fix(elasticsearch): for query template variable when looking up terms without…

fix(elasticsearch): for query template variable when looking up terms without query, no longer relies on elasticsearch default field, fixes #3887

CHANGELOG.md

@@ -24,6 +24,7 @@
 * **Playlist**: Fixed problem with play order not matching order defined in playlist, fixes [#5467](https://github.com/grafana/grafana/pull/5467)
 * **Graph panel**: Fixed problem with auto decimals on y axis when datamin=datamax, fixes [#6070](https://github.com/grafana/grafana/pull/6070)
 * **Snapshot**: Can view embedded panels/png rendered panels in snapshots without login, fixes [#3769](https://github.com/grafana/grafana/pull/3769)
+* **Elasticsearch**: Fix for query template variable when looking up terms without query, no longer relies on elasticsearch default field, fixes [#3887](https://github.com/grafana/grafana/pull/3887)
 
 # 3.1.2 (unreleased)
 * **Templating**: Fixed issue when combining row & panel repeats, fixes [#5790](https://github.com/grafana/grafana/issues/5790)

public/app/plugins/datasource/elasticsearch/datasource.js

@@ -216,11 +216,6 @@ function (angular, _, moment, kbn, ElasticQueryBuilder, IndexPattern, ElasticRes
       });
     };
 
-    function escapeForJson(value) {
-      var luceneQuery = JSON.stringify(value);
-      return luceneQuery.substr(1, luceneQuery.length - 2);
-    }
-
     this.getFields = function(query) {
       return this._get('/_mapping').then(function(result) {
         var typeMap = {
@@ -285,7 +280,6 @@ function (angular, _, moment, kbn, ElasticQueryBuilder, IndexPattern, ElasticRes
       var header = this.getQueryHeader('count', range.from, range.to);
       var esQuery = angular.toJson(this.queryBuilder.getTermsQuery(queryDef));
 
-      esQuery = esQuery.replace("$lucene_query", escapeForJson(queryDef.query));
       esQuery = esQuery.replace(/\$timeFrom/g, range.from.valueOf());
       esQuery = esQuery.replace(/\$timeTo/g, range.to.valueOf());
       esQuery = header + '\n' + esQuery + '\n';

public/app/plugins/datasource/elasticsearch/query_builder.js

@@ -221,12 +221,6 @@ function (queryDef) {
       "size": 0,
       "query": {
         "filtered": {
-          "query": {
-            "query_string": {
-              "analyze_wildcard": true,
-              "query": '$lucene_query',
-            }
-          },
           "filter": {
             "bool": {
               "must": [{"range": this.getRangeFilter()}]
@@ -235,6 +229,16 @@ function (queryDef) {
         }
       }
     };
+
+    if (queryDef.query) {
+      query.query.filtered.query = {
+        "query_string": {
+          "analyze_wildcard": true,
+          "query": queryDef.query,
+        }
+      };
+    }
+
     query.aggs =  {
       "1": {
         "terms": {