init() — drizzle-orm Function Reference

Architecture documentation for the init() function in v2.ts from the drizzle-orm codebase.

Function typescript DrizzleSeed SeedOrchestration

Entity Profile

DrizzleSeed→ SeedOrchestration→ init() — drizzle-orm Function Reference

Dependency Diagram

graph TD
  6480bf88_2c10_34de_6860_12e2e42ecfe1["init()"]
  fc6e7285_d1f5_de22_dff8_2454260f8540["GenerateUniqueIntervalV2"]
  6480bf88_2c10_34de_6860_12e2e42ecfe1 -->|defined in| fc6e7285_d1f5_de22_dff8_2454260f8540
  style 6480bf88_2c10_34de_6860_12e2e42ecfe1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-seed/src/services/versioning/v2.ts lines 58–84

	override init({ count, seed }: { count: number; seed: number }) {
		const allFields = ['year', 'month', 'day', 'hour', 'minute', 'second'];
		let fieldsToGenerate: string[] = allFields;

		if (this.params.fields !== undefined && this.params.fields?.includes(' to ')) {
			const tokens = this.params.fields.split(' to ');
			const endIdx = allFields.indexOf(tokens[1]!);
			fieldsToGenerate = allFields.slice(0, endIdx + 1);
		} else if (this.params.fields !== undefined) {
			const endIdx = allFields.indexOf(this.params.fields);
			fieldsToGenerate = allFields.slice(0, endIdx + 1);
		}

		let maxUniqueIntervalsNumber = 1;
		for (const field of fieldsToGenerate) {
			const from = this.config[field]!.from, to = this.config[field]!.to;
			maxUniqueIntervalsNumber *= from - to + 1;
		}

		if (count > maxUniqueIntervalsNumber) {
			throw new RangeError(`count exceeds max number of unique intervals(${maxUniqueIntervalsNumber})`);
		}

		const rng = prand.xoroshiro128plus(seed);
		const intervalSet = new Set<string>();
		this.state = { rng, fieldsToGenerate, intervalSet };
	}