feat(elasticsearch): added min_doc_count option for date histogram, closes #3416

CHANGELOG.md

@@ -6,6 +6,7 @@
 ### Enhancements
 * **CloudWatch**: Support for multiple AWS Credentials, closes [#3053](https://github.com/grafana/grafana/issues/3053), [#3080](https://github.com/grafana/grafana/issues/3080)
 * **Elasticsearch**: Support for dynamic daily indices for annotations, closes [#3061](https://github.com/grafana/grafana/issues/3061)
+* **Elasticsearch**: Support for setting min_doc_count for date histogram, closes [#3416](https://github.com/grafana/grafana/issues/3416)
 * **Graph Panel**: Option to hide series with all zeroes from legend and tooltip, closes [#1381](https://github.com/grafana/grafana/issues/1381), [#3336](https://github.com/grafana/grafana/issues/3336)
 
 ### Bug Fixes

public/app/panels/table/specs/table_model_specs.ts

@@ -0,0 +1 @@
+

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

@@ -92,8 +92,10 @@ function (angular, _, queryDef) {
         }
         case 'date_histogram': {
           settings.interval = settings.interval || 'auto';
+          settings.min_doc_count = settings.min_doc_count || 0;
           $scope.agg.field = $scope.target.timeField;
           settingsLinkText = 'Interval: ' + settings.interval;
+          settingsLinkText += ', Min Doc Count: ' + settings.min_doc_count;
         }
       }
 

public/app/plugins/datasource/elasticsearch/partials/bucketAgg.html

@@ -35,9 +35,9 @@
 
 <div class="tight-form" ng-if="showOptions">
 	<div class="tight-form-inner-box" ng-if="agg.type === 'date_histogram'">
-		<div class="tight-form last">
+		<div class="tight-form">
 			<ul class="tight-form-list">
-				<li class="tight-form-item" style="width: 60px">
+				<li class="tight-form-item" style="width: 94px">
 					Interval
 				</li>
 				<li>
@@ -46,6 +46,17 @@
 			</ul>
 			<div class="clearfix"></div>
 		</div>
+		<div class="tight-form last">
+			<ul class="tight-form-list">
+				<li class="tight-form-item" style="width: 94px">
+					Min Doc Count
+				</li>
+				<li>
+					<input type="number" class="tight-form-input" ng-model="agg.settings.min_doc_count" ng-blur="onChangeInternal()"></metric-segment-model>
+				</li>
+			</ul>
+			<div class="clearfix"></div>
+		</div>
 	</div>
 	<div class="tight-form-inner-box" ng-if="agg.type === 'terms'">
 		<div class="tight-form">

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

@@ -50,12 +50,23 @@ function () {
     return queryNode;
   };
 
-  ElasticQueryBuilder.prototype.getInterval = function(agg) {
-    if (agg.settings && agg.settings.interval !== 'auto') {
-      return agg.settings.interval;
-    } else {
-      return '$interval';
+  ElasticQueryBuilder.prototype.getDateHistogramAgg = function(aggDef) {
+    var esAgg = {};
+    var settings = aggDef.settings || {};
+    esAgg.interval = settings.interval;
+    esAgg.field = this.timeField;
+    esAgg.min_doc_count = settings.min_doc_count || 0;
+    esAgg.extended_bounds = {min: "$timeFrom", max: "$timeTo"};
+
+    if (esAgg.interval === 'auto') {
+      esAgg.interval = "$interval";
     }
+
+    if (this.esVersion >= 2) {
+      esAgg.format = "epoch_millis";
+    }
+
+    return esAgg;
   };
 
   ElasticQueryBuilder.prototype.getFiltersAgg = function(aggDef) {
@@ -130,15 +141,7 @@ function () {
 
       switch(aggDef.type) {
         case 'date_histogram': {
-          esAgg["date_histogram"] = {
-            "interval": this.getInterval(aggDef),
-            "field": this.timeField,
-            "min_doc_count": 0,
-            "extended_bounds": { "min": "$timeFrom", "max": "$timeTo" }
-          };
-          if (this.esVersion >= 2) {
-            esAgg["date_histogram"]["format"] = "epoch_millis";
-          }
+          esAgg["date_histogram"] = this.getDateHistogramAgg(aggDef);
           break;
         }
         case 'filters': {

public/app/plugins/datasource/influxdb/specs/influx_series_specs.ts

@@ -205,7 +205,7 @@ describe('when generating timeseries from influxdb response', function() {
 
       expect(table.type).to.be('table');
       expect(table.columns.length).to.be(3);
-      expect(table.rows[0]).to.eql([1431946625000, 'America', 10]);;
+      expect(table.rows[0]).to.eql([1431946625000, 'America', 10]);
     });
   });