Google app engine 无法使用应用程序引擎数据存储
我已经使用了app engine的入门指南。但是我无法使用数据存储 运行指南中提供的简单代码时，出现“无法访问应用程序数据”错误 我的代码：Google app engine 无法使用应用程序引擎数据存储,google-app-engine,google-cloud-datastore,Google App Engine,Google Cloud Datastore,我已经使用了app engine的入门指南。但是我无法使用数据存储 运行指南中提供的简单代码时，出现“无法访问应用程序数据”错误 我的代码： import cgi import datetime import urllib import webapp2 from google.appengine.ext import db from google.appengine.api import users MAIN_PAGE_FOOTER_TEMPLATE = """\ <form act
import cgi
import datetime
import urllib
import webapp2
from google.appengine.ext import db
from google.appengine.api import users
MAIN_PAGE_FOOTER_TEMPLATE = """\
<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>
"""
class Greeting(db.Model):
"""Models an individual Guestbook entry with author, content, and date."""
author = 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.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.write(
'<b>%s</b> wrote:' % greeting.author)
else:
self.response.write('An anonymous person wrote:')
self.response.write('<blockquote>%s</blockquote>' %
cgi.escape(greeting.content))
# Write the submission form and the footer of the page
sign_query_params = urllib.urlencode({'guestbook_name': guestbook_name})
self.response.write(MAIN_PAGE_FOOTER_TEMPLATE %
(sign_query_params, 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()
query_params = {'guestbook_name': guestbook_name}
self.redirect('/?' + urllib.urlencode(query_params))
app = webapp2.WSGIApplication([('/', MainPage),
('/sign', Guestbook)],
debug=True)
我复制并粘贴了您的代码，它似乎正在工作（我必须更改格式） 你的app.yaml中有什么？（我把我的文件命名为aaa.py）这就是我使用的
application: somename
version: 1
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /.*
script: aaa.app
对于dev服务器，答案在stacktrace的最后一行
app“dev~helloworld”无法访问app“dev~hellolxmn”的数据我猜您的错误在产品中会有一点不同，所以在生产中显示错误的跟踪。您应该能够通过清除数据存储来修复此问题。
application: somename
version: 1
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /.*
script: aaa.app