Elasticsearch filters

Elastic Stack Elasticsearch
1

I will receive the filter inputs from the front-end some may be null or empty but in the elasticsearch query filter all the field should be present . How to get response even the inputs are empty for some filters ?

{
    "query": {
        "bool": {
            "must": {
                "match": {
                    "Abstract": "cancer"
                }
            },
            "filter": [
                {
                    "term": {
                        "Publication Type": "Review"
                    }
                },
                {
                    "range": {
                        "Date Completed": {
                            "gte": "1800",
                            "lte": "2017",
                            "format": "yyyy"
                        }
                    }
                }
            ]
        }
    }
}
2

Then you need to have some defaults that are passed in by the code.
Either that or use a search template - Search Template | Elasticsearch Guide [6.5] | Elastic

3

sorry Im new to elasticsearch could you elaborate

4

Hello,
As per my knowledge,
when inputs are coming from frontend ,
i.you need to keep validations for those fields and inform the user that inputs must not be null.
or
ii.replace null or empty with default value.