api.md

Cardboard

index.js:37-579

Cardboard client generator

Parameters

• config object a configuration object
  • config.mainTable string the name of a DynamoDB table to connect to
  • config.region string the AWS region containing the DynamoDB table
  • config.dyno [dyno] a pre-configured dyno client for connecting to DynamoDB

Examples

var cardboard = require('cardboard')({
  table: 'my-cardboard-table',
  region: 'us-east-1',
});

var cardboard = require('cardboard')({
  dyno: require('dyno')(dynoConfig),
});

Returns cardboard a cardboard client

put

Parameters

• input Feature|FeatureCollection a GeoJSON object to write to the database
• dataset string the dataset to write the feature to
• callback function the callback for the error and repsonse to be passed to

Examples

// Create a point, then retrieve it.
var feature = {
  type: 'Feature',
  properties: {},
  geometry: {
    type: 'Point',
    coordinates: [0, 0]
  }
};

cardboard.put(feature, 'my-dataset', function(err, result) {
  err === undefined; // no error
  result.features.length === 1; // one feature was added
  result.features[0].id === 'random-id'; // that is a bit more random
});

del

Delete features from a dataset

Parameters

• input string|Array(string) the feature ids
• dataset string the id of the dataset that these features belong to
• callback function the callback function to handle the response

Examples

carboard.del('feature-id', 'dataset-id', function(err) {
  err === undefined; // unless something is really broken
});

carboard.del(['feature-one', 'feature-two'], 'dataset-id', function(err) {
  err === undefined; // unless something is really broken
});

get

Retrieve a feature collection for a list of feature ids

Parameters

• input string|Array(string) the feature ids
• dataset string the id of the dataset that these features belong to
• callback function the callback function to handle the response

Examples

cardboard.get('feature-id', 'my-dataset', function(err, final) {
  if (err) throw err;
  final.features[0].id === 'feature-id'; // true: the feature was retrieved
});

// get multiple features at once
cardboard.get(['one', 'two'], 'my-dataset', function(err, result) {
  err === undefined;
  result.features.length === 2; // a feature for each id
});

// Attempt to retrieve a feature that does not exist
cardboard.get('non-existent-feature', 'my-dataset', function(err, result) {
  err === undefined; // this is not an error
  result.features.length === 0; // nothing was found
});

createTable

Create a DynamoDB table with Cardboard's schema

Parameters

• callback function the callback function to handle the response

Examples

// Create the cardboard table specified by the client config
cardboard.createTable(function(err) {
  if (err) throw err;
});