fix: fixed test data fake metric query, fixes #8474

pkg/api/api.go

@@ -253,6 +253,7 @@ func (hs *HttpServer) registerRoutes() {
 		r.Post("/tsdb/query", bind(dtos.MetricRequest{}), wrap(QueryMetrics))
 		r.Get("/tsdb/testdata/scenarios", wrap(GetTestDataScenarios))
 		r.Get("/tsdb/testdata/gensql", reqGrafanaAdmin, wrap(GenerateSqlTestData))
+		r.Get("/tsdb/testdata/random-walk", wrap(GetTestDataRandomWalk))
 
 		// metrics
 		r.Get("/metrics", wrap(GetInternalMetrics))

pkg/api/metrics.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/metrics"
 	"github.com/grafana/grafana/pkg/middleware"
 	"github.com/grafana/grafana/pkg/models"
@@ -144,3 +145,29 @@ func GenerateSqlTestData(c *middleware.Context) Response {
 
 	return Json(200, &util.DynMap{"message": "OK"})
 }
+
+// GET /api/tsdb/testdata/random-walk
+func GetTestDataRandomWalk(c *middleware.Context) Response {
+	from := c.Query("from")
+	to := c.Query("to")
+	intervalMs := c.QueryInt64("intervalMs")
+
+	timeRange := tsdb.NewTimeRange(from, to)
+	request := &tsdb.Request{TimeRange: timeRange}
+
+	request.Queries = append(request.Queries, &tsdb.Query{
+		RefId:      "A",
+		IntervalMs: intervalMs,
+		Model: simplejson.NewFromAny(&util.DynMap{
+			"scenario": "random_walk",
+		}),
+		DataSource: &models.DataSource{Type: "grafana-testdata-datasource"},
+	})
+
+	resp, err := tsdb.HandleRequest(context.Background(), request)
+	if err != nil {
+		return ApiError(500, "Metric request error", err)
+	}
+
+	return Json(200, &resp)
+}

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

@@ -8,11 +8,31 @@ class GrafanaDatasource {
   constructor(private backendSrv, private $q) {}
 
   query(options) {
-    return this.$q.when({data: []});
+    return this.backendSrv.get('/api/tsdb/testdata/random-walk', {
+      from: options.range.from.valueOf(),
+      to: options.range.to.valueOf(),
+      intervalMs: options.intervalMs,
+      maxDataPoints: options.maxDataPoints,
+    }).then(res => {
+      var data = [];
+
+      if (res.results) {
+        _.forEach(res.results, queryRes => {
+          for (let series of queryRes.series) {
+            data.push({
+              target: series.name,
+              datapoints: series.points
+            });
+          }
+        });
       }
 
-  metricFindQuery() {
-    return this.$q.when([]);
+      return {data: data};
+    });
+  }
+
+  metricFindQuery(options) {
+    return this.$q.when({data: []});
   }
 
   annotationQuery(options) {

public/app/plugins/datasource/grafana/partials/query.editor.html

 <query-editor-row query-ctrl="ctrl" can-collapse="false">
 	<div class="gf-form-inline">
 		<div class="gf-form">
-			<label class="gf-form-label">Test metric (fake data source)</label>
+			<label class="gf-form-label">Test data: random walk</label>
+		</div>
+
+		<div class="gf-form gf-form--grow">
+			<div class="gf-form-label gf-form-label--grow"></div>
 		</div>
 	</div>
 </query-editor-row>