import_from_source fails when no parents column is present.

[Zethson]

Context: https://laminlabs.slack.com/archives/C04MU979KD3/p1730300809261839

bt.Disease.import_from_source()

where the source is not mondo but ICD9

-->
{
	"name": "KeyError",
	"message": "\"['parents'] not found in axis\"",
	"stack": "---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
Cell In[7], line 1
----> 1 bt.Disease.import_from_source()

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/bionty/models.py:241, in BioRecord.import_from_source(cls, source, ontology_ids, organism, ignore_conflicts)
    238 from .core._add_ontology import add_ontology_from_df, check_source_in_db
    240 if hasattr(cls, \"ontology_id\"):
--> 241     add_ontology_from_df(
    242         registry=cls,
    243         ontology_ids=ontology_ids,
    244         organism=organism,
    245         source=source,
    246         ignore_conflicts=ignore_conflicts,
    247     )
    248 else:
    249     import lamindb as ln

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/bionty/core/_add_ontology.py:173, in add_ontology_from_df(registry, ontology_ids, organism, source, ignore_conflicts)
    164 n_in_db = all_records.count()
    166 check_source_in_db(
    167     registry=registry,
    168     source=source_record,
    169     n_all=n_all,
    170     n_in_db=n_in_db,
    171 )
--> 173 records = create_records(registry, df_new, source_record)
    174 new_records = [r for r in records if r._state.adding]
    175 if ontology_ids is None:

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/bionty/core/_add_ontology.py:53, in create_records(registry, df, source_record)
     45 def create_records(
     46     registry: Type[BioRecord], df: pd.DataFrame, source_record: Source
     47 ) -> List[Record]:
     48     import lamindb as ln
     50     df_records = (
     51         df.reset_index()
     52         .rename(columns={\"definition\": \"description\"})
---> 53         .drop(columns=[\"parents\"])
     54         .to_dict(orient=\"records\")
     55     )
     56     try:
     57         ln.settings.creation.search_names = False

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/pandas/core/frame.py:5581, in DataFrame.drop(self, labels, axis, index, columns, level, inplace, errors)
   5433 def drop(
   5434     self,
   5435     labels: IndexLabel | None = None,
   (...)
   5442     errors: IgnoreRaise = \"raise\",
   5443 ) -> DataFrame | None:
   5444     \"\"\"
   5445     Drop specified labels from rows or columns.
   5446 
   (...)
   5579             weight  1.0     0.8
   5580     \"\"\"
-> 5581     return super().drop(
   5582         labels=labels,
   5583         axis=axis,
   5584         index=index,
   5585         columns=columns,
   5586         level=level,
   5587         inplace=inplace,
   5588         errors=errors,
   5589     )

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/pandas/core/generic.py:4788, in NDFrame.drop(self, labels, axis, index, columns, level, inplace, errors)
   4786 for axis, labels in axes.items():
   4787     if labels is not None:
-> 4788         obj = obj._drop_axis(labels, axis, level=level, errors=errors)
   4790 if inplace:
   4791     self._update_inplace(obj)

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/pandas/core/generic.py:4830, in NDFrame._drop_axis(self, labels, axis, level, errors, only_slice)
   4828         new_axis = axis.drop(labels, level=level, errors=errors)
   4829     else:
-> 4830         new_axis = axis.drop(labels, errors=errors)
   4831     indexer = axis.get_indexer(new_axis)
   4833 # Case for non-unique axis
   4834 else:

File ~/miniconda3/envs/pertpy/lib/python3.12/site-packages/pandas/core/indexes/base.py:7070, in Index.drop(self, labels, errors)
   7068 if mask.any():
   7069     if errors != \"ignore\":
-> 7070         raise KeyError(f\"{labels[mask].tolist()} not found in axis\")
   7071     indexer = indexer[~mask]
   7072 return self.delete(indexer)

KeyError: \"['parents'] not found in axis\""
}