stadtratmonitor/app/models/paper_search.rb

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class PaperSearch < ActiveRecord::Base
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def to_definition
options = {paper_type: paper_type, originator: originator, sort_by: sort_by}
PaperSearch.definition(query, options)
end
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def self.definition(q, options={})
Elasticsearch::DSL::Search.search do
sort do
if options[:sort_by] == 'date'
by :published_at, order: 'desc'
end
by '_score'
end
query do
# search query
unless q.blank?
multi_match do
query q
fields ["name", "content"]
end
else
match_all
end
end
# apply filter after aggregations
post_filter do
bool do
must { term paper_type: options[:paper_type] } if options[:paper_type].present?
must { term originator: options[:originator] } if options[:originator].present?
# catchall when no filters set
must { match_all } unless (options[:paper_type].present? || options[:originator].present?)
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end
end
aggregation :paper_types do
# filter by originator
f = Elasticsearch::DSL::Search::Filters::Bool.new
f.must { match_all }
f.must { term originator: options[:originator] } if options[:originator].present?
filter f.to_hash do
aggregation :paper_types do
terms do
field 'paper_type'
end
end
end
end
aggregation :originators do
# filter by paper_type
f = Elasticsearch::DSL::Search::Filters::Bool.new
f.must { match_all }
f.must { term paper_type: options[:paper_type] } if options[:paper_type].present?
filter f.to_hash do
aggregation :originators do
terms do
field 'originator'
end
end
end
end
end
end
end