Remove "instance" field in serialization of linkml validation errors

src/dandisets_linkml_status_tools/cli/models.py

@@ -1,19 +1,11 @@
 from datetime import datetime
-from typing import Any
+from typing import Annotated, Any
 
 from dandi.dandiapi import VersionStatus
 from linkml.validator.report import ValidationResult
-from pydantic import BaseModel, Json, TypeAdapter
+from pydantic import BaseModel, Json, PlainSerializer, TypeAdapter
 from typing_extensions import TypedDict  # Required for Python < 3.12 by Pydantic
 
-DandisetMetadataType = dict[str, Any]
-PydanticValidationErrsType = list[dict[str, Any]]
-LinkmlValidationErrsType = list[ValidationResult]
-
-dandiset_metadata_adapter = TypeAdapter(DandisetMetadataType)
-pydantic_validation_errs_adapter = TypeAdapter(PydanticValidationErrsType)
-linkml_validation_errs_adapter = TypeAdapter(LinkmlValidationErrsType)
-
 # A `TypedDict` that has a key corresponding to each field in `ValidationResult`
 # except for the `instance` field
 TrimmedValidationResult = TypedDict(
@@ -26,6 +18,36 @@
 )
 
 
+def trim_validation_results(
+    errs: list[ValidationResult],
+) -> list[TrimmedValidationResult]:
+    """
+    Trim the `ValidationResult` objects in a list to exclude their `instance` field.
+
+    :param errs: The list of `ValidationResult` objects to be trimmed.
+
+    :return: The list of `TrimmedValidationResult` objects representing the trimmed
+        `ValidationResult` objects.
+    """
+    trimmed_errs = []
+    for err in errs:
+        err_as_dict = err.model_dump()
+        del err_as_dict["instance"]
+        trimmed_errs.append(err_as_dict)
+    return trimmed_errs
+
+
+DandisetMetadataType = dict[str, Any]
+PydanticValidationErrsType = list[dict[str, Any]]
+LinkmlValidationErrsType = Annotated[
+    list[ValidationResult], PlainSerializer(trim_validation_results)
+]
+
+dandiset_metadata_adapter = TypeAdapter(DandisetMetadataType)
+pydantic_validation_errs_adapter = TypeAdapter(PydanticValidationErrsType)
+linkml_validation_errs_adapter = TypeAdapter(LinkmlValidationErrsType)
+
+
 class DandisetValidationReport(BaseModel):
     """
     A report of validation results of a dandiset (metadata) against the