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Prometheus: Fix empty query string (expr) breaking dashboard panel (#69938)

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* empty string if query.expr is undefined or null
This commit is contained in:
Galen Kistler 2023-06-12 14:42:59 -05:00 committed by GitHub
parent 45b3012db4
commit fb290235fd
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3 changed files with 18 additions and 2 deletions
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2
public/app/plugins/datasource/prometheus/querybuilder/QueryPatternsModal.tsx
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@ -32,7 +32,7 @@ export const QueryPatternsModal = (props: Props) => {
const styles = useStyles2(getStyles);
const hasNewQueryOption = !!onAddQuery;
const hasPreviousQuery = useMemo(() => {
const visualQuery = buildVisualQueryFromString(query.expr);
const visualQuery = buildVisualQueryFromString(query.expr ?? '');
// has anything entered in the query, metric, labels, operations, or binary queries
const hasOperations = visualQuery.query.operations.length > 0,
hasMetric = visualQuery.query.metric,

2
public/app/plugins/datasource/prometheus/querybuilder/components/PromQueryBuilderContainer.tsx
View File

@ -93,7 +93,7 @@ const stateSlice = createSlice({
exprChanged: (state, action: PayloadAction<string>) => {
if (!state.visQuery || state.expr !== action.payload) {
state.expr = action.payload;
const parseResult = buildVisualQueryFromString(action.payload);
const parseResult = buildVisualQueryFromString(action.payload ?? '');
state.visQuery = parseResult.query;
}

16
public/app/plugins/datasource/prometheus/querybuilder/parsing.test.ts
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@ -293,6 +293,22 @@ describe('buildVisualQueryFromString', () => {
);
});
it('Throws error when undefined', () => {
expect(() => buildVisualQueryFromString(undefined as unknown as string)).toThrow(
"Cannot read properties of undefined (reading 'replace')"
);
});
it('Works with empty string', () => {
expect(buildVisualQueryFromString('')).toEqual(
noErrors({
metric: '',
labels: [],
operations: [],
})
);
});
it('fails to parse variable for function', () => {
expect(buildVisualQueryFromString('${func_var}(metric{bar="foo"})')).toEqual({
errors: [