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A simple, extensible Ruby client for Apache Solr.
The code docs www.rubydoc.info/gems/rsolr
gem install rsolr
require 'rubygems' require 'rsolr' # Direct connection solr = RSolr.connect :url => 'http://solrserver.com' # Connecting over a proxy server solr = RSolr.connect :url => 'http://solrserver.com', :proxy=>'http://user:pass@proxy.example.com:8080' # send a request to /select response = solr.get 'select', :params => {:q => '*:*'} # send a request to /catalog response = solr.get 'catalog', :params => {:q => '*:*'}
When the Solr :wt is :ruby, then the response will be a Hash. This Hash is the same object returned by Solr, but evaluated as Ruby. If the :wt is not :ruby, then the response will be a String.
The response also exposes 2 attribute readers (for any :wt value), :request and :response. Both are Hash objects with symbolized keys.
The :request attribute contains the original request context. You can use this for debugging or logging. Some of the keys this object contains are :uri, :query, :method etc..
The :response attribute contains the original response. This object contains the :status, :body and :headers keys.
The read and connect timeout settings can be set when creating a new instance of RSolr:
solr = RSolr.connect(:read_timeout => 120, :open_timeout => 120)
A 503 is usually a temporary error which RSolr may retry if requested. You may specify the number of retry attempts with the :retry_503 option.
Only requests which specify a Retry-After header will be retried, after waiting the indicated retry interval, otherwise RSolr will treat the request as a 500. You may specify a maximum Retry-After interval to wait with the :retry_after_limit option (default: one second).
solr = RSolr.connect(:retry_503 => 1, :retry_after_limit => 1)
Use the #get / #post method to send search requests to the /select handler:
response = solr.get 'select', :params => { :q=>'washington', :start=>0, :rows=>10 } response["response"]["docs"].each{|doc| puts doc["id"] }
The :params sent into the method are sent to Solr as-is, which is to say they are converted to Solr url style, but no special mapping is used. When an array is used, multiple parameters *with the same name* are generated for the Solr query. Example:
solr.get 'select', :params => {:q=>'roses', :fq=>['red', 'violet']}
The above statement generates this Solr query:
select?q=roses&fq=red&fq=violet
To paginate through a set of Solr documents, use the paginate method:
solr.paginate 1, 10, "select", :params => {:q => "test"}
The first argument is the current page, the second is how many documents to return for each page. In other words, “page” is the “start” Solr param and “per-page” is the “rows” Solr param.
The paginate method returns WillPaginate ready “docs” objects, so for example in a Rails application, paginating is as simple as:
<%= will_paginate @solr_response["response"]["docs"] %>
The RSolr::Client class also uses method_missing for setting the request handler/path:
solr.paintings :params => {:q=>'roses', :fq=>['red', 'violet']}
This is sent to Solr as:
paintings?q=roses&fq=red&fq=violet
This works with pagination as well:
solr.paginate_paintings 1, 10, {:q=>'roses', :fq=>['red', 'violet']}
There may be cases where the query string is too long for a GET request. RSolr solves this issue by converting hash objects into form-encoded strings:
response = solr.music :data => {:q => "*:*"}
The :data hash is serialized as a form-encoded query string, and the correct content-type headers are sent along to Solr.
There may be cases where you’d like to send a HEAD request to Solr:
solr.head("admin/ping").response[:status] == 200
Solr responds to the request headers listed here: wiki.apache.org/solr/SolrAndHTTPCaches To send header information to Solr using RSolr, just use the :headers option:
response = solr.head "admin/ping", :headers => {"Cache-Control" => "If-None-Match"}
RSolr::Client provides a method for building a request context, which can be useful for debugging or logging etc.:
request_context = solr.build_request "select", :data => {:q => "*:*"}, :method => :post, :headers => {}
To build a paginated request use build_paginated_request:
request_context = solr.build_paginated_request 1, 10, "select", ...
Updating is done using native Ruby objects. Hashes are used for single documents and arrays are used for a collection of documents (hashes). These objects get turned into simple XML “messages”. Raw XML strings can also be used.
Single document via #add
solr.add :id=>1, :price=>1.00
Multiple documents via #add
documents = [{:id=>1, :price=>1.00}, {:id=>2, :price=>10.50}] solr.add documents
The optional :add_attributes hash can also be used to set Solr “add” document attributes:
solr.add documents, :add_attributes => {:commitWithin => 10}
Raw XML via #update
solr.update :data => '<commit/>' solr.update :data => '<optimize/>'
When adding, you can also supply “add” xml element attributes and/or a block for manipulating other “add” related elements (docs and fields) by calling the xml method directly:
doc = {:id=>1, :price=>1.00} add_attributes = {:allowDups=>false, :commitWithin=>10} add_xml = solr.xml.add(doc, add_attributes) do |doc| # boost each document doc.attrs[:boost] = 1.5 # boost the price field: doc.field_by_name(:price).attrs[:boost] = 2.0 end
Now the “add_xml” object can be sent to Solr like:
solr.update :data => add_xml
Delete by id
solr.delete_by_id 1
or an array of ids
solr.delete_by_id [1, 2, 3, 4]
Delete by query:
solr.delete_by_query 'price:1.00'
Delete by array of queries
solr.delete_by_query ['price:1.00', 'price:10.00']
solr.commit, :commit_attributes => {}
solr.optimize, :optimize_attributes => {}
The default response format is Ruby. When the :wt param is set to :ruby, the response is eval’d resulting in a Hash. You can get a raw response by setting the :wt to +“ruby”+ - notice, the string – not a symbol. RSolr will eval the Ruby string ONLY if the :wt value is :ruby. All other response formats are available as expected, +:wt=>‘xml’+ etc..
solr.get 'select', :params => {:wt => :ruby} # notice :ruby is a Symbol
solr.get 'select', :params => {:wt => 'ruby'} # notice 'ruby' is a String
solr.get 'select', :params => {:wt => :xml}
solr.get 'select', :params => {:wt => :json}
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RSolr Google Group – The RSolr discussion group
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rsolr-ext – An extension kit for RSolr
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rsolr-direct – JRuby direct connection for RSolr
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rsolr-nokogiri – Gives RSolr Nokogiri for XML generation.
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SunSpot – An awesome Solr DSL, built with RSolr
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Blacklight – A “next generation” Library OPAC, built with RSolr
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java_bin – Provides javabin/binary parsing for RSolr
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Solr – The Apache Solr project
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solr-ruby – The original Solr Ruby Gem!
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Fork the project.
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Make your feature addition or bug fix.
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Add tests for it. This is important so I don’t break it in a future version unintentionally.
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Commit, do not mess with rakefile, version, or history (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
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Send me a pull request. Bonus points for topic branches.
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Nathan Witmer
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Magnus Bergmark
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shima
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Randy Souza
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Mat Brown
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Jeremy Hinegardner
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Denis Goeury
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shairon toledo
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Rob Di Marco
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Peter Kieltyka
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Mike Perham
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Lucas Souza
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Dmitry Lihachev
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Antoine Latter
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Naomi Dushay
Matt Mitchell <goodieboy@gmail.com>
Copyright © 2008-2010 Matt Mitchell. See LICENSE for details.