High performance real-time search (Support Chinese), index in Redis for Rails application

中文介绍和使用说明

You can try the search feature in IMAX.im | shu.im

And there is an Example App to show you how to use redis-search.

• Real-time search
• High performance
• Segment words search and prefix match search
• Support match with alias
• Support ActiveRecord and Mongoid
• Sort results by one field
• Homophone search, pinyin search
• Search as pinyin first chars
• Conditions support

• Redis 2.2+

1. In Rails application Gemfile

   gem 'ruby-pinyin'
   gem 'redis-search'

   $ bundle install

• Create file in: config/initializers/redis_search.rb

  require "redis"
  require "redis-namespace"
  require "redis-search"
  # don't forget change namespace
  redis = Redis.new(:host => "127.0.0.1",:port => "6379")
  # We suggest you use a special db in Redis, when you need to clear all data, you can use flushdb command to clear them.
  redis.select(3)
  # Give a special namespace as prefix for Redis key, when your have more than one project used redis-search, this config will make them work fine.
  redis = Redis::Namespace.new("your_app_name:redis_search", :redis => redis)
  Redis::Search.configure do |config|
    config.redis = redis
    config.complete_max_length = 100
    config.pinyin_match = true
    # use rmmseg, true to disable it, it can save memroy
    config.disable_rmmseg = false
  end

• Bind Redis::Search callback event, it will to rebuild search indices when data create or update.

  class Post
    include Mongoid::Document
    include Redis::Search
  
    field :title
    field :body
    field :hits
  
    belongs_to :user
    belongs_to :category
  
    redis_search_index(:title_field => :title,
                       :score_field => :hits,
                       :condition_fields => [:user_id, :category_id],
                       :ext_fields => [:category_name])
  
    def category_name
      self.category.name
    end
  end

  class User
    include Mongoid::Document
    include Redis::Search
  
    field :name
    field :alias_names, :type => Array
    field :tagline
    field :email
    field :followers_count
  
    redis_search_index(:title_field => :name,
                       :alias_field => :alias_names,
                       :prefix_index_enable => true,
                       :score_field => :followers_count,
                       :ext_fields => [:email,:tagline])
  end

  class SearchController < ApplicationController
    # GET /searchs?q=title
    def index
      Redis::Search.query("Post", params[:q], :conditions => {:user_id => 12})
    end
  
    # GET /search_users?q=j
    def search_users
      Redis::Search.complete("Post", params[:q], :conditions => {:user_id => 12, :category_id => 4})
    end
  end

Redis-Search index data to Redis from your model (pass name as CLASS environment variable).

$ rake redis_search:index:model CLASS='MyModel'

Customize the batch size:

$ rake redis_search:index:model CLASS='MyModel' BATCH=100

Redis-Search all index data to Redis from app/models (or use DIR environment variabl).

$ rake redis_search:index DIR=app/models

Customize the batch size:

$ rake redis_search:index DIR=app/models BATCH=100

• See Rdoc.info redis-search
• Example App

You can run the rake command (see Rakefile) to make test. There is my performance test result.

• https://gist.github.com/1150933

• MIT