[Solved] You have a nested field comments but your nested query returns no results. What is a likely cause? - Ans: The query is missing the nested path parameter | Elasticsearch

Elasticsearch - Mappings and Data Types

You have a nested field comments but your nested query returns no results. What is a likely cause?

AThe query uses a term query instead of match

BThe field is defined as object, not nested

CThe index has no documents

DThe query is missing the nested path parameter

Step-by-Step Solution

Solution:

Step 1: Check nested query requirements
Nested queries must include the correct path parameter to target the nested field.
Step 2: Analyze other options
While B could cause issues, the question states nested field exists. C and D are less likely to cause no results specifically.
Final Answer:
Missing nested path parameter causes no results -> Option D
Quick Check:
Nested queries need path parameter [OK]

Quick Trick: Always include nested path in nested queries [OK]

Common Mistakes:

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You have a nested field comments but your nested query returns no results. What is a likely cause?