Question

db.polymodel.PolyModel类型的实体的批量上传失败，并显示以下错误（我已设法上传其他实体并且所有导入都应该存在）：

[INFO    ] Logging to bulkloader-log-20130901.191015
[INFO    ] Throttling transfers:
[INFO    ] Bandwidth: 250000 bytes/second
[INFO    ] HTTP connections: 8/second
[INFO    ] Entities inserted/fetched/modified: 20/second
[INFO    ] Batch Size: 10
Traceback (most recent call last):
  File "c:/program files (x86)/google/google_appengine/appcfg.py", line 171, in
<module>
    run_file(__file__, globals())
  File "c:/program files (x86)/google/google_appengine/appcfg.py", line 167, in
run_file
    execfile(script_path, globals_)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 4252, in <module>
    main(sys.argv)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 4243, in main
    result = AppCfgApp(argv).Run()
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 2402, in Run
    self.action(self)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 3979, in __call__
    return method()
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 3791, in PerformUpload
    run_fn(args)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\ap
pcfg.py", line 3682, in RunBulkloader
    sys.exit(bulkloader.Run(arg_dict))
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\bu
lkloader.py", line 4395, in Run
    return _PerformBulkload(arg_dict)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\bu
lkloader.py", line 4206, in _PerformBulkload
    LoadConfig(config_file)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\bu
lkloader.py", line 3873, in LoadConfig
    Loader.RegisterLoader(cls())
  File "SubscribLoader.py", line 23, in __init__
    ('description', lambda x: x.decode('utf-8')),
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\bu
lkloader.py", line 2674, in __init__
    GetImplementationClass(kind)
  File "c:\program files (x86)\google\google_appengine\google\appengine\tools\bu
lkloader.py", line 968, in GetImplementationClass
    implementation_class = db.class_for_kind(kind_or_class_key)
  File "c:\program files (x86)\google\google_appengine\google\appengine\ext\db\_
_init__.py", line 296, in class_for_kind
    raise KindError('No implementation for kind \'%s\'' % kind)
google.appengine.ext.db.KindError: No implementation for kind 'DbSubscrib

” 这是命令行：

appcfg.py upload_data --config_file=SubscribLoader.py --filename=Subscrib.csv --
kind=(DbProduct,DbSubscrib) --url=https://.../_ah/remote_api -A appname

这是Loader Class

import datetime
from google.appengine.tools import bulkloader
from Db.shop.DbSubscrib import DbSubscrib


class SubscribLoader (bulkloader.Loader):
    def __init__(self):
        bulkloader.Loader.__init__(self, ('DbProduct','DbSubscrib'),
                                   [
                                    ('name', lambda x: x.decode('utf-8')),
                                    ('createDate',
                                     lambda x: datetime.datetime.strptime(x, '%m/%d/%Y').date()),
                                    ('level', lambda x: x.decode('utf-8')),
                                    ('duration', lambda x: x.decode('utf-8')),
                                    ('service', lambda x: x.decode('utf-8')),
                                    ('description', lambda x: x.decode('utf-8')),
                                   ])

loaders = [SubscribLoader]

DbSubcrib派生自DbProduct，它来自polymodel.PolyModel

是的，我试图添加另一个额外的属性'class'，它被硬编码到DbSubscrib'（也尝试添加2个属性'DbProduct'和'DbSubscrib'，没有任何运气。

非常感谢任何帮助。我在goole的网站上找不到一个关于PolyModel和bulkupload的任何细微差别的文档。

Answer 1

好的，您的问题是无法上传DbSubScrib，您需要我们DbProduct。如果您查看存储在数据存储区中的任何DbSubScrib，它就是DbProduct类，并且子类在数据存储区中将具有class属性，用于存储继承类名称

例如

 class  value: ["DbProduct", "DbSubScrib"]

将您的装载程序类编辑为DbProduct，它将起作用。

Answer 2

经过一点修修补补后，在google appengine的bulkuploader中发现了这个问题：似乎有人试图让PolyModel的bulkupload工作，但不确定为什么这部分没有修复（或测试）。也许我错过了一些东西 - 无论如何它对我来说都适用于这些变化......修复程序位于google.appengine.tools.bulkloader.py的以下行中：

class BulkTransporterApp(object):
  """Class to wrap bulk transport application functionality."""

  def __init__(self,

....
....


line 3399 - old -     self.kind = arg_dict['kind']

line 3399 - new -    self.kind = ParseKind (arg_dict['kind'])

在此次更改后，我可以上传。

我修复了上面的Bulkuploader模块和命令行，了解如何上传PolyModel。

批量上传不适用于appengine数据存储区中的Polymodel

2 个答案: