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fix: convert schema metadata to strings for JsonArrowSchema (#2786)

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Fixes pydantic validation errors when creating materialized views with
namespace.

```
>       return JsonArrowSchema(fields=fields, metadata=schema.metadata)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       pydantic_core._pydantic_core.ValidationError: 4 validation errors for JsonArrowSchema
E       metadata.b'geneva::view::query'
E         Input should be a valid string [type=string_type, input_value=b'{"base":{"vector_column...t-image:latest\\"}"}}]}', input_type=bytes]
E           For further information visit https://errors.pydantic.dev/2.12/v/string_type
```
This commit is contained in:
Ryan Green
2025-11-17 13:18:20 -03:30
committed by GitHub
parent bbd44e669d
commit 92dbec1f95
1 changed files with 8 additions and 1 deletions
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9
python/python/lancedb/namespace.py
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@@ -99,7 +99,14 @@ def _convert_pyarrow_schema_to_json(schema: pa.Schema) -> JsonArrowSchema:
)
fields.append(json_field)
return JsonArrowSchema(fields=fields, metadata=schema.metadata)
# decode binary metadata to strings for JSON
meta = None
if schema.metadata:
meta = {
k.decode("utf-8"): v.decode("utf-8") for k, v in schema.metadata.items()
}
return JsonArrowSchema(fields=fields, metadata=meta)
class LanceNamespaceStorageOptionsProvider(StorageOptionsProvider):