grafana/public/app/plugins/datasource/elasticsearch/config_ctrl.ts

import _ from "lodash";

export class ElasticConfigCtrl {
  static templateUrl = "public/app/plugins/datasource/elasticsearch/partials/config.html";
  current: any;

  /** @ngInject */
  constructor($scope) {
    this.current.jsonData.timeField =
      this.current.jsonData.timeField || "@timestamp";
    this.current.jsonData.esVersion = this.current.jsonData.esVersion || 5;
    this.current.jsonData.maxConcurrentShardRequests =
      this.current.jsonData.maxConcurrentShardRequests || 256;
  }

  indexPatternTypes = [
    { name: "No pattern", value: undefined },
    { name: "Hourly", value: "Hourly", example: "[logstash-]YYYY.MM.DD.HH" },
    { name: "Daily", value: "Daily", example: "[logstash-]YYYY.MM.DD" },
    { name: "Weekly", value: "Weekly", example: "[logstash-]GGGG.WW" },
    { name: "Monthly", value: "Monthly", example: "[logstash-]YYYY.MM" },
    { name: "Yearly", value: "Yearly", example: "[logstash-]YYYY" }
  ];

  esVersions = [
    { name: "2.x", value: 2 },
    { name: "5.x", value: 5 },
    { name: "5.6+", value: 56 }
  ];

  indexPatternTypeChanged() {
    var def = _.find(this.indexPatternTypes, {
      value: this.current.jsonData.interval
    });
    this.current.database = def.example || "es-index-name";
  }
}