict,
     Field,
+    ValidationError,
     field_validator,
     model_validator,
 )
@@ -463,7 +464,11 @@ def deserialize(cls, yaml: Path) -> Device:
 
         """
         serialized = cls.validate_yaml(yaml)
-        return cls(**serialized)
+        try:
+            return cls(**serialized)
+        except ValidationError:
+            print(f"\nFailed to validate `{yaml}` as Device:\n")
+            raise
 
     def deserialize_parents(self, yaml_paths: list[Path]):
         """Populate Device with Components from Device yaml of parent classes.

tests/bad.pvi.device.yaml

@@ -0,0 +1,9 @@
+label: label
+parent: parent
+children:
+
+- type: SignalR
+  name: OutA
+  red_pv: OUTA
+  read_widget:
+    type: LED

tests/test_device_serialization.py

@@ -55,6 +55,7 @@ def device():
 
 
 DEVICE_YAML = Path(__file__).parent / "test.pvi.device.yaml"
+BAD_DEVICE_YAML = Path(__file__).parent / "bad.pvi.device.yaml"
 
 
 def test_serialize(device: Device):
@@ -72,6 +73,11 @@ def test_deserialize(device: Device):
     assert d == device
 
 
+def test_deserialize_raises():
+    with pytest.raises(ValidationError):
+        Device.deserialize(BAD_DEVICE_YAML)
+
+
 def test_validate_fails():
     class NotTypedModel(BaseModel):
         pass