From 5166073f98c13fe12255c6cf0fd0af9abb262828 Mon Sep 17 00:00:00 2001
From: Ryan McKinley <ryantxu@gmail.com>
Date: Tue, 3 Mar 2020 22:27:58 -0800
Subject: [PATCH] DataSourceWithBackend: apply template variables (#22558)

---
 .../grafana-runtime/src/utils/DataSourceWithBackend.ts   | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/packages/grafana-runtime/src/utils/DataSourceWithBackend.ts b/packages/grafana-runtime/src/utils/DataSourceWithBackend.ts
index 9761f75ac50..4499892b266 100644
--- a/packages/grafana-runtime/src/utils/DataSourceWithBackend.ts
+++ b/packages/grafana-runtime/src/utils/DataSourceWithBackend.ts
@@ -44,7 +44,7 @@ export class DataSourceWithBackend<
         throw new Error('Unknown Datasource: ' + q.datasource);
       }
       return {
-        ...q,
+        ...this.applyTemplateVariables(q),
         datasourceId: ds.id,
         intervalMs,
         maxDataPoints,
@@ -70,6 +70,13 @@ export class DataSourceWithBackend<
     return from(req);
   }
 
+  /**
+   * Override to apply template variables
+   */
+  applyTemplateVariables(query: DataQuery) {
+    return query;
+  }
+
   /**
    * This makes the arrow library loading async.
    */