Class: Riddle::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/riddle/client.rb,
lib/riddle/client/filter.rb,
lib/riddle/client/message.rb,
lib/riddle/client/response.rb

Overview

This class was heavily based on the existing Client API by Dmytro Shteflyuk and Alexy Kovyrin. Their code worked fine, I just wanted something a bit more Ruby-ish (ie. lowercase and underscored method names). I also have used a few helper classes, just to neaten things up.

Feel free to use it wherever. Send bug reports, patches, comments and suggestions to pat at freelancing-gods dot com.

Most properties of the client are accessible through attribute accessors, and where relevant use symboles instead of the long constants common in other clients. Some examples:

client.sort_mode  = :extended
client.sort_by    = "birthday DESC"
client.match_mode = :extended

To add a filter, you will need to create a Filter object:

client.filters << Riddle::Client::Filter.new("birthday",
  Time.at(1975, 1, 1).to_i..Time.at(1985, 1, 1).to_i, false)

Defined Under Namespace

Classes: Filter, Message, Response

Constant Summary collapse

Commands = 
{
  :search   => 0, # SEARCHD_COMMAND_SEARCH
  :excerpt  => 1, # SEARCHD_COMMAND_EXCERPT
  :update   => 2, # SEARCHD_COMMAND_UPDATE
  :keywords => 3  # SEARCHD_COMMAND_KEYWORDS
}
Versions = 
{
  :search   => 0x113, # VER_COMMAND_SEARCH
  :excerpt  => 0x100, # VER_COMMAND_EXCERPT
  :update   => 0x101, # VER_COMMAND_UPDATE
  :keywords => 0x100  # VER_COMMAND_KEYWORDS
}
Statuses = 
{
  :ok      => 0, # SEARCHD_OK
  :error   => 1, # SEARCHD_ERROR
  :retry   => 2, # SEARCHD_RETRY
  :warning => 3  # SEARCHD_WARNING
}
MatchModes = 
{
  :all        => 0, # SPH_MATCH_ALL
  :any        => 1, # SPH_MATCH_ANY
  :phrase     => 2, # SPH_MATCH_PHRASE
  :boolean    => 3, # SPH_MATCH_BOOLEAN
  :extended   => 4, # SPH_MATCH_EXTENDED
  :fullscan   => 5, # SPH_MATCH_FULLSCAN
  :extended2  => 6  # SPH_MATCH_EXTENDED2
}
RankModes = 
{
  :proximity_bm25 => 0, # SPH_RANK_PROXIMITY_BM25
  :bm25           => 1, # SPH_RANK_BM25
  :none           => 2, # SPH_RANK_NONE
  :wordcount      => 3  # SPH_RANK_WORDCOUNT
}
SortModes = 
{
  :relevance     => 0, # SPH_SORT_RELEVANCE
  :attr_desc     => 1, # SPH_SORT_ATTR_DESC
  :attr_asc      => 2, # SPH_SORT_ATTR_ASC
  :time_segments => 3, # SPH_SORT_TIME_SEGMENTS
  :extended      => 4, # SPH_SORT_EXTENDED
  :expr          => 5  # SPH_SORT_EXPR
}
AttributeTypes = 
{
  :integer    => 1, # SPH_ATTR_INTEGER
  :timestamp  => 2, # SPH_ATTR_TIMESTAMP
  :ordinal    => 3, # SPH_ATTR_ORDINAL
  :bool       => 4, # SPH_ATTR_BOOL
  :float      => 5, # SPH_ATTR_FLOAT
  :multi      => 0x40000000 # SPH_ATTR_MULTI
}
GroupFunctions = 
{
  :day      => 0, # SPH_GROUPBY_DAY
  :week     => 1, # SPH_GROUPBY_WEEK
  :month    => 2, # SPH_GROUPBY_MONTH
  :year     => 3, # SPH_GROUPBY_YEAR
  :attr     => 4, # SPH_GROUPBY_ATTR
  :attrpair => 5  # SPH_GROUPBY_ATTRPAIR
}
FilterTypes = 
{
  :values       => 0, # SPH_FILTER_VALUES
  :range        => 1, # SPH_FILTER_RANGE
  :float_range  => 2  # SPH_FILTER_FLOATRANGE
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(server = nil, port = nil) ⇒ Client

Can instantiate with a specific server and port - otherwise it assumes defaults of localhost and 3312 respectively. All other settings can be accessed and changed via the attribute accessors.



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# File 'lib/riddle/client.rb', line 109

def initialize(server=nil, port=nil)
  @server = server || "localhost"
  @port   = port   || 3312
  
  # defaults
  @offset         = 0
  @limit          = 20
  @max_matches    = 1000
  @match_mode     = :all
  @sort_mode      = :relevance
  @sort_by        = ''
  @weights        = []
  @id_range       = 0..0
  @filters        = []
  @group_by       = ''
  @group_function = :day
  @group_clause   = '@group desc'
  @group_distinct = ''
  @cut_off        = 0
  @retry_count    = 0
  @retry_delay    = 0
  @anchor         = {}
  # string keys are index names, integer values are weightings
  @index_weights  = {}
  @rank_mode      = :proximity_bm25
  @max_query_time = 0
  # string keys are field names, integer values are weightings
  @field_weights  = {}
  @timeout        = 0
  
  @queue = []
end

Instance Attribute Details

#anchor ⇒ Object

Returns the value of attribute anchor.



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# File 'lib/riddle/client.rb', line 99

def anchor
  @anchor
end

#cut_off ⇒ Object

Returns the value of attribute cut_off.



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# File 'lib/riddle/client.rb', line 99

def cut_off
  @cut_off
end

#field_weights ⇒ Object

Returns the value of attribute field_weights.



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# File 'lib/riddle/client.rb', line 99

def field_weights
  @field_weights
end

#filters ⇒ Object

Returns the value of attribute filters.



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# File 'lib/riddle/client.rb', line 99

def filters
  @filters
end

#group_by ⇒ Object

Returns the value of attribute group_by.



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# File 'lib/riddle/client.rb', line 99

def group_by
  @group_by
end

#group_clause ⇒ Object

Returns the value of attribute group_clause.



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# File 'lib/riddle/client.rb', line 99

def group_clause
  @group_clause
end

#group_distinct ⇒ Object

Returns the value of attribute group_distinct.



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# File 'lib/riddle/client.rb', line 99

def group_distinct
  @group_distinct
end

#group_function ⇒ Object

Returns the value of attribute group_function.



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# File 'lib/riddle/client.rb', line 99

def group_function
  @group_function
end

#id_range ⇒ Object

Returns the value of attribute id_range.



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# File 'lib/riddle/client.rb', line 99

def id_range
  @id_range
end

#index_weights ⇒ Object

Returns the value of attribute index_weights.



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# File 'lib/riddle/client.rb', line 99

def index_weights
  @index_weights
end

#limit ⇒ Object

Returns the value of attribute limit.



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# File 'lib/riddle/client.rb', line 99

def limit
  @limit
end

#match_mode ⇒ Object

Returns the value of attribute match_mode.



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# File 'lib/riddle/client.rb', line 99

def match_mode
  @match_mode
end

#max_matches ⇒ Object

Returns the value of attribute max_matches.



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# File 'lib/riddle/client.rb', line 99

def max_matches
  @max_matches
end

#max_query_time ⇒ Object

Returns the value of attribute max_query_time.



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# File 'lib/riddle/client.rb', line 99

def max_query_time
  @max_query_time
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/riddle/client.rb', line 99

def offset
  @offset
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/riddle/client.rb', line 99

def port
  @port
end

#queue ⇒ Object (readonly)

Returns the value of attribute queue.



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# File 'lib/riddle/client.rb', line 104

def queue
  @queue
end

#rank_mode ⇒ Object

Returns the value of attribute rank_mode.



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# File 'lib/riddle/client.rb', line 99

def rank_mode
  @rank_mode
end

#retry_count ⇒ Object

Returns the value of attribute retry_count.



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# File 'lib/riddle/client.rb', line 99

def retry_count
  @retry_count
end

#retry_delay ⇒ Object

Returns the value of attribute retry_delay.



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# File 'lib/riddle/client.rb', line 99

def retry_delay
  @retry_delay
end

#server ⇒ Object

Returns the value of attribute server.



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# File 'lib/riddle/client.rb', line 99

def server
  @server
end

#sort_by ⇒ Object

Returns the value of attribute sort_by.



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# File 'lib/riddle/client.rb', line 99

def sort_by
  @sort_by
end

#sort_mode ⇒ Object

Returns the value of attribute sort_mode.



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# File 'lib/riddle/client.rb', line 99

def sort_mode
  @sort_mode
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/riddle/client.rb', line 99

def timeout
  @timeout
end

#weights ⇒ Object

Returns the value of attribute weights.



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# File 'lib/riddle/client.rb', line 99

def weights
  @weights
end

Instance Method Details

#append_query(search, index = '*', comments = '') ⇒ Object

Append a query to the queue. This uses the same parameters as the query method.



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# File 'lib/riddle/client.rb', line 193

def append_query(search, index = '*', comments = '')
  @queue << query_message(search, index, comments)
end

#excerpts(options = {}) ⇒ Object

Build excerpts from search terms (the words) and the text of documents. Excerpts are bodies of text that have the words highlighted. They may also be abbreviated to fit within a word limit.

As part of the options hash, you will need to define:

  • :docs

  • :words

  • :index

Optional settings include:

  • :before_match (defaults to <span class=“match”>)

  • :after_match (defaults to </span>)

  • :chunk_separator (defaults to ‘ &#8230; ’ - which is an HTML ellipsis)

  • :limit (defaults to 256)

  • :around (defaults to 5)

  • :exact_phrase (defaults to false)

  • :single_passage (defaults to false)

The defaults differ from the official PHP client, as I’ve opted for semantic HTML markup.

Example:

client.excerpts(:docs => ["Pat Allan, Pat Cash"], :words => 'Pat', :index => 'pats')
#=> ["<span class=\"match\">Pat</span> Allan, <span class=\"match\">Pat</span> Cash"]

lorem_lipsum = "Lorem ipsum dolor..."

client.excerpts(:docs => ["Pat Allan, #{lorem_lipsum} Pat Cash"], :words => 'Pat', :index => 'pats')
#=> ["<span class=\"match\">Pat</span> Allan, Lorem ipsum dolor sit amet, consectetur adipisicing
       elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua &#8230; . Excepteur 
       sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est 
       laborum. <span class=\"match\">Pat</span> Cash"]

Workflow:

Excerpt creation is completely isolated from searching the index. The nominated index is only used to discover encoding and charset information.

Therefore, the workflow goes:

  1. Do the sphinx query.

  2. Fetch the documents found by sphinx from their repositories.

  3. Pass the documents’ text to excerpts for marking up of matched terms.



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# File 'lib/riddle/client.rb', line 355

def excerpts(options = {})
  options[:index]           ||= '*'
  options[:before_match]    ||= '<span class="match">'
  options[:after_match]     ||= '</span>'
  options[:chunk_separator] ||= ' &#8230; ' # ellipsis
  options[:limit]           ||= 256
  options[:around]          ||= 5
  options[:exact_phrase]    ||= false
  options[:single_passage]  ||= false
  
  response = Response.new request(:excerpt, excerpts_message(options))
  
  options[:docs].collect { response.next }
end

#keywords(query, index, return_hits = false) ⇒ Object

Generates a keyword list for a given query. Each keyword is represented by a hash, with keys :tokenised and :normalised. If return_hits is set to true it will also report on the number of hits and documents for each keyword (see :hits and :docs keys respectively).



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# File 'lib/riddle/client.rb', line 392

def keywords(query, index, return_hits = false)
  response = Response.new request(
    :keywords,
    keywords_message(query, index, return_hits)
  )
  
  (0...response.next_int).collect do
    hash = {}
    hash[:tokenised]  = response.next
    hash[:normalised] = response.next
    
    if return_hits
      hash[:docs] = response.next_int
      hash[:hits] = response.next_int
    end
    
    hash
  end
end

#query(search, index = '*', comments = '') ⇒ Object

Query the Sphinx daemon - defaulting to all indexes, but you can specify a specific one if you wish. The search parameter should be a string following Sphinx’s expectations.

The object returned from this method is a hash with the following keys:

  • :matches

  • :fields

  • :attributes

  • :attribute_names

  • :words

  • :total

  • :total_found

  • :time

  • :status

  • :warning (if appropriate)

  • :error (if appropriate)

The key :matches returns an array of hashes - the actual search results. Each hash has the document id (:doc), the result weighting (:weight), and a hash of the attributes for the document (:attributes).

The :fields and :attribute_names keys return list of fields and attributes for the documents. The key :attributes will return a hash of attribute name and type pairs, and :words returns a hash of hashes representing the words from the search, with the number of documents and hits for each, along the lines of:

results[:words]["Pat"] #=> {:docs => 12, :hits => 15}

:total, :total_found and :time return the number of matches available, the total number of matches (which may be greater than the maximum available, depending on the number of matches and your sphinx configuration), and the time in milliseconds that the query took to run.

:status is the error code for the query - and if there was a related warning, it will be under the :warning key. Fatal errors will be described under :error.



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# File 'lib/riddle/client.rb', line 305

def query(search, index = '*', comments = '')
  @queue << query_message(search, index, comments)
  self.run.first
end

#reset ⇒ Object

Reset attributes and settings to defaults.



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# File 'lib/riddle/client.rb', line 143

def reset
  # defaults
  @offset         = 0
  @limit          = 20
  @max_matches    = 1000
  @match_mode     = :all
  @sort_mode      = :relevance
  @sort_by        = ''
  @weights        = []
  @id_range       = 0..0
  @filters        = []
  @group_by       = ''
  @group_function = :day
  @group_clause   = '@group desc'
  @group_distinct = ''
  @cut_off        = 0
  @retry_count    = 0
  @retry_delay    = 0
  @anchor         = {}
  # string keys are index names, integer values are weightings
  @index_weights  = {}
  @rank_mode      = :proximity_bm25
  @max_query_time = 0
  # string keys are field names, integer values are weightings
  @field_weights  = {}
  @timeout        = 0
end

#run ⇒ Object

Run all the queries currently in the queue. This will return an array of results hashes.



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# File 'lib/riddle/client.rb', line 199

def run
  response = Response.new request(:search, @queue)
  
  results = @queue.collect do
    result = {
      :matches         => [],
      :fields          => [],
      :attributes      => {},
      :attribute_names => [],
      :words           => {}
    }

    result[:status] = response.next_int
    case result[:status]
    when Statuses[:warning]
      result[:warning] = response.next
    when Statuses[:error]
      result[:error] = response.next
      next result
    end
    
    result[:fields] = response.next_array

    attributes = response.next_int
    for i in 0...attributes
      attribute_name = response.next
      type           = response.next_int

      result[:attributes][attribute_name] = type
      result[:attribute_names] << attribute_name
    end

    matches   = response.next_int
    is_64_bit = response.next_int
    for i in 0...matches
      doc = is_64_bit > 0 ? response.next_64bit_int : response.next_int
      weight = response.next_int

      result[:matches] << {:doc => doc, :weight => weight, :index => i, :attributes => {}}
      result[:attribute_names].each do |attr|
        result[:matches].last[:attributes][attr] = attribute_from_type(
          result[:attributes][attr], response
        )
      end
    end

    result[:total] = response.next_int.to_i || 0
    result[:total_found] = response.next_int.to_i || 0
    result[:time] = ('%.3f' % (response.next_int / 1000.0)).to_f || 0.0

    words = response.next_int
    for i in 0...words
      word = response.next
      docs = response.next_int
      hits = response.next_int
      result[:words][word] = {:docs => docs, :hits => hits}
    end

    result
  end
  
  @queue.clear
  results
end

#set_anchor(lat_attr, lat, long_attr, long) ⇒ Object

Set the geo-anchor point - with the names of the attributes that contain the latitude and longitude (in radians), and the reference position. Note that for geocoding to work properly, you must also set match_mode to :extended. To sort results by distance, you will need to set sort_mode to ‘@geodist asc’ for example. Sphinx expects latitude and longitude to be returned from you SQL source in radians.

Example:

client.set_anchor('lat', -0.6591741, 'long', 2.530770)



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# File 'lib/riddle/client.rb', line 182

def set_anchor(lat_attr, lat, long_attr, long)
  @anchor = {
    :latitude_attribute   => lat_attr,
    :latitude             => lat,
    :longitude_attribute  => long_attr,
    :longitude            => long
  }
end

#update(index, attributes, values_by_doc) ⇒ Object

Update attributes - first parameter is the relevant index, second is an array of attributes to be updated, and the third is a hash, where the keys are the document ids, and the values are arrays with the attribute values - in the same order as the second parameter.

Example:

client.update('people', ['birthday'], {1 => [Time.at(1982, 20, 8).to_i]})



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# File 'lib/riddle/client.rb', line 379

def update(index, attributes, values_by_doc)
  response = Response.new request(
    :update,
    update_message(index, attributes, values_by_doc)
  )
  
  response.next_int
end