[groonga-talk:315] [ANN] Rroonga 6.0.0

[Masafumi Y. <yok...@cl...>]

Hi,

Rroonga 6.0.0 has been released on March 6.
It's a major upgrade for the first time in this year!

Web: http://ranguba.org/#about-rroonga
GitHub: https://github.com/ranguba/rroonga

Here are changes since Rroonga 5.1.1:
   http://ranguba.org/rroonga/en/file.news.html#version-6-0-0

About Rroonga
-------------

Rroonga is the Ruby bindings for Groonga.
Here are two important concepts in Rroonga.

   1. Providing *Ruby-ish* API to use Groonga.
   2. Providing *fast* operations like Groonga.

They mean that Rroonga provides easy to use API from Ruby without
decreasing Groonga's speed.

Install
-------

   % gem install rroonga

Tutorial
--------

There are a tutorial that uses irb:
   http://ranguba.org/rroonga/en/file.tutorial.html

If you are a newbie for Rroonga, please try it.

Topics
------

This release has a backward incompatible change for Groonga::Table#select
with a number object:

Disabled auto conversion to record ID from number object in condition block.
The number object is treated as key not ID from this release. Because we
couldn't specify Int/UInt related type key as number object. The number
object was always treated as ID not key.

For example:

      Groonga::Schema.define do |schema|
        schema.create_table("Users", key_type: :integer) do |table|
          table.short_text("name")
        end
        schema.create_table("Records", type: :array) do |table|
          table.reference("user", "Users")
        end
      end

      users = Groonga["Users"]
      alice = users.add(2, name: "Alice")
      p alice.id # => 1
      bob = users.add(1, name: "Bob")
      p bob.id # => 2

      records = Groonga["Records"]
      records.add(user: alice)
      records.add(user: bob)

      selected_records = records.select do |record|
        record.user == 1
      end
      p selected_records.collect {|record| record.user.name}
      # Returns ["Alice"] in Rroonga 5.1.1
      # Returns ["Bob"] in Rroonga 6.0.0

If you want to specify record ID as right hand side value in 6.0.0, you
need to pass Groonga::Record:

      selected_records = records.select do |record|
        record.user == alice
      end


Regards,
--
Masafumi Yokoyama