NoSQL local file storage with constraints -- unique keys, null check and indexing, akin to SQLite, with API similar to liteorm. Powered by TypeScript decorators and interface. Also with async event-emitter, thanks to emittery.

Can save as BSON with BsonAdapter.

Filtering and mapping with objects (in find, update, delete) is possible, thanks to lodash.

If you need typings, you can also enforce constraints.

Usage

import { Db } from "nocon-db";

(async () => {
  const db = new Db("foo.nocon");
  await db.load();
  const col = db.collection<any>("bar");
  await col.insert({a: 1, b: new Date()});
  console.log(await col.find({a: 1}));
})();

You can even define Schema and unique keys. In this case, you will need to use Class decorators.

import { Db, prop, Table, BsonAdapter } from "nocon-db";

@Table()
class UniqueA {
  @prop({unique: true}) a!: string;
  b!: Date;
}

(async () => {
  let db = new Db("test.nocon", new BsonAdapter());
  await db.load();
  const col = db.collection(new UniqueA());
  await col.insert({a: "any", b: new Date()});
  console.log(await col.find());
  await db.close();

  db = new Db("test.nocon", new BsonAdapter());
  await db.load();
  const col = db.collection(new UniqueA());
  await col.insert({a: "any", b: new Date()});  // Error
})();