Best practice creating ES API using NodeJS

Elastic Stack Elasticsearch
1

Hi,
I developed simple nodejs project using ES as our search engine and
ElasticSearchClient for node

Node is exposing api to the user(using expressJS for that)

I have few search categories (search by username, search by firstname,
search by lastname, etc...)

This is the function (using promises) which returning search by username:

  • please ignore the inline params. this is just a POC

function performSearch(termToSearch) {

var deferred = Q.defer();
console.log("Request handler 'search' was called.");
var qryObj =
{
    "query": {
        "match": {
            "username": termToSearch
        }
    }
};
elasticSearchClient.search('my_index", "users", qryObj).
    on('data', function (data) {
        console.log(data)
        deferred.resolve(JSON.parse(data));
    })
    .on('error', function (err) {
        console.log(err);
        return deferred.resolve(err);
    })
    .exec();
return  deferred.promise;

}

My question is what if I want to implement the next fields.. I need to
duplicate this code with different queries? any best practical example to
upgrade that code.

thanks.

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2

Store your query into a variable (json) and pass to the same function