Full-text search using acts_as_ferret

Acts_as_ferret is a plug-in for full-text search in rails. It is implemented based on ferret and ferret is the ruby interface of Apache Lucene. Acts_as_ferret has many introductions on the Internet and many tutorials. It is the most important full-text search plug-in for rails in the early days. However, it is a waste of time to support Chinese search by foreigners, the implementation of Chinese support in javaeye is also unsatisfactory, and the reference value is increasingly lost due to its long history. Therefore, before giving up using acts_as_ferret, I would like to introduce in detail how to use acts_as_ferret for full-text retrieval in Chinese. It is a record filing and may be used in the future.

Install gem independently

Do not install plug-ins or unpack them into your project. The reason is not clear, but this is my blood lesson!

 
Gem install ferret-V = 0.11.5 -- platform mswin32gem install acts_as_ferretgem install rmmseg
 

ThenC: \ Ruby \ Lib \ Ruby \ gems \ 1.8 \ gems \ ferret-0.11.5-x86-mswin32 \ extCopying ferret_ext.so in the directoryC: \ Ruby \ Lib \ Ruby \ gems \ 1.8 \ gems \ ferret-0.11.5-x86-mswin32 \ LibNext!

Associated gem

Add in environment. RB of your project

Config. Gem 'ferret 'config. G' rmmseg 'config. G' acts _ as_ferret'
 

Add index support for models

 
Require 'rmmseg' require 'rmmseg/ferret 'class topic {: Title =>{: store =>: Yes,: boost => 20 # Set weight },: body =>{: boost => 1,: store =>: Yes,: term_vector =>: with_positions_offsets},: Author =>{: store =>: Yes },: created_at_s =>{: index =>: untokenized,: store =>: Yes},: updated_at_s =>{: index =>: untokenized,: store =>: Yes }},: store_class_name => true,: analyzer => rmmseg: ferret: analyzer. new }) Def created_at_s created_at.to_s (: DB) end def updated_at_s updated_at.to_s (: DB) end def body first_post.body end #............................................................ Other implementations ........................................................................ End
 

 require 'rmmseg' require 'rmmseg/ferret 'class post: topic # If you want to re-create an index, you only need to delete the corresponding folder and restart the service. You can also use the model. rebuild_index method #================================ search part ================ ========= acts_as_ferret ({: fields =>{: title =>{: store =>: Yes,: boost => 20 # Set weight},: Body =>{: boost => 1 ,: store =>: Yes,: term_vector =>: with_positions_offsets},: Author => {: store =>: Yes },: Created_at_s =>{: index =>: untokenized,: store =>: Yes},: updated_at_s =>{: index =>: untokenized,: store =>: yes }},: store_class_name => true,: analyzer => rmmseg: ferret: analyzer. new}) def created_at_s created_at.to_s (: DB) end def updated_at_s updated_at.to_s (: DB) end #............................................................ Other implementations ........................................................................ End 

Here: analyzer => rmmseg: ferret: analyzer. New adds the Chinese word segmentation capability for us.

Create search Module

 
Ruby script/generate controller search index
 

Add routing rules.

 
Map. Online '/seach',: controller => 'seach ',: Action => 'index'
 

Modify search_controller.

Class searchcontroller
 
Modify the corresponding View:
 
<% Form_tag '/search',: method =>: Get,: Style => "margin-left: 40% "do %> <input type =" radio "name =" class "value =" topic "<% = @ class =" topic "? 'Checked = "checked "': ''%> only subject posts <input type =" radio "name =" class "value =" Post "<% = @ class =" Post "? 'Checked = "checked" ': ''%> All posts <br> <p> <% = text_field_tag: Query, @ query %> <% = submit_tag" Search ",: Name => nil %> </P> <% end %> <% if defined? @ Results %> <style type = "text/CSS">. hilite {color: # 0042bd; Background: # f345cc ;}</style> <Div id = "search_result" ><%@ results. each do | result | %> 
Another highlight scheme.
 
 
Def hilight (a, B) # A is the string to be highlighted, B is the highlighted part, and the highlighted style is hilite highlight a, B ,'\ 1'End 250), @ query %>
Author: posting time
 
Paging
 
Add application_controller.rb
 
 
Def pages_for (result, Options = {}) page, per_page, total = (options [: Page] | 1), (options [: per_page] | 30 ), (result. total_hits | 0) page_total = page * per_page Index = (page. to_ I-1) * per_page returning willpaginate: collection. new (page, per_page, total) Do | pager. replace result [index, per_page] end
 
 
Modify controller:
 
Class searchcontroller 3,: page => (Params [: Page] | 1) else Results = post. find_with_ferret @ query @ Results = pages_for (results,: per_page => 3,: page => (Params [: Page] | 1) end endend
 
 
Add a sentence at the bottom of the corresponding view (using the will_paginate plug-in)
 
<% Form_tag '/search',: method =>: Get,: Style => "margin-left: 40% "do %> <input type =" radio "name =" class "value =" topic "<% = @ class =" topic "? 'Checked = "checked "': ''%> only subject posts <input type =" radio "name =" class "value =" Post "<% = @ class =" Post "? 'Checked = "checked" ': ''%> All posts <br> <p> <% = text_field_tag: Query, @ query %> <% = submit_tag" Search ",: Name => nil %> </P> <% end %> <% if defined? @ Results %> <style type = "text/CSS">. hilite {color: # 0042bd; Background: # f345cc ;}</style> <Div id = "search_result" ><%@ results. each do | result | %> Product Environment
 
   
 
  
    
 
     
In the model, acts_as_ferret: Remote => true indicates that remote is true.
 
     
Copy the ferret_server.yml in the directory of Vendor/plugins/acts_as_ferret/config/to config /.
 
     
Ruby script/runner vendor/plugins/acts_as_ferret/script/ferret_server-e Production
 
    
 
 
   
Some useful links
 
Http://www.pluitsolutions.com/2007/07/30/acts-as-ferret-drbserver-win32-service/
 
 
Http://ferret.davebalmain.com/api/classes/Ferret/Index.html