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chore: standardize model not found error (#2964)

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# What does this PR do?
1. Creates a new `ModelNotFoundError` class
2. Implements the new class where appropriate 

Relates to #2379

Signed-off-by: Nathan Weinberg <nweinber@redhat.com>
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Nathan Weinberg 2025-07-30 15:19:53 -04:00 • committed by GitHub
parent 266e2afb9c
commit c5622c79de
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6 changed files with 23 additions and 10 deletions
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3
llama_stack/distribution/routing_tables/common.py
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@ -6,6 +6,7 @@
from typing import Any
from llama_stack.apis.common.errors import ModelNotFoundError
from llama_stack.apis.models import Model
from llama_stack.apis.resource import ResourceType
from llama_stack.apis.scoring_functions import ScoringFn
@ -257,7 +258,7 @@ async def lookup_model(routing_table: CommonRoutingTableImpl, model_id: str) ->
models = await routing_table.get_all_with_type("model")
matching_models = [m for m in models if m.provider_resource_id == model_id]
if len(matching_models) == 0:
raise ValueError(f"Model '{model_id}' not found")
raise ModelNotFoundError(model_id)
if len(matching_models) > 1:
raise ValueError(f"Multiple providers found for '{model_id}': {[m.provider_id for m in matching_models]}")