我对 python 很陌生，在简要介绍了 python + Google 应用引擎之后，我开始着手一个试点项目。我已将 2 个实体 UserDetails 和 PhoneBook 与数据批量加载到应用程序引擎上。现在在我的 UI 中，我尝试首先输入用户名，然后查询它以从 UserDetails 中获取用户 ID，然后使用检索到的用户 ID 查询电话簿以获取他的电话簿条目。这是我的 UI 代码，
#!/usr/bin/env python
import wsgiref.handlers
from google.appengine.ext import db
from google.appengine.ext import webapp
from google.appengine.ext.webapp import template
from models import UserDetails,PhoneBook
#import models
class showPhoneBook(db.Model):
""" class to store the user_name to db """
user_name = db.StringProperty(required=True)
class MyHandler(webapp.RequestHandler):
def get(self):
""" Query type 1 """
#p = db.GqlQuery('SELECT * FROM UserDetails WHERE user_name = :1', user_name)
""" Query type 2 """
#p = UserDetails.gql('WHERE user_name = :1', user_name)
""" Query type 3 """
p = UserDetails.all().filter('user_name = ', user_name)
result1 = p.get()
for itr1 in result1:
userId = itr.user_id
""" Query type 1 """
#q = db.GqlQuery('SELECT * FROM PhoneBook WHERE user_id = :1', userId)
""" Query type 2 """
#q = PhoneBook.gql('WHERE user_id = :1', userId)
""" Query type 3 """
q = PhoneBook.all().filter('user_id = ', userId)
values = {
'phoneBookValues': q
}
self.response.out.write(
template.render('phonebook.html', values))
def post(self):
phoneBookuserID = showPhoneBook(
user_name = self.request.get('username'))
phonebookuserID.put()
self.redirect('/')
def main():
app = webapp.WSGIApplication([
(r'.*',MyHandler)], debug=True)
wsgiref.handlers.CGIHandler().run(app)
if __name__ == "__main__":
main()
问题是我在日志中收到此错误，即 GAE 无法从模型中导入 UserDetails/phone 类，
<type 'exceptions.ImportError'>: cannot import name UserDetails
Traceback (most recent call last):
File "/base/data/home/apps/bulkloader160by2/1-4.337299749289926105/main.py", line 7, in <module>
from models import UserDetails,PhoneBook
当我删除from models import UserDetails,PhoneBook并使用时import models，我得到，
global name 'UserDetails' is not defined
Traceback (most recent call last):
File "/base/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 507, in __call__
handler.get(*groups)
File "/base/data/home/apps/bulkloader160by2/1-4.337300095868541686/main.py", line 19, in get
p = UserDetails.all().filter('user_name = ', user_name)
NameError: global name 'UserDetails' is not defined
这是我的 models.py 文件，我在其中定义了 UserDetails 和 PhoneBook 类。我已将此文件存储在根目录中。
#!/usr/bin/env python
from google.appengine.ext import db
#Table structure of User Details table
class UserDetails(db.Model):
user_id = db.IntegerProperty(required = True)
user_name = db.StringProperty(required = True)
mobile_number = db.PhoneNumberProperty(required = True)
#Table structure of Phone Book table
class PhoneBook(db.Model):
contact_id = db.IntegerProperty(required=True)
user_id = db.IntegerProperty(required=True)
contact_name = db.StringProperty(required=True)
contact_number = db.PhoneNumberProperty(required=True)
作为 python 新手，我无法弄清楚为什么无法从我的 models.py 文件中导入我的类，以及如何从 to 设置/获取post(self)user_name get(self)。
如果我很天真，请原谅我，但如果您能帮助我正确设置我的代码，我们将非常感谢您的帮助。
谢谢。