title: Google app engine tutorial problem - new datastore model
body: <p>So i've just finished the google app engine greetings tutorial. All well so far. I then decided to try and add a new datastore model and then set it in the existing handler. I added a 2nd content field called "content2" and then tried to set it in the handler Guestbook(), but it keeps borking out. I'm sure it will be the silliest error, but I'm stumped atm. Any ideas?</p>
  
  <p><strong>main.py</strong></p>
  
  <pre><code>import cgi
  
  from google.appengine.api import users
  from google.appengine.ext import webapp
  from google.appengine.ext.webapp.util import run_wsgi_app
  from google.appengine.ext import db
  import os
  from google.appengine.ext.webapp import template
  
  class Greeting(db.Model):
    author = db.UserProperty()
    content = db.StringProperty(multiline=True)
    date = db.DateTimeProperty(auto_now_add=True)
    content2 = db.StringProperty(multiline=True)
  
  
  class MainPage(webapp.RequestHandler):
    def get(self):
      greetings_query = Greeting.all().order('-date')
      greetings = greetings_query.fetch(1000)
  
      if users.get_current_user():
        url = users.create_logout_url(self.request.uri)
        url_linktext = 'Logout'
      else:
        url = users.create_login_url(self.request.uri)
        url_linktext = 'Login'
  
      template_values = {
        'greetings': greetings,
        'url': url,
        'url_linktext': url_linktext,
        }
  
  
      path = os.path.join(os.path.dirname(__file__), 'index.html')
      self.response.out.write(template.render(path, template_values))
  
  class Guestbook(webapp.RequestHandler):
    def post(self):
      greeting = Greeting()
  
      if users.get_current_user():
        greeting.author = users.get_current_user()
  
      greeting.content = self.request.get('content')
   greeting.content2 = self.request.get('content')
      greeting.put()
      self.redirect('/')
  
  class HelloWorld(webapp.RequestHandler):
    def get(self):
      self.response.out.write('Hello, webapp World!')
  
  
  
  application = webapp.WSGIApplication(
                                       [('/', MainPage),
                                        ('/sign', Guestbook)],
                                       debug=True)
  
  def main():
    run_wsgi_app(application)
  
  if __name__ == "__main__":
    main()
  </code></pre>
  
  <p><strong>index.html</strong></p>
  
  <pre><code>&lt;html&gt;
    &lt;body&gt;
      {% for greeting in greetings %}
        {% if greeting.author %}
          &lt;b&gt;{{ greeting.author.nickname }}&lt;/b&gt; wrote: Dogs name is: {{ pet.name }}
        {% else %}
         An anonymous person wrote:
        {% endif %}
        &lt;blockquote&gt;{{ greeting.content|escape }}&lt;/blockquote&gt;
      {% endfor %}
  
      &lt;form action="/sign" method="post"&gt;
        &lt;div&gt;&lt;textarea name="content" rows="3" cols="60"&gt;&lt;/textarea&gt;&lt;/div&gt;
        &lt;div&gt;&lt;input type="submit" value="Sign Guestbook"&gt;&lt;/div&gt;
      &lt;/form&gt;
  
      &lt;a href="{{ url }}"&gt;{{ url_linktext }}&lt;/a&gt;
  
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>