なんかもうめっちゃ変えた

packages/backend/src/misc/reset-db.ts

@@ -0,0 +1,28 @@
+import type { DataSource } from 'typeorm';
+
+export async function resetDb(db: DataSource) {
+	const reset = async () => {
+		const tables = await db.query(`SELECT relname AS "table"
+		FROM pg_class C LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
+		WHERE nspname NOT IN ('pg_catalog', 'information_schema')
+			AND C.relkind = 'r'
+			AND nspname !~ '^pg_toast';`);
+		for (const table of tables) {
+			await db.query(`DELETE FROM "${table.table}" CASCADE`);
+		}
+	};
+
+	for (let i = 1; i <= 3; i++) {
+		try {
+			await reset();
+		} catch (e) {
+			if (i === 3) {
+				throw e;
+			} else {
+				await new Promise(resolve => setTimeout(resolve, 1000));
+				continue;
+			}
+		}
+		break;
+	}
+}