nedb-promises

A dead-simple promise wrapper for nedb.

Changed：No other dependencies, only nedb.

Use npm install git+https://github.com/ywzhaiqi/nedb-promises.git to install.

const Datastore = require('nedb-promises');
let db = new Datastore('/path/to/db.db');

// #1
db.find({ field: true })
  .then(...)
  .catch(...);

// #2
db.find({ field: true })
  .exec(...)
  .then(...)
  .catch(...);

// #1 and #2 are equivalent

db.findOne({ field: true })
  .then(...)
  .catch(...);

db.insert({ doc: 'yourdoc', createdAt: Date.now() })
  .then(...)
  .catch(...);

Usage

Everything works as the original module, except there are no callbacks, and "loadDatabase" has been renamed to "load".

Check out the original documentation!

load( )

You don't need to call this as the module will automatically detect if the datastore has been loaded or not upon calling any other method.

const Datastore = require('nedb-promises');
let db = new Datastore('/path/to/db.db');
db.load(...)
  .then(...)
  .catch(...)

find( query [, projection ] )

This will return a Cursor object that works the same way it did before except when you call "exec" it takes no arguments and returns a Promise.

update on Cursor objects

With the 1.1.0 update now you can simply call .then(...) on a Cursor to request the documents in a Promise.

Note that .exec() is still necessary when .find() is in the .then() of a Promise chain (otherwise the promise would be resolved with the Cursor object).

const Datastore = require('nedb-promises');
let db = new Datastore('/path/to/db.db');

//outside Promise chain
db.find(...)
  .then(...)
  .catch(...)

//insinde Promise chain
db.insert(...)
  .then(() => {
    return db.find(...).exec();
  })
  .then(
    // use the retrieved documents
  );

findOne( query [, projection ])

Unlike "find" this will not return a Cursor since it makes no sense to sort or limit a single document. This will simply return a Promise.

other( ... )

All the other methods will take the same arguments as they did before (except the callback) and will return a Promise.

update on the update( ... ) method

This method now (1.1.1) accepts upsert and returnUpdatedDocs as it would with the original module.

Special thanks to npeterkamps for the useful pull requests!