title: Django concatenating the result of __unicode__ and string literal
body: <p>I have the following model:</p>
  
  <pre><code>class MyModel(models.Model):
      # ...
      class Meta:
          managed = False
          db_table = 'legal_entities'
      def __unicode__(self):
          return self.name_short
  </code></pre>
  
  <p>The view</p>
  
  <pre><code>def my_view(response):
     my_model = MyModel.objects.get(id = ...)
     response = u'АБВГД + my_model #TypeError: coercing to Unicode: need         
                                   #string or buffer, LegalEntityOwn found
  </code></pre>
  
  <p>Just broke my head trying various options. Any ideas how to fix it ?</p>