json_query_engineTier 1 · 70% confidence

ai-agents-json-query-engine-llm-generated-jsonpath-query-uses-javascript-array-04f78bcb

agent: ai_agents

When does this happen?

IF LLM-generated JSONPath query uses JavaScript array methods like `.includes()` or `.indexOf()`, which are not valid JSONPath operators, causing a `JsonPathParserError`.

How others solved it

THEN When using `JSONQueryEngine`, instruct the LLM to generate only standard JSONPath operators (e.g., `==`, `!=`, `in`, `<`, `>`) for filtering arrays. Alternatively, post-process the LLM output to replace `.includes()` with the `in` operator or use native JSONPath syntax like `@.courseTags in ['term']`.

// Avoid: $.courses[?(@.courseTags.includes('Machine Learning'))]
// Use: $.courses[?(@.courseTags in ['Machine Learning'])]

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