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Manage delta indexes via Delayed Job for Thinking Sphinx
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features
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README.textile
Rakefile
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ts-delayed-delta.gemspec

README.textile

Delayed Deltas for Thinking Sphinx

Installation

You’ll need Thinking Sphinx 1.3.0 or later, and Delayed Job as well. The latter is flagged as a dependency.

gem install ts-delayed-delta --source http://gemcutter.org

In your environment.rb file, with the rest of your gem dependencies:

config.gem 'ts-delayed-delta',
  :lib     => 'thinking_sphinx/deltas/delayed_delta'
  :version => '>= 1.0.0',
  :source  => 'http://gemcutter.org'

And add the following line to the bottom of your Rakefile:

require 'thinking_sphinx/deltas/delayed_delta/tasks'

If this is your first time running Delayed Job, then you’re going to need the jobs table migration as well:

script/generate delayed_job

For the indexes you want to use this delta approach, make sure you set that up in their define_index blocks.

define_index do
  # ...
  
  set_property :delta => :delayed
end

If you’ve never used delta indexes before, you’ll want to add the boolean column named delta to each model that is using the approach.

def self.up
  add_column :articles, :delta, :boolean, :default => true, :null => false
end

Usage

Once you’ve got it all set up, all you need to do is make sure that the delayed job process is running – either by Delayed Job’s built-in approach, or Thinking Sphinx’s custom rake task:

rake thinking_sphinx:delayed_delta

There’s also a short name for the same task, to save your fingers some effort:

rake ts:dd

Copyright

Copyright © 2009 Pat Allan, and released under an MIT Licence.

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