Advanced Ultrasphinx: tags and filters

On a habr already wrote about Rails integration with the excellent search engine sphinx
Rails + Sphinx =? Part I
Rails and Sphinx.
In this article I will try to talk about additional features of the Ultrasphinx plugin.

Step # 1: Search by tags

We take out the following code in the UltrasphinxHelpers module and put it in “lib / ultrasphinx_helpers.rb”:
We write in the model:

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1. is_indexed :fields => ['title',"body"], :include => UltrasphinxHelpers::include_tags_configuration(self)

Consider the following example:

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1. class Article
2.     belongs_to :user
3.     is_indexed :fields => ["name","body","user_id"], :include => UltrasphinxHelpers::include_tags_configuration(self)
4. end
5.  
6. Ultrasphinx::Search.new(:query=>"ruby") # будут найдены все записи которые имеют слово "ruby" в поле "name" или "body" или тег "ruby"
7.  

If we want to search in only one field:

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1. Ultrasphinx::Search.new(:query=>"tag:ruby") #Выдаст только объекты которые затаганы тегом "ruby"
2. Ultrasphinx::Search.new(:query=>"name:*sphinx") #Будем искать только по имени, найдется все что содержит в имени слова с суффиксом sphinx

Step # 2: Search Only Among Specific Entries

And lastly, if we want to search only among the articles of our friends:

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1. friends_ids = current_user.friends.map(&:id) #[1,2,5,6,9,12]
2. Ultrasphinx::Search.new(:query=>"*sphinx",:filters=>{:user_id=> friends_ids})

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