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# File 'lib/backframe/activerecord/acts_as_distinct.rb', line 14
def acts_as_distinct(*args)
field = args[0]
arguments = args[1]
class_eval <<-EOV
after_initialize :set_default_#{field}, :if => Proc.new { |m| m.new_record? && m.#{arguments[:parent]}.present? }
after_save :toggle_#{field}_distinction, :if => Proc.new { |m| m.#{arguments[:parent]}.present? && m.#{field} && (m.new_record? || m.#{field}_changed?) }
scope :#{field.to_s.gsub('is_', '')}, -> { where(:#{field} => true) }
def #{field.to_s.gsub('is_', '')}?
return self.#{field}
end
private
def set_default_#{field}
self.#{field} = self.#{arguments[:parent]}.#{arguments[:association]}.empty?
end
def toggle_#{field}_distinction
self.#{arguments[:parent]}.#{arguments[:association]}.where('id != ?', self.id).update_all(:#{field} => false)
end
EOV
end
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