guestbook/guestbook5_datastore.py

   1 import cgi
   2
   3 from google.appengine.api import users
   4 from google.appengine.ext import webapp
   5 from google.appengine.ext.webapp.util import run_wsgi_app
   6 from google.appengine.ext import db
   7
   8 class Greeting(db.Model):
   9   author = db.UserProperty()
  10   content = db.StringProperty(multiline=True)
  11   date = db.DateTimeProperty(auto_now_add=True)
  12
  13 class MainPage(webapp.RequestHandler):
  14   def get(self):
  15     self.response.out.write('<html><body>')
  16
  17     greetings = db.GqlQuery("SELECT * FROM Greeting ORDER BY date DESC LIMIT 10")
  18
  19     for greeting in greetings:
  20       if greeting.author:
  21         self.response.out.write('<b>%s</b> wrote:' % greeting.author.nickname())
  22       else:
  23         self.response.out.write('An anonymous person wrote:')
  24       self.response.out.write('<blockquote>%s</blockquote>' %
  25                               cgi.escape(greeting.content))
  26
  27     # Write the submission form and the footer of the page
  28     self.response.out.write("""
  29           <form action="/sign" method="post">
  30             <div><textarea name="content" rows="3" cols="60"></textarea></div>
  31             <div><input type="submit" value="Sign Guestbook"></div>
  32           </form>
  33         </body>
  34       </html>""")
  35
  36 class Guestbook(webapp.RequestHandler):
  37   def post(self):
  38     greeting = Greeting()
  39
  40     if users.get_current_user():
  41       greeting.author = users.get_current_user()
  42
  43     greeting.content = self.request.get('content')
  44     greeting.put()
  45     self.redirect('/')
  46
  47 application = webapp.WSGIApplication(
  48                                      [('/', MainPage),
  49                                       ('/sign', Guestbook)],
  50                                      debug=True)
  51
  52 def main():
  53   run_wsgi_app(application)
  54
  55 if __name__ == "__main__":
  56   main()