我正在尝试在 appengine 中创建一个应用程序来搜索键列表，然后使用此列表从数据存储中删除这些记录，此服务必须是通用服务，因此我无法使用仅按名称搜索的模型当然，可以通过应用程序引擎功能来做到这一点吗？
下面是我的代码，但它要求我有一个模型。
导入httplib
导入日志记录
从日期时间导入日期时间，时间增量
import webapp2
from google.appengine.api import urlfetch
from google.appengine.ext import ndb
DEFAULT_PAGE_SIZE = 100000
DATE_PATTERN = "%Y-%m-%dT%H:%M:%S"
def get_date(amount):
date = datetime.today() - timedelta(days=30 * amount)
date = date.replace(hour=0, minute=0, second=0)
return date
class Purge(webapp2.RequestHandler):
def get(self):
kind = self.request.get('kind')
datefield = self.request.get('datefield')
amount = self.request.get('amount', default_value=3)
date = get_date(amount)
logging.info('Executando purge para Entity {}, mantendo periodo de {} meses.'.format(kind, amount))
# cria a query
query = ndb.Query(kind=kind, namespace='development')
logging.info('Setando o filtro [{} <= {}]'.format(datefield, date.strftime(DATE_PATTERN)))
# cria um filtro
query.filter(ndb.DateTimeProperty(datefield) <= date)
query.fetch_page(DEFAULT_PAGE_SIZE)
while True:
# executa a consulta
keys = query.fetch(keys_only=True)
logging.info('Encontrados {} {} a serem exluidos'.format(len(keys), kind))
# exclui usando as keys
ndb.delete_multi(keys)
if len(keys) < DEFAULT_PAGE_SIZE:
logging.info('Nao existem mais registros a serem excluidos')
break
app = webapp2.WSGIApplication(
[
('/cloud-datastore-purge', Purge),
], debug=True)
Trace
Traceback (most recent call last):
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1535, in __call__
rv = self.handle_exception(request, response, e)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1529, in __call__
rv = self.router.dispatch(request, response)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1278, in default_dispatcher
return route.handler_adapter(request, response)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 1102, in __call__
return handler.dispatch()
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 572, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/third_party/webapp2-2.5.2/webapp2.py", line 570, in dispatch
return method(*args, **kwargs)
File "/base/data/home/apps/p~telefonica-dev-155211/cloud-datastore-purge-python:20180629t150020.410785498982375644/purge.py", line 38, in get
query.fetch_page(_DEFAULT_PAGE_SIZE)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/utils.py", line 160, in positional_wrapper
return wrapped(*args, **kwds)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/query.py", line 1362, in fetch_page
return self.fetch_page_async(page_size, **q_options).get_result()
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 383, in get_result
self.check_success()
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 427, in _help_tasklet_along
value = gen.throw(exc.__class__, exc, tb)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/query.py", line 1380, in _fetch_page_async
while (yield it.has_next_async()):
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 427, in _help_tasklet_along
value = gen.throw(exc.__class__, exc, tb)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/query.py", line 1793, in has_next_async
yield self._fut
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/context.py", line 890, in helper
batch, i, ent = yield inq.getq()
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/query.py", line 969, in run_to_queue
batch = yield rpc
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 513, in _on_rpc_completion
result = rpc.get_result()
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/api/apiproxy_stub_map.py", line 613, in get_result
return self.__get_result_hook(self)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/datastore/datastore_query.py", line 2951, in __query_result_hook
self.__results = self._process_results(query_result.result_list())
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/datastore/datastore_query.py", line 2984, in _process_results
for result in results]
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/datastore/datastore_rpc.py", line 194, in pb_to_query_result
return self.pb_to_entity(pb)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 690, in pb_to_entity
modelclass = Model._lookup_model(kind, self.default_model)
File "/base/alloc/tmpfs/dynamic_runtimes/python27g/7894e0c59273b2b7/python27/python27_lib/versions/1/google/appengine/ext/ndb/model.py", line 3101, in _lookup_model
kind)
KindError: No model class found for kind 'Test'. Did you forget to import it?
