# File lib/better_nested_set.rb, line 139
139:         def before_create
140:             maxright = self.class.count_by_sql("SELECT max(\"#{acts_as_nested_set_options[:right_column]}\") FROM "+self.class.table_name)
141:             # adds the new node to the right of all existing nodes
142:             self[acts_as_nested_set_options[:left_column]] = maxright+1
143:             self[acts_as_nested_set_options[:right_column]] = maxright+2
144:         end