Class: ScraperWiki::API::Matchers::HaveUniqueValues

Inherits:
FieldMatcher show all
Defined in:
lib/scraperwiki-api/matchers.rb

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from ScraperWiki::API::Matchers::CustomMatcher

Instance Method Details

#failure_predicate ⇒ Object 



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# File 'lib/scraperwiki-api/matchers.rb', line 679

def failure_predicate
  "aren't unique"
end

#mismatches ⇒ Object 



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# File 'lib/scraperwiki-api/matchers.rb', line 644

def mismatches
  counts = Hash.new 0
  if @subfield
    items.each do |item|
      unless blank? item[@field]
        v = Yajl::Parser.parse item[@field]
        if Hash === v
          unless blank? v[@subfield]
            counts[v[@subfield]] += 1
          end
        elsif Array === v
          v.each do |w|
            if Hash === w
              unless blank? w[@subfield]
                counts[w[@subfield]] += 1
              end
            else
              raise NotImplementerError, 'Can only handle subfields that are hashes or arrays of hashes'
            end
          end
        else
          raise NotImplementerError, 'Can only handle subfields that are hashes or arrays of hashes'
        end
      end
    end
  else
    items.each do |item|
      unless blank? item[@field]
        counts[item[@field]] += 1
      end
    end
  end
  counts.select{|_,count| count > 1}.keys
end

#negative_failure_predicate ⇒ Object 



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# File 'lib/scraperwiki-api/matchers.rb', line 683

def negative_failure_predicate
  'are unique'
end