paper_type facets

app/controllers/search_controller.rb

@@ -1,5 +1,7 @@
 class SearchController < ApplicationController
   def index
-    @papers = Paper.search(params[:q]).page(params[:page]).results
+    @response = Paper.search(params[:q])
+    @papers = @response.page(params[:page]).results
+    @paper_type_facets = @response.response['aggregations']['paper_types']['buckets'].map {|h| [ h['key'], h['doc_count']] }
   end
 end

app/models/paper.rb

@@ -9,6 +9,15 @@ class Paper < ActiveRecord::Base
   validates_presence_of :published_at, allow_nil: true
   validates :url, uniqueness: true
 
+  settings index: { number_of_shards: 1 } do
+    mappings dynamic: false do
+      indexes :name, type: :string
+      indexes :content, type: :string
+      indexes :resolution, type: :string
+      indexes :paper_type, type: :string, index: :not_analyzed
+    end
+  end  
+
   class << self
     def import_from_json(json_string)
       old_count = count
@@ -35,6 +44,7 @@ class Paper < ActiveRecord::Base
     # and https://github.com/elastic/elasticsearch-rails/tree/master/elasticsearch-rails/lib/rails/templates
     def search(q)
       @search_definition = Elasticsearch::DSL::Search.search do
+
         query do
           unless q.blank?
             multi_match do
@@ -45,10 +55,22 @@ class Paper < ActiveRecord::Base
             match_all
           end
         end
+
+        aggregation :paper_types do
+          terms do
+            field 'paper_type'
+          end
+        end
+
       end
       puts @search_definition.to_hash
       __elasticsearch__.search(@search_definition)
     end
 
+    def reset_index!
+      __elasticsearch__.create_index! force: true
+      all.each {|p| p.__elasticsearch__.index_document }
+    end
+
   end
 end

app/views/search/index.html.slim

@@ -1,6 +1,13 @@
 div
   = render 'search/form'
 
+.row
+  .small-4.columns
+    ul
+    - @paper_type_facets.each do |paper_type, count|
+      li.facet
+        = "#{paper_type} (#{count})"
+
 .clearfix
   - if params[:q].present?
     .left