Make PaperSearch persistent

app/controllers/search_controller.rb

@@ -7,16 +7,30 @@ end
 
 class SearchController < ApplicationController
   def index
-    @search_definition = PaperSearch.new(params[:paper_search])
+    @search_definition = params[:paper_search].present? ? PaperSearch.new(search_params) : PaperSearch.new
     @search_definition.sort_by ||= "score"
 
-    @response = Paper.search(@search_definition)
+    execute_search
+  end
+
+  def show
+    @search_definition = PaperSearch.find params[:id]
+    execute_search
+    render action: "index"
+  end
+
+  private
+
+  def execute_search
+    @response = Paper.search(@search_definition.to_definition)
     @papers = @response.page(params[:page]).results
     @paper_type_facets = extract_facets('paper_types')
     @originator_facets = extract_facets('originators')
   end
 
-  private
+  def search_params
+    params.require(:paper_search).permit(:query, :paper_type, :originator, :sort_by)
+  end
 
   def extract_facets(name)
     @response.

app/models/paper_search.rb

@@ -1,12 +1,8 @@
-class PaperSearch
+class PaperSearch < ActiveRecord::Base
 
-  include ActiveModel::Model
-
-  attr_accessor :query, :paper_type, :originator, :sort_by
-
-  def to_hash
-    options = {paper_type: @paper_type, originator: @originator, sort_by: @sort_by}
-    PaperSearch.definition(@query, options)
+  def to_definition
+    options = {paper_type: paper_type, originator: originator, sort_by: sort_by}
+    PaperSearch.definition(query, options)
   end
 
   def self.definition(q, options={})

config/routes.rb

@@ -2,7 +2,8 @@ Rails.application.routes.draw do
   root to: redirect { |path_params| "/leipzig" }
 
   scope ':body' do
-    get '/' => 'search#index', as: :search
+    get '/'    => 'search#index', as: :search
+    get '/:id' => 'search#show', as: :saved_search
   end
 
   post '/auth/:provider/callback', to: 'sessions#create'