我也是gae和python的新手,我正在尝试使用数据存储区构建简单的应用程序,其中脚本如下所示
from google.appengine.ext import db
from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
class Pincodes(db.Model):
city = db.StringProperty()
code = db.StringProperty()
class MainHandler(webapp.RequestHandler):
def get(self):
q = Pincodes.all()
q = q.filter("city =", "some_city")
p = q.get()
r = 'city: %s code: %s' % (pincode.city, pincode.code)
self.response.out.write(r)
我的脚本还包含通常的def main()和if__name,我从code.google文档中显示的简单hello world应用程序开始逐步开发它并且工作正常,我已经将包含10条记录的示例密码数据上传到本地数据存储区它也很好,但我无法在网页上查询和显示它我试过self.response.out.write,输出是“city:code:”而不是“city:mumbai code:400001”我的脚本错误
答案 0 :(得分:1)
使用
entity = q.get() # use get if you want one entity only
r = 'city: %s code: %s' %(entity.city, entity.code)
self.response.out.write(r)
而不是打印
编辑:
def get(self):
q = Pincodes.all()
q = q.filter("city =", "some_city")
entity = q.get() # use get if you want one entity only
r = 'city: %s code: %s' %(entity.city, entity.code)
self.response.out.write(r)
EDIT2:
def get(self):
q = Pincodes.all()
q = q.filter("city =", "some_city")
entity = q.get() # use get if you want one entity only
if not entity:
self.response.out.write('sorry no entities found')
else:
r = 'city: %s code: %s' %(entity.city, entity.code)
self.response.out.write(r)