drizzle-team/drizzle-orm · error · Error

One of weighted values length equals zero.

Error message

One of weighted values length equals zero.

What it means

Error "One of weighted values length equals zero." thrown in drizzle-team/drizzle-orm.

Source

Thrown at drizzle-seed/src/services/Generators.ts:223

		genIndicesObj: GenerateUniqueInt | undefined;
		genIndicesObjList: GenerateUniqueInt[] | undefined;
		valuesWeightedIndices: number[] | undefined;
		genMaxRepeatedValuesCount: GenerateDefault | GenerateWeightedCount | undefined;
	} | undefined;
	public override timeSpent: number = 0;

	checks({ count }: { count: number }) {
		const { values } = this.params;
		const { maxRepeatedValuesCount, notNull, isUnique } = this;
		if (values.length === 0) {
			throw new Error('Values length equals zero.');
		}

		if (
			isObject(values[0])
			&& !(values as { weight: number; values: any[] }[]).every((val) => val.values.length !== 0)
		) {
			throw new Error('One of weighted values length equals zero.');
		}

		if (
			maxRepeatedValuesCount !== undefined && (
				(typeof maxRepeatedValuesCount === 'number' && maxRepeatedValuesCount <= 0)
				|| (typeof maxRepeatedValuesCount === 'object' && !maxRepeatedValuesCount
					.every((obj) =>
						(typeof obj.count) === 'number'
							? (obj.count as number) > 0
							: (obj.count as number[]).every((count) => count > 0)
					))
			)
		) {
			throw new Error('maxRepeatedValuesCount should be greater than zero.');
		}

		let allValuesCount = values.length;
		if (isObject(values[0])) {

View on GitHub (pinned to b7862528fd)

Solutions

1. Ensure every weighted entry has a non-empty values array; add at least one value per weight entry.

When it happens

Trigger: One entry of a weighted-values generator has an empty values array while others are non-empty.

Common situations: Mixed literal and generated weighted entries where one entry's values were filtered out.

AI-assisted analysis of drizzle-team/drizzle-orm@b7862528fd (2026-08-03). Data as JSON: /data/errors/874c7224f6b6320d.json. Report an issue: GitHub.