GAE SDK 1.6.4 dev_appserver数据存储刷新 [英] GAE SDK 1.6.4 dev_appserver datastore flush

问题描述

在1.6.3和1.6.4之间有一些变化，关于dev_appserver数据存储刷新到应用程序退出时的磁盘？

我使用的是django-nonrel，在1.6.3和之前，我曾经可以加载一个python shell：
python manage.py shell（manage.py由django-nonrel提供）

然后我可以导入我的模型并接受数据存储，修改实体和退出。

在1.6.4上，我可以这样做，但是当我退出时，更改不会保存到数据存储中。当我将django-nonrel作为WSGI应用运行时，它可以正常保存，并在退出时看到一条消息（应用所有待处理事务并保存数据存储）。

解决方案

感谢dragonx提供的解决方案和信息。
我从eclipse运行我的devserver，我很惊讶地发现我的数据在升级到1.6.4 $ b $后没有被保存。我在每次web请求后都向数据库添加了一个flush，为此我实现了一个所有请求的基类和重载调度：

  developmentServer = False 
 
如果os.environ.get （'SERVER_SOFTWARE'，''）。startswith（'Development'）：
 developmentServer = True 
 $ b $ class BaseRequestHandler（webapp2.RequestHandler）：
 def dispatch（self）：
 retValue = super（BaseRequestHandler，self）.dispatch（）
如果developmentServer：
 from google.appengine.tools import dev_appserver 
 dev_appserver.TearDownStubs（）
 
返回retValue 
  

通知发行说明中类似行为的变化，会为我节省两个查找我升级时出错的日子。

Hoping to get a comment from the GAE python team on this one.

Has something changed between 1.6.3, 1.6.4 with regards to the way the dev_appserver datastore is flushed to disk on app exit?

I'm using django-nonrel, and on 1.6.3, and before, I used to be able to load up a python shell: python manage.py shell (manage.py is provided by django-nonrel)

I could then import my models and acceess the datastore, modify entities, and quit.

On 1.6.4, I'm able to do that, but when I quit, changes are not saved to the datastore. When I run django-nonrel as a WSGI app, it saves properly, and I see a message on exit ("Applying all pending transactions and saving the datastore").

解决方案

Thanks to dragonx for his solution and info. I run my devserver from eclipse, and I was amazed to see my data not beeing saved after upgrading to 1.6.4 I added a flush to the database after every web request, to do that I implemented a base class for all requests and override dispatch:

developmentServer = False

if os.environ.get('SERVER_SOFTWARE','').startswith('Development'):
    developmentServer = True

class BaseRequestHandler(webapp2.RequestHandler):
    def dispatch(self):
        retValue = super(BaseRequestHandler, self).dispatch()
        if developmentServer:
                from google.appengine.tools import dev_appserver 
                dev_appserver.TearDownStubs()

        return retValue

informing about a change in behavior like that in the release notes, would have saved me two days of searching what went wrong in my upgrade.

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