sendou.ink/app/db/sql.ts

import Database from "better-sqlite3";
import invariant from "tiny-invariant";
import { Kysely, ParseJSONResultsPlugin, SqliteDialect } from "kysely";
import type { DB } from "./tables";

const migratedEmptyDb = new Database("db-test.sqlite3").serialize();

invariant(process.env["DB_PATH"], "DB_PATH env variable must be set");
const isInMemoryDB = process.env["DB_PATH"] === ":memory:";

export const sql = new Database(
  isInMemoryDB ? migratedEmptyDb : process.env["DB_PATH"],
);

sql.pragma("journal_mode = WAL");
sql.pragma("foreign_keys = ON");
sql.pragma("busy_timeout = 5000");

export const db = new Kysely<DB>({
  dialect: new SqliteDialect({
    database: sql,
  }),
  // uncomment if you want examine the queries
  // log: process.env.NODE_ENV === "development" ? ["query"] : undefined,
  // log(event): void {
  //   if (event.level === "query") {
  //     console.log(event.query.sql);
  //     console.log(event.query.parameters);
  //   }
  // },
  plugins: [new ParseJSONResultsPlugin()],
});