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Martijn van Groningen 2017-08-09 08:58:36 +02:00
parent a3a6ce6220
commit 6c46a67dd6
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core/src/main/java/org/elasticsearch/search/fetch/FetchPhase.java
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@ -276,6 +276,11 @@ public class FetchPhase implements SearchPhase {
}
if ((nestedParsedSource.get(0) instanceof Map) == false &&
nestedObjectMapper.parentObjectMapperAreNested(context.mapperService()) == false) {
// When one of the parent objects are not nested then XContentMapValues.extractValue(...) extracts the values
// from two or more layers resulting in a list of list being returned. This is because nestedPath
// encapsulates two or more object layers in the _source.
//
// This is why only the first element of nestedParsedSource needs to be checked.
throw new IllegalArgumentException("Cannot execute inner hits. One or more parent object fields of nested field [" +
nestedObjectMapper.name() + "] are not nested. All parent fields need to be nested fields too");
}