[Solved] You wrote this mapping:{"properties": {"flag": {"type": "boolean"}}}But your query {"term": {"flag": "true"}} returns no results. Why? | Elasticsearch

Elasticsearch - Mappings and Data Types

You wrote this mapping:

{"properties": {"flag": {"type": "boolean"}}}

But your query {"term": {"flag": "true"}} returns no results. Why?

ABoolean fields require true/false without quotes

BThe field name is incorrect

CTerm query does not work on boolean fields

DThe mapping is invalid

Step-by-Step Solution

Solution:

Step 1: Check query value type
Boolean fields expect true or false as boolean literals, not strings.
Step 2: Identify cause of no results
Using "true" as a string does not match the boolean true value, so no documents match.
Final Answer:
Boolean fields require true/false without quotes -> Option A
Quick Check:
Boolean query values must be boolean literals [OK]

Quick Trick: Use true/false literals, not strings, for boolean queries [OK]

Common Mistakes:

MISTAKES

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