# File lib/json/add/rails.rb, line 19
19:   def to_json(*a)
20:     result = {
21:       'json_class' => self.class.name
22:     }
23:     instance_variables.inject(result) do |r, name|
24:       r[name[1..-1]] = instance_variable_get name
25:       r
26:     end
27:     result.to_json(*a)
28:   end