GAE Error II

by Yan Sheng

上传时的400错误

Error 400: --- begin server output ---
Creating a composite index failed:
An index may not be comprised of a single repeated property.
Your query probably doesn't need this index.
Try without it!

解决办法

直接把index.yaml中自动产生的models信息删除，才能上传正确。

另外发现，上传时，有些时候明明做修改了的文件不能上传。只能再次修改，所以奇怪他是按照什么来判断文件是否要上传。

以下这个错误经常在新建entry提交后出现。新的entry是已经到后台数据库中，只是转到页面后出现如下错误：

Error at /blog/post/401/
Request Method:     GET
Request URL:        http://lizziesky.appspot.com/blog/post/401/
Exception Type:     Error
Exception Value:
Exception Location:         /base/python_lib/versions/1/google/appengine/api/datastore.py in _ToDatastoreError, line 1603
Traceback (innermost last)
Switch to copy-and-paste view

* /base/python_lib/versions/1/django/core/handlers/base.py in get_response
    70. # Apply view middleware
    71. for middleware_method in self._view_middleware:
    72. response = middleware_method(request, callback, callback_args, callback_kwargs)
    73. if response:
    74. return response
    75.
    76. try:
    77. response = callback(request, *callback_args, **callback_kwargs) ...
    78. except Exception, e:
    79. # If the view raised an exception, run it through exception
    80. # middleware, and if the exception middleware returns a
    81. # response, use that. Otherwise, reraise the exception.
    82. for middleware_method in self._exception_middleware:
    83. response = middleware_method(request, e)

这个估计是服务器处理后台数据时的不稳定。

PythonGAE