使用方法

配置文件路径: config/initializers/redis_search.rb

# -*- coding: utf-8 -*-
require redis
require redis-namespace
require redis-search


begin
  redis = Redis.new(:host => 127.0.0.1,:port => 6379)
  redis.select(3)


  redis = Redis::Namespace.new(you_app_name:redis_search, :redis => redis)
  Redis::Search.configure do |config|
    config.redis = redis
    config.complete_max_length = 100
    config.pinyin_match = true
    # 是否关闭中文分词，true为关闭，可节省内存占用
    config.disable_rmmseg = true
  end
rescue
  p redis server not running
end

为模块做索引

class User < ActiveRecord::Base
  include Redis::Search


  def hits
    # 计算权重
  end


  redis_search_index(:title_field => :name, #主要索引域
                     :alias_field => :login,  #次要的索引域
                     :score_field => :hits, #传入一个方法名，根据方法返回值来确定权重
                     :prefix_index_enable => true, #逐字索引，逐字搜索时开启
                     :condition_fields => [:role], #条件，传入的是一组字段，搜索时可以以          
                                                   :conditions => {:role => :admin}) 的方法使用。
                     :ext_fields => [:email, :created_at]) #其余需要索引的域
end


# 重新build索引
rake redis_search:index

搜索

# 逐字搜索
Redis::Search.complete(User, params[:query], :conditions => {:role => :admin})


# 全文搜索
Redis::Search.query(User, params[:query], :conditions => {:role => :admin})