Kong/insomnia · error · InsoError

Expected single in the data store, but found none.

Error message

Expected single ${entity} in the data store, but found none.

What it means

Validation helper failure from ensureSingle: a data-store query expected exactly one entity of the given type (identified by the interpolated entity name) but the query returned zero matches. Typically means a required singleton document (e.g. settings or a base model) is missing from the NeDB store.

Solutions

1. Re-create the missing singleton via getOrCreateForParentId or equivalent
2. Restore from a sync/git snapshot
3. Verify the parent id used in the lookup is correct

When it happens

Trigger: Thrown at packages/insomnia-inso/src/db/models/util.ts:48 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Kong/insomnia@d9bb2b0142 (2026-08-26). Data as JSON: /api/errors/a783d746b4bfff52. Report an issue: GitHub.

Appendix: source

Thrown at packages/insomnia-inso/src/db/models/util.ts:48

export const ensureSingleOrNone = <T>(items: T[], entity: string): T | null | undefined => {
  if (items.length === 1) {
    return items[0];
  }

  if (items.length === 0) {
    return null;
  }

  throw new InsoError(`Expected single or no ${entity} in the data store, but found multiple (${items.length}).`);
};
export const ensureSingle = <T>(items: T[], entity: string): T => {
  if (items.length === 1) {
    return items[0];
  }

  if (items.length === 0) {
    throw new InsoError(`Expected single ${entity} in the data store, but found none.`);
  }

  throw new InsoError(`Expected single ${entity} in the data store, but found multiple (${items.length}).`);
};

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