feat(api): add MM get_by_attrs route

Gets the first model that matches the given name, base and type. Raises 404 if there isn't one.

This will be used for backwards compatibility with old metadata.

invokeai/app/api/routers/model_manager.py

@@ -165,6 +165,27 @@ async def list_model_records(
     return ModelsList(models=found_models)
 
 
+@model_manager_router.get(
+    "/get_by_attrs",
+    operation_id="get_model_records_by_attrs",
+    response_model=AnyModelConfig,
+)
+async def get_model_records_by_attrs(
+    name: str = Query(description="The name of the model"),
+    type: ModelType = Query(description="The type of the model"),
+    base: BaseModelType = Query(description="The base model of the model"),
+) -> AnyModelConfig:
+    """Gets a model by its attributes. The main use of this route is to provide backwards compatibility with the old
+    model manager, which identified models by a combination of name, base and type."""
+    configs = ApiDependencies.invoker.services.model_manager.store.search_by_attr(
+        base_model=base, model_type=type, model_name=name
+    )
+    if not configs:
+        raise HTTPException(status_code=404, detail="No model found with these attributes")
+
+    return configs[0]
+
+
 @model_manager_router.get(
     "/i/{key}",
     operation_id="get_model_record",