add_conditions!

# File activerecord/lib/active_record/base.rb, line 940
        def add_conditions!(sql, conditions)          
          segments = [scope(:find, :conditions)]
          segments << sanitize_sql(conditions) unless conditions.nil?
          segments << type_condition unless descends_from_active_record?        
          segments.compact!
          sql << "WHERE (#{segments.join(") AND (")}) " unless segments.empty?
        end