File extraction error: 'ChatOllama' object has no attribute 'model_name'

[ram0x7bc]

When processing an uploaded PDF in LLM Graph Builder version 0.8.1, the following occurs when using ollama on the backend. No documents can be processed:

16f72ce7654e 2025-05-13 03:06:44,087 - File Failed in extraction: 'ChatOllama' object has no attribute 'model_name'
16f72ce7654e Traceback (most recent call last):
16f72ce7654e   File "/code/score.py", line 243, in extract_knowledge_graph_from_file
16f72ce7654e     uri_latency, result = await extract_graph_from_file_local_file(uri, userName, password, database, model, merged_file_path, file_name, allowedNodes, allowedRelationship, token_chunk_size, chunk_overlap, chunks_to_combine, retry_condition, additional_instructions)
16f72ce7654e   File "/code/src/main.py", line 244, in extract_graph_from_file_local_file
16f72ce7654e     return await processing_source(uri, userName, password, database, model, fileName, [], allowedNodes, allowedRelationship, token_chunk_size, chunk_overlap, chunks_to_combine, True, merged_file_path, retry_condition, additional_instructions=additional_instructions)
16f72ce7654e   File "/code/src/main.py", line 389, in processing_source
16f72ce7654e     node_count,rel_count,latency_processed_chunk = await processing_chunks(selected_chunks,graph,uri, userName, password, database,file_name,model,allowedNodes,allowedRelationship,chunks_to_combine,node_count, rel_count, additional_instructions)
16f72ce7654e   File "/code/src/main.py", line 484, in processing_chunks
16f72ce7654e     graph_documents =  await get_graph_from_llm(model, chunkId_chunkDoc_list, allowedNodes, allowedRelationship, chunks_to_combine, additional_instructions)
16f72ce7654e   File "/code/src/llm.py", line 214, in get_graph_from_llm
16f72ce7654e     graph_document_list = await get_graph_document_list(
16f72ce7654e   File "/code/src/llm.py", line 184, in get_graph_document_list
16f72ce7654e     model_name = llm.model_name.lower()
16f72ce7654e   File "/usr/local/lib/python3.10/site-packages/pydantic/main.py", line 891, in __getattr__
16f72ce7654e     raise AttributeError(f'{type(self).__name__!r} object has no attribute {item!r}')
16f72ce7654e AttributeError: 'ChatOllama' object has no attribute 'model_name'. Did you mean: 'model_dump'?

I ran the application outside of the container and added some addtional logging to get a better look at the flow, but it is pretty simple:

llm = ChatOllama(base_url=base_url, model=model_name)

The 'model' attribute is assigned and there is no 'model_name' attribute. Langchain documentation says to use the 'model' attribute.

Calling model_name = llm.model_name.lower() causes the error because it is acting on the 'model_name' attribute instead of 'model' attribute.

[kaustubh-darekar]

@ram0x7bc thank you for raising this bug.

this was happening due to different ways to get model name, now it has been addressed in #1286