dynogels/examples/dynamicKeys.js

DynamoDB data mapper

'use strict';

const dynogels = require('../index');
const AWS = dynogels.AWS;
const Joi = require('joi');
const async = require('async');
const util = require('util');
const _ = require('lodash');

AWS.config.loadFromPath(`${process.env.HOME}/.ec2/credentials.json`);

const DynamicModel = dynogels.define('example-dynamic-key', {
  hashKey: 'id',
  timestamps: true,
  schema: Joi.object().keys({
    id: Joi.string()
  }).unknown()
});

const printResults = (err, resp) => {
  console.log('----------------------------------------------------------------------');
  if (err) {
    console.log('Error running scan', err);
  } else {
    console.log('Found', resp.Count, 'items');
    console.log(util.inspect(_.pluck(resp.Items, 'attrs')));

    if (resp.ConsumedCapacity) {
      console.log('----------------------------------------------------------------------');
      console.log('Scan consumed: ', resp.ConsumedCapacity);
    }
  }

  console.log('----------------------------------------------------------------------');
};

dynogels.createTables({
  'example-Account': { readCapacity: 1, writeCapacity: 10 },
}, err => {
  if (err) {
    console.log('Error creating tables', err);
    process.exit(1);
  }

  async.times(25, (n, next) => {
    const data = { id: `Model ${n}` };

    if (n % 3 === 0) {
      data.name = 'Dynamic Model the 3rd';
      data.age = 33;
    }

    if (n % 5 === 0) {
      data.email = `model_${n}@test.com`;
      data.settings = { nickname: 'Model the 5th' };
    }

    DynamicModel.create(data, next);
  }, () => {
    DynamicModel.scan().loadAll().exec(printResults);
  });
});