class MessLevelOne(models.Model):
    user = models.CharField(max_length=30)
    datetime = models.DateTimeField()
    message_text = models.CharField(max_length=400)        
    def __unicode__(self):
            return '%s %s %s' % (self.user, self.datetime, self.message_text)
            
class MessLevelTwo(models.Model):
    level_two_user = models.CharField(max_length=30)
    level_two_datetime = models.DateTimeField()
    level_two_message_text = models.CharField(max_length=400)
    level_one = models.ForeignKey('MessLevelOne',related_name='level_one')
    def __unicode__(self):
            return '%s %s %s %s' % (self.level_two_user, self.level_two_datetime, self.level_two_message_text, self.level_one)

def gbook(request):      
    mess_level_one = MessLevelOne.objects.all()
    return render_to_response('standart/guestbook.html', locals(),context_instance=RequestContext(request))

{% for message in mess_level_one %}
 
<table bgcolor=orange>
    <tr>
      <td bgcolor=white> {{ message.id }}</td>
      <td> {{ message.user }}</td>
      <td>{{ message.datetime }}</td>
      <td>{{ message.message_text }}</td>
      <td>
    [b]  {% for mess in message.level_one.select_related %} [/b]
        <table bgcolor=red>
          <tr>
          <td bgcolor=white> {{ forloop.parent.counter }}</td>
          <td bgcolor=red> {{ mess.to_level_one_theme }} </td>
          <td bgcolor=red>{{ mess.level_two_message_text }}</td>
          </tr>
        </table>
      {% endfor %} 
      </td>
      <td><a href=",,,"}">ответить</a></td>
    </tr>
</table>
     
{% endfor %}

[mysqld]
default-storage-engine=InnoDB