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A simple Ruby client for the parse.com REST API

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README.md

The original creator of parse-ruby-client, aalpern, has decided to stop work on the project. I'm going to give the project new life, first by maintaining the project as a gem, and second by eventually making it power parse_resource under the hood.

Ruby Client for parse.com REST API

This file implements a simple Ruby client library for using Parse's REST API. Rather than try to implement an ActiveRecord-compatible library, it tries to match the structure of the iOS and Android SDKs from Parse.

So far it supports simple GET, PUT, and POST operations on objects. Enough to read & write simple data.

Dependencies

This currently depends on the gems 'json' and 'patron' for JSON support and HTTP, respectively.

Getting Started

Installation

gem "parse-ruby-client", "~> 0.0.3"


To get started, load the parse.rb file and call Parse.init to initialize the client object with your application ID and API key values, which you can obtain from the parse.com dashboard.

require 'parse-ruby-client'

Parse.init :application_id => "<your_app_id>",
           :api_key        => "<your_api_key>"

If you don't like pasting this stuff in every time you fire up irb, save your api keys to .bash_profile or similar:

export PARSE_APPLICATION_ID="12345678"
export PARSE_REST_API_KEY="ABCDEFGH"

Now you can just do this:

Parse.init

The test folder assumes this naming convention for environment variables, so if you want to run the tests, you must do this. But it's easy. And good for you, too.

Creating and Saving Objects

Create an instance of Parse::Object with your class name supplied as a string, set some keys, and call save().

game_score = Parse::Object.new "GameScore"
game_score["score"]         = 1337
game_score["playerName"]    = "Sean Plott"
game_score["cheatMode"]     = false
game_score.save

Alternatively, you can initialize the object's initial values with a hash.

game_score = Parse::Object.new "GameScore", {
    "score" => 1337, "playerName" => "Sean Plott", "cheatMode" => false
}

Or if you prefer, you can use symbols for the hash keys - they will be converted to strings by Parse::Object.initialize().

game_score = Parse::Object.new "GameScore", {
        :score => 1337, :playerName => "Sean Plott", :cheatMode => false
}

Retrieving Objects

Individual objects can be retrieved with a single call to Parse.get() supplying the class and object id.

game_score = Parse.get "GameScore", "xWMyZ4YEGZ"

All the objects in a given class can be retrieved by omitting the object ID. Use caution if you have lots and lots of objects of that class though.

all_scores = Parse.get "GameScore"

Queries

Queries are supported by the Parse::Query class.

# Create some simple objects to query
(1..100).each { |i|
  score = Parse::Object.new "GameScore"
  score["score"] = i
  score.save
}

# Retrieve all scores between 10 & 20 inclusive
Parse::Query.new("GameScore")   \
  .greater_eq("score", 10)      \
  .less_eq("score", 20)         \
  .get

# Retrieve a set of specific scores
Parse::Query.new("GameScore")           \
  .value_in("score", [10, 20, 30, 40])  \
  .get

TODO

  • Add some form of debug logging
  • Support for Date, Pointer, and Bytes API data types
  • Users
  • ACLs
  • Login

Resources

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