Simple ruby client for Amazon DynamoDB
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README.md

rdy

Fun little ruby client for Amazon DynamoDB.

# hash-key based tables
rdy = Rdy.new("your_table", [:your_hash_key, :string])
rdy.any_attribute = "nice!"
rdy.foo = "bar"
rdy.save("1") # set your hash key value
# rdy.save # if ommitted the hash key value is generated

rdy.foo = "bar2"
rdy.save # update

rdy.any_attribute = nil
rdy.save # delete an attribute

rdy.find("1") # find by hash key value / sets values to current instance
rdy_instance = Rdy.find("your_table", [:your_hash_key, :string, 'mykey1']) # returns new Rdy instance

rdy.destroy # delete item

rdy_instance = Rdy.create('your_table', [:your_hash_key, :string, "your_hash_key"], nil, {"foo" => "bar"})

rdy.all
rdy.count

rdy.scan(:any_attribute => 'nice!')
limit = 10
rdy.scan(:any_attribute => 'nice!', limit)

# hash & range-key based tables
rdy2 = Rdy.new("your_table", [:your_hash_key, :string], [:your_range_key, :number])
rdy2.your_range_key = 1
rdy2.save('mykey1') # or just rdy2.save

rdy_instance = Rdy.create('your_table', [:your_hash_key, :string, "your_hash_value"], [:your_range_key, :number, 1], {"foo" => "bar"})

rdy2.find('mykey1', 1) # sets item values to current instance
rdy_instance = Rdy.find("your_table", [:your_hash_key, :string, 'mykey1'], [:your_range_key, :number, 1]) # returns new Rdy instance

rdy2.query(:hash_value => 'mykey1', :range_value => 1)
rdy2.query_by_range_value(1)

read_capacity_units = 10
write_capacity_units = 5
Rdy.create_table("rdy", read_capacity_units, write_capacity_units, :id => :string) # hash key only
Rdy.create_table("rdy2", read_capacity_units, write_capacity_units, {:id => :string}, {:comment_id => :number}) # hash and range key

# You can also create your own class
class User < RdyItem
    def initialize(hash_key, range_key) # this will save data to the 'users' table
        super(hash_key, range_key)
    end
end

user = User.new([:your_hash_key, :string], [:your_range_key, :number])

Installation

gem install rdy

Create a .rdy.yml file with your AWS credentials in your home directory. Checkout the sample file for help. Also make sure you activate DynamoDB in your AWS account.

Tests

rake test

On the initial run the tables are created. This may take a while, so it's possible the first run of the tests is going to fail. You can also create the tables manually if you want to avoid this. Check out the helper.rb class.

Contributing to rdy

  • Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
  • Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
  • Fork the project
  • Start a feature/bugfix branch
  • Commit and push until you are happy with your contribution
  • Make sure to add tests for it. This is important so I don't break it in a future version unintentionally.
  • Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

Copyright

Copyright (c) 2012 Oliver Kiessler. See LICENSE.txt for further details.