How to remove the _class field when automatically creating index and how to specify what fields we want return in query?

[fengnex]

There are two questions:

1. A field named _class will be inserted automatically when spring-data-elasticsearch creates an index, even though it is not desired. I wonder how to avoid that.
2. *Repository always return ALL fields from elasticsearch after querying, and how to specify the fields we want to return? Not ALL.

[sothawo]

1. A field named _class will be inserted automatically when spring-data-elasticsearch creates an index, even though it is not desired. I wonder how to avoid that.

Implemented with #1788, this is contained since release 4.3.0-M1, check the documentation for details (last part of the linked chapter).

2. Repository always return ALL fields from elasticsearch after querying, and how to specify the fields we want to return? Not ALL.

Currently not possible with repository methods, only when you use an ElasticsearchOperations implementation when sednding a query. The Query has setFields() or addSourceFilter() for this purpose.

[fengnex]

@sothawo Thank you and I found that _class seems necessary and it is recommended not to disable it.
BTW, the following statement in the document specified in the above post actually cannot work because java compiler will complain "Cannot resolve method 'writeTypeHint'":
@document(indexName = "index", writeTypeHint = WriteTypeHint.FALSE)

[sothawo]

Do you use the current milestone version for 4.3 (4.3.0-M1)? If you get this compiler version you are using one of the released versions.

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