testSchemasResolver() — drizzle-orm Function Reference

Source Code

drizzle-kit/tests/schemaDiffer.ts lines 114–170

	(renames: Set<string>) => async (input: ResolverInput<Named>): Promise<ResolverOutput<Named>> => {
		try {
			if (
				input.created.length === 0
				|| input.deleted.length === 0
				|| renames.size === 0
			) {
				return {
					created: input.created,
					renamed: [],
					deleted: input.deleted,
				};
			}

			let createdSchemas = [...input.created];
			let deletedSchemas = [...input.deleted];

			const result: {
				created: Named[];
				renamed: { from: Named; to: Named }[];
				deleted: Named[];
			} = { created: [], renamed: [], deleted: [] };

			for (let rename of renames) {
				const [from, to] = rename.split('->');

				const idxFrom = deletedSchemas.findIndex((it) => {
					return it.name === from;
				});

				if (idxFrom >= 0) {
					const idxTo = createdSchemas.findIndex((it) => {
						return it.name === to;
					});

					result.renamed.push({
						from: deletedSchemas[idxFrom],
						to: createdSchemas[idxTo],
					});

					delete createdSchemas[idxTo];
					delete deletedSchemas[idxFrom];

					createdSchemas = createdSchemas.filter(Boolean);
					deletedSchemas = deletedSchemas.filter(Boolean);
				}
			}

			result.created = createdSchemas;
			result.deleted = deletedSchemas;

			return result;
		} catch (e) {
			console.error(e);
			throw e;
		}
	};