Method: Tag.cloud

Defined in:
app/models/tag.rb

.cloud(options = {}) ⇒ Object

Returns an array of tags with a size attribute This takes the same arguments as find, plus the additional ‘:sizes` option, which contols the number of sizes the tag cloud will have. The default number of sizes is 5.



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# File 'app/models/tag.rb', line 26

def self.cloud(options={})
  sizes = (options.delete(:sizes) || 5) - 1
  sizes = 1 if sizes < 1
  tags = counts(options)
  return [] if tags.blank?
  
  min = nil
  max = nil
  tags.each do |t|
    t.count = t.count.to_i
    min = t.count if (min.nil? || t.count < min)
    max = t.count if (max.nil? || t.count > min)
  end

  divisor = ((max - min) / sizes) + 1
  tags.each do |t|
    t.size = ("%1.0f" % (t.count * 1.0 / divisor)).to_i
  end
  
  tags
end