add filter by paper_type

app/controllers/search_controller.rb

@@ -1,6 +1,9 @@
 class SearchController < ApplicationController
   def index
-    @response = Paper.search(params[:q])
+    @paper_type = params[:paper_type]
+    options = params.slice(:paper_type)
+
+    @response = Paper.search(params[:q], options)
     @papers = @response.page(params[:page]).results
     @paper_type_facets = @response.response['aggregations']['paper_types']['buckets'].map {|h| [ h['key'], h['doc_count']] }
     @originator_facets = @response.response['aggregations']['originators']['buckets'].map {|h| [ h['key'], h['doc_count']] }

app/models/paper.rb

@@ -43,10 +43,14 @@ class Paper < ActiveRecord::Base
     # use DSL to define search queries
     # see https://github.com/elastic/elasticsearch-ruby/tree/master/elasticsearch-dsl
     # and https://github.com/elastic/elasticsearch-rails/tree/master/elasticsearch-rails/lib/rails/templates
-    def search(q)
+    def search(q, options={})
       @search_definition = Elasticsearch::DSL::Search.search do
 
         query do
+          filtered do
+
+            query do
+              # search query
               unless q.blank?
                 multi_match do
                   query q
@@ -57,6 +61,17 @@ class Paper < ActiveRecord::Base
               end
             end
 
+            # filters
+            filter do
+              bool do
+                must { term paper_type: options[:paper_type] } if options[:paper_type]
+                must { match_all } unless options[:paper_type]
+              end
+            end
+
+          end
+        end
+
         aggregation :paper_types do
           terms do
             field 'paper_type'
@@ -70,7 +85,7 @@ class Paper < ActiveRecord::Base
         end
 
       end
-      puts @search_definition.to_hash
+      Rails.logger.debug "Query: #{@search_definition.to_json}"
       __elasticsearch__.search(@search_definition)
     end