Simple-dyno NPM

simple-dyno

Easy to use, minimalistic wrapper for AWS DynamoDB

Installation

$ npm install simple-dyno

Features

Easy way to create a model, keeping your code consistent and saving it to DynamoDB
Serializers to format your (json) response
Validation based on Joi
Encryption using bcrypt for your passwords
Local DynamoDB for testing purposes

Methods

To create a new entry, and options can include {skipValidation: true}:

Model.create(attributes, options)

To get an entry or multiple entries:

Model.get(keyValues)

To update an entry, and options can include {skipValidation: true}:

Model.update(keyValues, attributes, options)

To delete an entry:

Model.destroy(keyValues)

To perform a scan operation (not recommended):

Model.find(attributes)

To query using a secondary index:

Model.query(indexName, attributes)

To serialize the response attributes:

Model.serialize(response, options)

To run a local DynamoDB (which runs on Java), by default runs in memory but you can also store on disk using {inMemory: false} as options:

SimpleDyno.local(options)

To set the config, which you can pass the following options {accessKeyId: '', secretAccessKey: '', region: ''}:

SimpleDyno.config(options)

Example (in this case the config is set by default by AWS and assumes tables are already created)

// Import deps
import { Model } from 'simple-dyno';
import Joi from 'joi';

// Add your own methods
class UserModel extends Model {
  myAwesomeMethod(obj) {
    return obj.firstName+obj.lastName;
  }
}

// Create model instance
var User = new UserModel({
  table: 'users',
  hashKey: 'email',
  serializers: {
    default: ['email'],
    scary: ['access_token', 'password']
  },
  schema: {
    email: Joi.string().email(),
    access_token: Joi.string(),
    password: {
      format: Joi.string().regex(/[a-zA-Z0-9]{3,30}/),
      encrypt: true
    }
  }
});

var userObj = yield User.create({email: 'test@simpledyno.com', access_token: 'aW12k3KDASsd012Ms1Mf29Mc7', password: '******'})
return User.serialize(userObj, {format: 'scary'});

Example of running the local environment

// Import deps
import * as SimpleDyno from 'simple-dyno';

// Start a local DynamoDB
yield SimpleDyno.local();

// Create accociated tables for the following model(s)
SimpleDyno.load(User);

Todo

Fix CI by allowing Java to run on Travis
Migrations
Better docs (explain how AWS works)

How to contribute

Please create a pull request, make sure to include and update the tests and that they're working. And don't forget to build the minified version (with babel) with make simple-dyno.js.