Elasticsearch rails/ Elasticsearch model search model association - ruby-on-rails

Question

I have a model named Movie that looks like this:
class Movie < ActiveRecord::Base
include Elasticsearch::Model
include Elasticsearch::Model::Callbacks
has_many :actors, after_add: [ lambda {|a,c| a.__elasticsearch__.index_document}],
after_remove: [ lambda {|a,c| a.__elasticsearch__.index_document}]
settings index: {number_of_shards: 1} do
mappings dynamic: 'false' do
indexes :title, analyzer: 'snowball', boost: 100
indexes :actors
end
end
def as_indexed_json(options={})
self.as_json(
include: {
actors: { only: :name}
}
)
end
end
When i do Movie.first.as_indexed_json , I get:
{"id"=>6, "title"=>"Back to the Future ",
"created_at"=>Wed, 03 Dec 2014 22:21:24 UTC +00:00,
"updated_at"=>Fri, 12 Dec 2014 23:40:03 UTC +00:00,
"actors"=>[{"name"=>"Michael J Fox"}, {"name"=>"Christopher Lloyd"},
{"name"=>"Lea Thompson"}]}
but when i do Movie.search("Christopher Lloyd").records.first i get: => nil .
What changes can i make to the index to search movies associated with the searched actor?

Answer 1

I used filtering query to solve this, first I created an ActiveSupport::Concern called searchable.rb, the concern looks like this:
module Searchable
extend ActiveSupport::Concern
included do
include Elasticsearch::Model
include Elasticsearch::Model::Callbacks
index_name [Rails.application.engine_name, Rails.env].join('_')
settings index: { number_of_shards: 3, number_of_replicas: 0} do
mapping do
indexes :title, type: 'multi_field' do
indexes :title, analyzer: 'snowball'
indexes :tokenized, analyzer: 'simple'
end
indexes :actors, analyzer: 'keyword'
end
def as_indexed_json(options={})
hash = self.as_json()
hash['actors'] = self.actors.map(&:name)
hash
end
def self.search(query, options={})
__set_filters = lambda do |key, f|
#search_definition[:post_filter][:and] ||= []
#search_definition[:post_filter][:and] |= [f]
end
#search_definition = {
query: {},
highlight: {
pre_tags: ['<em class="label label-highlight">'],
post_tags: ['</em>'],
fields: {
title: {number_of_fragments: 0}
}
},
post_filter: {},
aggregations: {
actors: {
filter: {bool: {must: [match_all: {}]}},
aggregations: {actors: {terms: {field: 'actors'}}}
}
}
}
unless query.blank?
#search_definition[:query] = {
bool: {
should: [
{
multi_match: {
query: query,
fields: ['title^10'],
operator: 'and'
}
}
]
}
}
else
#search_definition[:query] = { match_all: {} }
#search_definition[:sort] = {created_at: 'desc'}
end
if options[:actor]
f = {term: { actors: options[:taxon]}}
end
if options[:sort]
#search_definition[:sort] = { options[:sort] => 'desc'}
#search_definition[:track_scores] = true
end
__elasticsearch__.search(#search_definition)
end
end
end
I have the above concern in the models/concerns directory.
In movies.rb I have:
class Movie < ActiveRecord::Base
include Searchable
end
In movies_controller.rb I am doing searching on the index action and the action looks like this:
def index
options = {
actor: params[:taxon],
sort: params[:sort]
}
#movies = Movie.search(params[q], options).records
end
Now when i go to http://localhost:3000/movies?q=future&actor=Christopher I get all records which have the word future on their title and has an actor with a name Christopher. You can have more than one filter as shown by the expert template of the example application templates found here .

Answer 2

You can try add method search to your model like this:
class Movie < ActiveRecord::Base
include Elasticsearch::Model
include Elasticsearch::Model::Callbacks
# ...
def self.search(query, options = {})
es_options =
{
query: {
query_string: {
query: query,
default_operator: 'AND',
}
},
sort: '_score',
}.merge!(options)
__elasticsearch__.search(es_options)
end
# ...
end
Here is some examples of method search: http://www.sitepoint.com/full-text-search-rails-elasticsearch/
And now you can search in all your indexed fields.

Answer 3

You need to specify the fields in the the search method, like:
def self.search query
__elasticsearch__.search(
query: {
multi_match: {
query: query,
fields: %w[title actor.name]
}
}
)
end

Answer 4

Try this
indexes :actors do
indexes :name, type: "string"
end