Serializes JSON

serializes_json.rb

# serialize :field, Hash 
# got you down?
# serializes_json :field 
# to the rescue!

class ActiveRecord::Base
  def self.serializes_json *args
    args.each do |field_name| 
      eval <<-RUBY
        def #{field_name}=(other)
          self['#{field_name}'] = other.to_json
        end
        
        def #{field_name}
          JSON.parse(self['#{field_name}'] || '{}')
        end
      RUBY
    end 
  end 
end