Python-сообщество

 
{% if p.image %} 
  <img src="{{ p.image.url }}" width="70" height="70" alt="product        preview" /> 
{% else %} 
  <img src="/static/images/ico_zoom.gif" width="70" height="70" alt="product preview" /> 
{% endif %}

def get_image_url(self)
    if os.path.isfile(os.path.join(MEDIA_ROOT, self.image.path)):
        return self.image.url
    return "/static/images/ico_zoom.gif"

<img src="{{ p.get_image_url}}"  />

    def IsFileExist(self):
        try:
            res = self.image.size
        except:
            res = False
        return res