I used "fields" to limit only return selected fields:
{
"fields" : ["Title", "Price"],
"query" :{
...
}
}
The Price fields might be null for some of the documents, I found that only
when "Price" field value is NOT null, it is returned in ES response,
otherwise, it is missing in response. But if I remove "fields" from the
query, the null value field will appear in response.
Is it by design of Elasticsearch? How to return the null value fields in
response even using "fields" in query?
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