fix: Prevent dashboard error when metricName is defined for non-metric source (#1649)

Closes HDX-3236

# Summary

This PR fixes an error that occurs when a metricName/metricType is set for a dashboard tile configuration, despite the queried source not being a metric source.

1. Updates in DBEditTimeChartForm prevent us from saving configurations with metricName/metricType for non metric sources
2. Updates in DBDashboardPage ensure that metricName/metricType is ignored for any saved configurations for non-metric sources.

## Demo

A new tile would be saved with a metricName/Type incorrectly when

1. Create the tile
2. Select a metric source
3. Select a metric name
4. Switch back to a non-metric source
5. Save

And the Dashboard tile would then error:

<img width="1288" height="1012" alt="Screenshot 2026-01-23 at 2 39 38 PM" src="https://github.com/user-attachments/assets/4fa4b0bf-355e-47bb-a504-cd03e0dca2d0" />

Now, the configuration is not saved with metricName/Type, and the dashboard does not error for a saved configuration that has a metricName/Type:

<img width="769" height="423" alt="Screenshot 2026-01-23 at 2 43 04 PM" src="https://github.com/user-attachments/assets/92af36aa-dd46-47b8-ae59-d0e4bfcb28af" />

.changeset/short-camels-hug.md

@@ -0,0 +1,5 @@
+---
+"@hyperdx/app": patch
+---
+
+fix: Prevent dashboard error when metricName is defined for non-metric source

packages/app/src/DBDashboardPage.tsx

@@ -20,6 +20,7 @@ import { convertToDashboardTemplate } from '@hyperdx/common-utils/dist/core/util
 import {
   AlertState,
   DashboardFilter,
+  SourceKind,
   TSourceUnion,
 } from '@hyperdx/common-utils/dist/types';
 import {
@@ -182,10 +183,14 @@ const Tile = forwardRef(
 
     useEffect(() => {
       if (source != null) {
+        const isMetricSource = source.kind === SourceKind.Metric;
+
         // TODO: will need to update this when we allow for multiple metrics per chart
         const firstSelect = chart.config.select[0];
         const metricType =
-          typeof firstSelect !== 'string' ? firstSelect?.metricType : undefined;
+          isMetricSource && typeof firstSelect !== 'string'
+            ? firstSelect?.metricType
+            : undefined;
         const tableName = getMetricTableName(source, metricType);
         if (source.connection) {
           setQueriedConfig({
@@ -200,7 +205,7 @@ const Tile = forwardRef(
             },
             implicitColumnExpression: source.implicitColumnExpression,
             filters,
-            metricTables: source.metricTables,
+            metricTables: isMetricSource ? source.metricTables : undefined,
           });
         }
       }

packages/app/src/components/DBEditTimeChartForm.tsx

@@ -135,6 +135,29 @@ const getSeriesFieldPath = (
   return `${namePrefix}${fieldName}` as FieldPath<SavedChartConfigWithSeries>;
 };
 
+export function normalizeChartConfig<
+  C extends Pick<
+    SavedChartConfig,
+    'select' | 'having' | 'orderBy' | 'displayType' | 'metricTables'
+  >,
+>(config: C, source: TSource): C {
+  const isMetricSource = source.kind === SourceKind.Metric;
+  return {
+    ...config,
+    // Strip out metric-specific fields for non-metric sources
+    select:
+      !isMetricSource && Array.isArray(config.select)
+        ? config.select.map(s => omit(s, ['metricName', 'metricType']))
+        : config.select,
+    metricTables: isMetricSource ? config.metricTables : undefined,
+    // Order By and Having can only be set by the user for table charts
+    having:
+      config.displayType === DisplayType.Table ? config.having : undefined,
+    orderBy:
+      config.displayType === DisplayType.Table ? config.orderBy : undefined,
+  };
+}
+
 // Helper function to validate metric names for metric sources
 const validateMetricNames = (
   tableSource: TSource | undefined,
@@ -684,19 +707,13 @@ export default function EditTimeChartForm({
           select: isSelectEmpty
             ? tableSource.defaultTableSelectExpression || ''
             : config.select,
-          // Order By and Having can only be set by the user for table charts
-          having: config.displayType === DisplayType.Table ? config.having : '',
-          orderBy:
-            config.displayType === DisplayType.Table
-              ? config.orderBy
-              : undefined,
         };
         setQueriedConfigAndSource(
           // WARNING: DON'T JUST ASSIGN OBJECTS OR DO SPREAD OPERATOR STUFF WHEN
           // YOUR STATE IS AN OBJECT. YOU'RE COPYING BY REFERENCE WHICH MIGHT
           // ACCIDENTALLY CAUSE A useQuery SOMEWHERE TO FIRE A REQUEST EVERY TIME
           // AN INPUT CHANGES. USE structuredClone TO PERFORM A DEEP COPY INSTEAD
-          structuredClone(newConfig),
+          structuredClone(normalizeChartConfig(newConfig, tableSource)),
           tableSource,
         );
       }
@@ -734,25 +751,30 @@ export default function EditTimeChartForm({
 
   const handleSave = useCallback(
     (v: SavedChartConfigWithSeries) => {
-      // Validate metric sources have metric names selected
-      if (validateMetricNames(tableSource, v.series, setError)) {
-        return;
-      }
+      if (tableSource != null) {
+        // Validate metric sources have metric names selected
+        if (validateMetricNames(tableSource, v.series, setError)) {
+          return;
+        }
 
-      // If the chart type is search, we need to ensure the select is a string
-      if (displayType === DisplayType.Search && typeof v.select !== 'string') {
-        v.select = '';
-      } else if (displayType !== DisplayType.Search) {
-        v.select = v.series;
-      }
+        // If the chart type is search, we need to ensure the select is a string
+        if (
+          displayType === DisplayType.Search &&
+          typeof v.select !== 'string'
+        ) {
+          v.select = '';
+        } else if (displayType !== DisplayType.Search) {
+          v.select = v.series;
+        }
 
-      // If the chart is not a table chart, we should clear the having clause
-      if (displayType !== DisplayType.Table) {
-        v.having = undefined;
-      }
+        const normalizedChartConfig = normalizeChartConfig(
+          // Avoid saving the series field. Series should be persisted in the select field.
+          omit(v, ['series']),
+          tableSource,
+        );
 
-      // Avoid saving the series field. Series should be persisted in the select field.
-      onSave?.(omit(v, ['series']));
+        onSave?.(normalizedChartConfig);
+      }
     },
     [onSave, displayType, tableSource, setError],
   );