init() — drizzle-orm Function Reference

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

Function typescript DrizzleSeed SeedOrchestration

Entity Profile

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

Dependency Diagram

graph TD
  9da05167_80c6_e057_92b7_994ab2f4899b["init()"]
  1054b61b_b48b_edf5_f7d5_53582dab5417["GenerateUniqueStreetAddress"]
  9da05167_80c6_e057_92b7_994ab2f4899b -->|defined in| 1054b61b_b48b_edf5_f7d5_53582dab5417
  style 9da05167_80c6_e057_92b7_994ab2f4899b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

drizzle-seed/src/services/Generators.ts lines 2258–2306

	override init({ count, seed }: { count: number; seed: number }) {
		const streetNumberStrs = Array.from({ length: 999 }, (_, i) => String(i + 1));
		const maxUniqueStreetnamesNumber = streetNumberStrs.length * firstNames.length * streetSuffix.length
			+ streetNumberStrs.length * firstNames.length * streetSuffix.length;

		if (count > maxUniqueStreetnamesNumber) {
			throw new RangeError(
				`count exceeds max number of unique street names(${maxUniqueStreetnamesNumber}).`,
			);
		}

		const maxStreetAddressLength = 4 + Math.max(maxFirstNameLength, maxLastNameLength) + 1 + maxStreetSuffixLength;
		if (this.stringLength !== undefined && this.stringLength < maxStreetAddressLength) {
			throw new Error(
				`You can't use street address generator with a db column length restriction of ${this.stringLength}. Set the maximum string length to at least ${maxStreetAddressLength}.`,
			);
		}

		const rng = prand.xoroshiro128plus(seed);
		// ["1", "2", ..., "999"]

		const possStreetNameObjs = [
			{
				indicesGen: new GenerateUniqueInt({
					minValue: 0,
					maxValue: streetNumberStrs.length * firstNames.length * streetSuffix.length - 1,
				}),
				maxUniqueStreetNamesNumber: streetNumberStrs.length * firstNames.length * streetSuffix.length,
				count: 0,
				arraysToChooseFrom: [streetNumberStrs, firstNames, streetSuffix],
			},
			{
				indicesGen: new GenerateUniqueInt({
					minValue: 0,
					maxValue: streetNumberStrs.length * lastNames.length * streetSuffix.length - 1,
				}),
				maxUniqueStreetNamesNumber: streetNumberStrs.length * firstNames.length * streetSuffix.length,
				count: 0,
				arraysToChooseFrom: [streetNumberStrs, lastNames, streetSuffix],
			},
		];

		for (const possStreetNameObj of possStreetNameObjs) {
			possStreetNameObj.indicesGen.skipCheck = true;
			possStreetNameObj.indicesGen.init({ count, seed });
		}

		this.state = { rng, possStreetNameObjs };
	}