#307 ElasticSearch Part 2 pro

rake environment tire:import CLASS=Article FORCE=true

gem 'tire'
gem 'will_paginate'

include Tire::Model::Search
include Tire::Model::Callbacks

mapping do
  indexes :id, type: 'integer'
  indexes :author_id, type: 'integer'
  indexes :author_name
  indexes :name, boost: 10
  indexes :content # analyzer: 'snowball'
  indexes :published_at, type: 'date'
  indexes :comments_count, type: 'integer'
end

def self.search(params)
  tire.search(page: params[:page], per_page: 2) do
    query do
      boolean do
        must { string params[:query], default_operator: "AND" } if params[:query].present?
        must { range :published_at, lte: Time.zone.now }
        must { term :author_id, params[:author_id] } if params[:author_id].present?
      end
    end
    sort { by :published_at, "desc" } if params[:query].blank?
    facet "authors" do
      terms :author_id
    end
    # raise to_curl
  end
end

# self.include_root_in_json = false (necessary before Rails 3.1)
def to_indexed_json
  to_json(methods: [:author_name, :comments_count])
end

def author_name
  author.name
end

def comments_count
  comments.size
end

<%= form_tag articles_path, method: :get do %>
  <p>
    <%= text_field_tag :query, params[:query] %>
    <%= submit_tag "Search", name: nil %>
  </p>
<% end %>

<div id="facets">
  <h3>Authors</h3>
  <ul>
    <% @articles.facets['authors']['terms'].each do |facet| %>
      <li>
        <%= link_to_unless_current Author.find(facet['term']).name, params.merge(author_id: facet['term']) %>
        <% if params[:author_id] == facet['term'].to_s %>
          (<%= link_to "remove", author_id: nil %>)
        <% else %>
          (<%= facet['count'] %>)
        <% end %>
      </li>
    <% end %>
  </ul>
</div>

<div id="articles">
<% @articles.each do |article| %>
  <h2>
    <%= link_to article.name, article %>
    <span class="comments">(<%= pluralize(article.comments_count, 'comment') %>)</span>
  </h2>
  <div class="info">
    by <%= article.author_name %>
    on <%= article.published_at.to_time.strftime('%b %d, %Y') %>
  </div>
  <div class="content"><%= article.content %></div>
<% end %>
</div>

<%= will_paginate @articles %>