constant_score query does not support query in the code

Question

"constant score query doesn't support query" error is coming when i am trying to run the following code.

client.search({
    index: ['index1','index2'],
    body: {
        from: 0, size: 20,
        query: {
            "constant_score": {
                boost: 1.0,
                "query": {
                    query_string: {
                        query: str,
                        fields: ['field_1']
                    }
                }
            }
        }
    },
});

Answer 1

constant_score query wraps another query. It either accepts another query or filter . Wrap query_string in filter instead of query.

Try using the below:

client.search({
    index: ['index1','index2'],
    body: {
        from: 0, size: 20,
        query: {
            "constant_score": {
                boost: 1.0,
                filter: {
                   query_string: {
                       query: str,
                       fields: ['field_1']
                   }
                }                
            }
        }
    },
});