Explore: Fixes error when switching from prometheus to loki data sources (#18599)

Closes #18594 Closes #18596

Explore: Fixes error when switching from prometheus to loki data sources (#18599)
Closes #18594 Closes #18596
bf82e6cd · kay delaney · GitHub · f3d1543e · bf82e6cd
Commit bf82e6cd authored Aug 16, 2019 by kay delaney Committed by GitHub Aug 16, 2019
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public/app/features/explore/QueryField.tsx
+1 -1

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--- a/public/app/features/explore/QueryField.tsx
+++ b/public/app/features/explore/QueryField.tsx
@@ -115,7 +115,7 @@ export class QueryField extends React.PureComponent<QueryFieldProps, QueryFieldS
    if (initialQuery !== prevProps.initialQuery) {
      // and we have a version that differs
      if (initialQuery !== Plain.serialize(value)) {
-        this.setState({ value: makeValue(initialQuery, syntax) });
+        this.setState({ value: makeValue(initialQuery || '', syntax) });
      }
    }