Use target_index_body for engine detection instead of radial_engine

[Likhoram]

Description

Use target_index_body for engine detection instead of radial_engine param.

Testing

Validated via unit tests. Template passthrough follows same pattern as radial_search_type which is already working in production.

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[github-actions]

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🧪 PR contains tests

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⚡ Recommended focus areas for review Possible Issue target_index_body is expected to be a file path (e.g., indices/faiss-index.json), but the detection logic only checks whether the substring lucene appears in that path string. If a user supplies a path that does not contain the engine name (e.g., indices/my-index.json for a Lucene index, or a custom filename), the engine will silently default to faiss, potentially running the benchmark against the wrong engine. Additionally, if target_index_body is not a string (e.g., None or a dict), the .lower() call will raise an AttributeError. Consider parsing the index body file contents to detect the engine, or validating the input type. index_body = params.get("target_index_body", "") if "lucene" in index_body.lower(): self.radial_engine = "lucene" else: self.radial_engine = "faiss"

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Guard against non-string index body values params.get("target_index_body", "") can return a non-string value (e.g., None or a dict) if the parameter is set to a non-default type, causing AttributeError on .lower(). Coerce to string before calling .lower() to make the detection robust. osbenchmark/workload/params.py [1167-1171] if self.radial_search_type: - index_body = params.get("target_index_body", "") + index_body = str(params.get("target_index_body") or "") if "lucene" in index_body.lower(): self.radial_engine = "lucene" else: self.radial_engine = "faiss" Suggestion importance[1-10]: 4 __ Why: The suggestion correctly identifies a potential AttributeError if target_index_body is None or a non-string type. However, in typical usage target_index_body is a file path string, so the practical impact is minor defensive coding.	Low