n8n-io/n8n · warning · OperationalError

Missing 'valueNumber' for 'greaterThan' operator.

Error message

Missing 'valueNumber' for 'greaterThan' operator.

What it means

buildFilter maps the node's filter configuration onto the Weaviate client API. For operator 'greaterThan' the required valueNumber field was not supplied (undefined), so the greaterThan clause cannot be constructed and an OperationalError names the missing field.

Solutions

Provide valueNumber: { operator: 'greaterThan', path: ['price'], valueNumber: 100 }.
Ensure the source expression yields a number (coerce with Number(...) or an explicit cast).
Remove the filter if no numeric bound applies.

Example fix

// before: { operator: 'greaterThan', path: ['price'] }
// after:  { operator: 'greaterThan', path: ['price'], valueNumber: 100 }

Defensive patterns

Strategy: validation

Validate before calling

if (f.operator.toLowerCase() === 'greaterthan' && typeof f.valueNumber !== 'number') { throw new Error("'greaterThan' requires a numeric valueNumber"); }

Type guard

function isGreaterThanComplete(f: WeaviateFilterUnit): f is WeaviateFilterUnit & { valueNumber: number } { return f.operator.toLowerCase() === 'greaterthan' && typeof f.valueNumber === 'number' && Number.isFinite(f.valueNumber); }

Try / catch

try { buildFilter(unit) } catch (e) { if (/valueNumber.*greaterThan/.test(e.message)) { /* coerce or reprompt */ } else throw e; }

Prevention

Coerce numeric inputs with Number(...) and reject NaN before building filters.
Pair every numeric operator with a number-typed input control in the UI.
Unit-test filter builders against missing/typed-wrong values.

When it happens

Trigger: Filter unit { operator: 'greaterthan', path: [...], /* valueNumber missing */ } reaches buildFilter.

Common situations: Numeric value left blank in the UI; expression mapped to a non-numeric or undefined value; JSON filter omitted valueNumber.

Related errors

AI-assisted analysis of n8n-io/n8n@5ac6606e81 (2026-08-12). Data as JSON: /api/errors/7dc4e35704f9f60f. Report an issue: GitHub.

Appendix: source

Thrown at packages/@n8n/nodes-langchain/nodes/vector_store/VectorStoreWeaviate/Weaviate.utils.ts:98

				throw new OperationalError("Missing 'valueString' for 'like' operator.");
			}
			return property.like(filter.valueString);

		case 'containsany':
			if (filter.valueTextArray === undefined) {
				throw new OperationalError("Missing 'valueTextArray' for 'containsAny' operator.");
			}
			return property.containsAny(filter.valueTextArray);

		case 'containsall':
			if (filter.valueTextArray === undefined) {
				throw new OperationalError("Missing 'valueTextArray' for 'containsAll' operator.");
			}
			return property.containsAll(filter.valueTextArray);

		case 'greaterthan':
			if (filter.valueNumber === undefined) {
				throw new OperationalError("Missing 'valueNumber' for 'greaterThan' operator.");
			}
			return property.greaterThan(filter.valueNumber);

		case 'lessthan':
			if (filter.valueNumber === undefined) {
				throw new OperationalError("Missing 'valueNumber' for 'lessThan' operator.");
			}
			return property.lessThan(filter.valueNumber);

		case 'isnull':
			if (filter.valueBoolean === undefined) {
				throw new OperationalError("Missing 'valueBoolean' for 'isNull' operator.");
			}
			return property.isNull(filter.valueBoolean);

		case 'withingeorange':
			if (!filter.valueGeoCoordinates) {
				throw new OperationalError("Missing 'valueGeoCoordinates' for 'withinGeoRange' operator.");

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