Harikrishna KP 4e44262499 test(python): add regression test for nullable struct with None (#2654) (#3483) ...

## Summary

Regression test for [issue
#2654](https://github.com/lancedb/lancedb/issues/2654) — a nullable
struct column whose first batch contains only `None` values crashed in
`_align_field_types` with `AttributeError: 'pyarrow.lib.DataType' object
has no attribute 'fields'`.

The actual fix landed in #3394, but no test was added. This PR adds the
reproducer from the issue as a test.

## Test plan

- `test_add_nullable_struct_with_none`: creates a table with a nullable
struct column, adds a row with a non-null struct value, then a row with
`None` for the struct field. Verifies both rows land correctly.
- Uses Lance file format v2.1 (`new_table_data_storage_version="2.1"`)
because nullable structs aren't supported on v2.0.

## Related

- #3028 (the original fix attempt, now superseded)

2026-06-03 14:13:09 -07:00

..

lancedb

fix(rerankers): guard against empty vector_results in RRFReranker.rerank_multivector (#3467)

2026-06-03 14:06:33 -07:00

tests

test(python): add regression test for nullable struct with None (#2654) (#3483)

2026-06-03 14:13:09 -07:00