Delayed Deltas for Thinking Sphinx (with Resque)

This code is HEAVILY borrowed from ts-delayed-delta.

This gem depends on the following gems: thinking-sphinx and resque.

Currently, you'll need Thinking Sphinx v1.5.0 (for Rails 2), v2.1.0 (for Rails 3), or - ideally - v3.0.3 or newer (for Rails 3.1 onwards). If you're on a version of Thinking Sphinx that's too old, you better go upgrade - but otherwise, add ts-resque-delta to your Gemfile file with the rest of your gem dependencies:

gem 'ts-resque-delta', '~> 2.0.0'

Add the delta property to index definition. If you're using Thinking Sphinx v3, then it'll look something like this:

ThinkingSphinx::Index.define(:article,
  :with  => :active_record,
  :delta => ThinkingSphinx::Deltas::ResqueDelta
) do
  # fields and attributes and so on...
end

But if you're still using v1.5 or v2.1, you'll want the following:

define_index do
  # fields and attributes and so on...

  set_property :delta => ThinkingSphinx::Deltas::ResqueDelta
end

If you've never used delta indexes before, you'll need to add the boolean column named :delta to each table for indexed models. A database index for that column is also recommended.

def change
  add_column :articles, :delta, :boolean, :default => true, :null => false
  add_index  :articles, :delta
end

Once you've got it all set up, all you need to do is make sure that the Resque worker is running. You can do this by specifying the ts_delta queue when running Resque:

QUEUE=ts_delta,other_queues rake resque:work

• Aaron Gibralter
• Ryan Schlesinger (Locking/smart_index)
• Pat Allan (FlyingSphinx support)
• James Richard

• Pat Allan
• Ryan Schlesinger (Allowing installs as a plugin)
• Maximilian Schulz (Ensuring compatibility with Bundler)
• Edgars Beigarts (Adding intelligent description for tasks)
• Alexander Simonov (Explicit table definition)

Copyright (c) 2011-2014 Aaron Gibralter and Pat Allan, and released under an MIT Licence.