IF condition in Elasticsearch DSL

Question

I am new to Elasticsearch and I have an ELS index "student" with the following query. I need to execute the student.name only when the is_rep=True.

Note: is_rep field will not be available explicitly

"query": {
  "bool": {
    "must": { "term": { "subject": "maths" }} ,
    "must": { "term": { "student.name": "xyz"}}
   }
}

Can anyone please guide me to achieve this

Answer 1

I would do something like this:

{
  "query": {
    "bool": {
      "filter": [
        {
          "term": {
            "subject": "maths"
          }
        },
        {
          "bool": {
            "minimum_should_match": 1,
            "should": [
              {
                "term": {
                  "is_rep": false
                }
              },
              {
                "bool": {
                  "filter": [
                    {
                      "term": {
                        "student.name": "xyz"
                      }
                    },
                    {
                      "term": {
                        "is_rep": true
                      }
                    }
                  ]
                }
              }
            ]
          }
        }
      ]
    }
  }
}