Multiple mappings per ActiveModel/Record?

Question

Lets say I want to create two separate indexes on something like BlogPosts, so that I can do a quick search using one index (for autocomplete purposes for example) then use the other index for full blown search querying.

Is that something I can do with Tire? so something like this (forgive me if its a little primitive)

class Post < ActiveRecord::Base
  include Tire::Model::Search
  include Tire::Model::Callbacks

   index_name 'autocomplete'
  mapping do
      indexes :title, :analyzer => 'my_ngram_analyzer'
  end

  index_name 'main'
  mapping do 
      indexes :title
      indexes :description
      indexes :author
      indexes :published_on
  end
end

where the callbacks know to add and remove new posts from the appropriate indexes

Answer 1

You can't do this in Tire, setting two separate indices (and mappings) in one class with the mapping DSL method.

It may be a good idea to use two separate indices, one for auto-completion, another for search. There's a nice tutorial, StackOverflow answer and even an elasticsearch plugin to get you started.

However, unless you have a lot of data, you'd be able to achieve that even with a single index, using the multi_field type, match query across multiple fields, and potentially an NGram based analyzer.

Check out the Autocomplete with Tire tutorial which outlines the approach.

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Cross-post from https://github.com/karmi/tire/issues/531