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c3da11e Jan 18, 2014
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module Elasticsearch
module Model
# Allows to automatically update index based on model changes,
# by hooking into the model lifecycle.
#
# @note A blocking HTTP request is done during the update process.
# If you need a more performant/resilient way of updating the index,
# consider adapting the callbacks behaviour, and use a background
# processing solution such as [Sidekiq](http://sidekiq.org)
# or [Resque](https://github.com/resque/resque).
#
module Callbacks
# When included in a model, automatically injects the callback subscribers (`after_save`, etc)
#
# @example Automatically update Elasticsearch index when the model changes
#
# class Article
# include Elasticsearch::Model
# include Elasticsearch::Model::Callbacks
# end
#
# Article.first.update_attribute :title, 'Updated'
# # SQL (0.3ms) UPDATE "articles" SET "title" = ...
# # 2013-11-20 15:08:52 +0100: POST http://localhost:9200/articles/article/1/_update ...
#
def self.included(base)
adapter = Adapter.from_class(base)
base.__send__ :include, adapter.callbacks_mixin
end
end
end
end