Gem is not respecting the primary_key setting on indices

[maxhollmann]

Don't have time right now to create a proper pull request, but this monkey patch fixes it in my project:

class ThinkingSphinx::Deltas::DelayedDelta
  module SphinxQL
    def delete(index, instance)
      Delayed::Job.enqueue(
        ThinkingSphinx::Deltas::DelayedDelta::FlagAsDeletedJob.new(
          index.name,
          index.document_id_for_key(instance.send(index.options[:primary_key] || :id))
        ), self.class.job_options
      )
    end
  end
end

[pat]

Thanks, just made that change in 8866b0a28cdda8fae56c0efcf3b8df0bdf716427.