Module: MongoMapperExt::Filter::ClassMethods

Defined in:
lib/mongomapper_ext/filter.rb

Instance Method Summary collapse

Instance Method Details

#filter(query, opts = {}) ⇒ Object 



34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
 
# File 'lib/mongomapper_ext/filter.rb', line 34

def filter(query, opts = {})
  stemmer = nil
  original_words = Set.new(query.downcase.split)
  language = opts.delete(:language) || 'en'

  stemmed = []
  if defined?(Lingua)
    stemmer = MongoMapperExt::Filter.build_stemmer(language)
    original_words.each do |word|
      stemmed_word = stemmer.stem(word)
      stemmed << stemmed_word unless original_words.include?(stemmed_word)
    end
  end

  regex = (original_words+stemmed).map do |k|
    /^#{Regexp.escape(k)}/
  end

  min_score = opts.delete(:min_score) || 0.0
  limit = opts.delete(:per_page) || 25
  page = opts.delete(:page) || 1
  select = opts.delete(:select) || self.keys.keys

  query = Plucky::Query.new(self.collection, opts)

  results = self.database.eval("function(collection, q, config) { return filter(collection, q, config); }", self.collection_name, query.criteria.source.merge({"_keywords" => {:$in => regex}}), {:words => original_words.to_a, :stemmed => stemmed.to_a, :limit => limit, :min_score => min_score, :select => select })

  pagination = Paginator.new(results["total_entries"], page, limit)

  pagination.subject = results['results'].map do |result|
    item = self.new(result['doc'])
    item.search_score = result['score']

    item
  end

  pagination
end

#filterable_keys(*keys) ⇒ Object 



23
24
25
26
27
28
 
# File 'lib/mongomapper_ext/filter.rb', line 23

def filterable_keys(*keys)
  @filterable_keys ||= Set.new
  @filterable_keys += keys

  @filterable_keys
end

#language(lang = 'en') ⇒ Object 



30
31
32
 
# File 'lib/mongomapper_ext/filter.rb', line 30

def language(lang = 'en')
  @language ||= lang
end