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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
module Elasticsearch
module Model
module Adapter
# An adapter for Mongoid-based models
#
# @see http://mongoid.org
#
module Mongoid
Adapter.register self,
lambda { |klass| !!defined?(::Mongoid::Document) && klass.respond_to?(:ancestors) && klass.ancestors.include?(::Mongoid::Document) }
module Records
# Return a `Mongoid::Criteria` instance
#
def records
criteria = klass.where(:id.in => ids)
criteria.instance_exec(response.response['hits']['hits']) do |hits|
define_singleton_method :to_a do
self.entries.sort_by { |e| hits.index { |hit| hit['_id'].to_s == e.id.to_s } }
end
end
criteria
end
# Intercept call to sorting methods, so we can ignore the order from Elasticsearch
#
%w| asc desc order_by |.each do |name|
define_method name do |*args|
criteria = records.__send__ name, *args
criteria.instance_exec do
define_singleton_method(:to_a) { self.entries }
end
criteria
end
end
end
module Callbacks
# Handle index updates (creating, updating or deleting documents)
# when the model changes, by hooking into the lifecycle
#
# @see http://mongoid.org/en/mongoid/docs/callbacks.html
#
def self.included(base)
base.after_create { |document| document.__elasticsearch__.index_document }
base.after_update { |document| document.__elasticsearch__.update_document }
base.after_destroy { |document| document.__elasticsearch__.delete_document }
end
end
module Importing
# Fetch batches of records from the database
#
# @see https://github.com/mongoid/mongoid/issues/1334
# @see https://github.com/karmi/retire/pull/724
#
def __find_in_batches(options={}, &block)
batch_size = options[:batch_size] || 1_000
query = options[:query]
named_scope = options[:scope]
preprocess = options[:preprocess]
scope = all
scope = scope.send(named_scope) if named_scope
scope = query.is_a?(Proc) ? scope.class_exec(&query) : scope.where(query) if query
scope.no_timeout.each_slice(batch_size) do |items|
yield (preprocess ? self.__send__(preprocess, items) : items)
end
end
def __transform
lambda {|a| { index: { _id: a.id.to_s, data: a.as_indexed_json } }}
end
end
end
end
end
end
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