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Recording results successfully
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Catherine Devlin committed Dec 9, 2012
1 parent e3355e0 commit 951ccf0
Showing 1 changed file with 30 additions and 80 deletions.
110 changes: 30 additions & 80 deletions app.py
Expand Up @@ -4,86 +4,36 @@
import webapp2

from google.appengine.ext import db
from google.appengine.api import users


class Greeting(db.Model):
"""Models an individual Guestbook entry with an author, content, and date."""
author = db.StringProperty()
content = db.StringProperty(multiline=True)
date = db.DateTimeProperty(auto_now_add=True)

class Workshop(db.Model):
name = db.StringProperty()

class Student(db.Model):
name = db.StringProperty()

class
student = db.StringProperty()
content = db.StringProperty(multiline=True)
date = db.DateTimeProperty(auto_now_add=True)

def guestbook_key(guestbook_name=None):
"""Constructs a Datastore key for a Guestbook entity with guestbook_name."""
return db.Key.from_path('Guestbook', guestbook_name or 'default_guestbook')


class MainPage(webapp2.RequestHandler):
def get(self):
self.response.out.write('<html><body>')
guestbook_name=self.request.get('guestbook_name')

# Ancestor Queries, as shown here, are strongly consistent with the High
# Replication Datastore. Queries that span entity groups are eventually
# consistent. If we omitted the ancestor from this query there would be a
# slight chance that greeting that had just been written would not show up
# in a query.
greetings = db.GqlQuery("SELECT * "
"FROM Greeting "
"WHERE ANCESTOR IS :1 "
"ORDER BY date DESC LIMIT 10",
guestbook_key(guestbook_name))

for greeting in greetings:
if greeting.author:
self.response.out.write(
'<b>%s</b> wrote:' % greeting.author)
else:
self.response.out.write('An anonymous person wrote:')
self.response.out.write('<blockquote>%s</blockquote>' %
cgi.escape(greeting.content))

self.response.out.write("""
<form action="/sign?%s" method="post">
<div><textarea name="content" rows="3" cols="60"></textarea></div>
<div><input type="submit" value="Sign Guestbook"></div>
</form>
<hr>
<form>Guestbook name: <input value="%s" name="guestbook_name">
<input type="submit" value="switch"></form>
</body>
</html>""" % (urllib.urlencode({'guestbook_name': guestbook_name}),
cgi.escape(guestbook_name)))


class Guestbook(webapp2.RequestHandler):
def post(self):
# We set the same parent key on the 'Greeting' to ensure each greeting is in
# the same entity group. Queries across the single entity group will be
# consistent. However, the write rate to a single entity group should
# be limited to ~1/second.
guestbook_name = self.request.get('guestbook_name')
greeting = Greeting(parent=guestbook_key(guestbook_name))

if users.get_current_user():
greeting.author = users.get_current_user().nickname()

greeting.content = self.request.get('content')
greeting.put()
self.redirect('/?' + urllib.urlencode({'guestbook_name': guestbook_name}))


app = webapp2.WSGIApplication([('/', MainPage),
('/sign', Guestbook)],
class Challenge(db.Model):
student = db.StringProperty()
name = db.StringProperty()
failure = db.BooleanProperty()
source_code = db.StringProperty(multiline=True)
date = db.DateTimeProperty(auto_now_add=True)


class Report(webapp2.RequestHandler):
def get(self):
self.response.out.write('<ul>')
challenges = db.GqlQuery("SELECT * FROM Challenge")
for challenge in challenges:
self.response.out.write('<li>%s</li>' % challenge.failure)
self.response.out.write('</ul>')

class Record(webapp2.RequestHandler):
def post(self):
workshop = db.Key.from_path('Workshop', self.request.get('workshop_name'))
challenge = Challenge(parent=workshop)
challenge.name = self.request.get('name')
challenge.failure = (self.request.get('failure') == 'True')
challenge.source_code = self.request.get('source')
challenge.student = self.request.get('student_name')
challenge.put()


app = webapp2.WSGIApplication([('/', Report),
('/record', Record),
],
debug=True)

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