Apache Beam Google Datastore ReadFromDatastore 实体 protobuf [英] Apache Beam Google Datastore ReadFromDatastore entity protobuf

问题描述

我正在尝试使用 apache beam 的谷歌数据存储 API 来读取数据存储

I am trying to use apache beam's google datastore api to ReadFromDatastore

p = beam.Pipeline(options=options)
(p
 | 'Read from Datastore' >> ReadFromDatastore(gcloud_options.project, query)
 | 'reformat'            >> beam.Map(reformat)
 | 'Write To Datastore'  >> WriteToDatastore(gcloud_options.project))

传递给我的重新格式化函数的对象是类型

The object that gets passed to my reformat function is type

google.cloud.proto.datastore.v1.entity_pb2.Entity

google.cloud.proto.datastore.v1.entity_pb2.Entity

采用 protobuf 格式，难以修改或阅读.

It is in protobuf format which is hard to modify or read.

我想我可以将 entity_pb2.Entity 转换为 dict

I think I can convert a entity_pb2.Entity to a dict with

entity= dict(google.cloud.datastore.helpers._property_tuples(entity_pb))

但由于某种原因尝试导入以下两个库给了我一些错误:

But for some reason trying to import the following two libraries gives me some errors:

import google.cloud.datastore.helpers  
from apache_beam.io.gcp.datastore.v1.datastoreio import ReadFromDatastore 

错误:

Traceback (most recent call last):
  File "/home/nburn42/MotoGarage/MotoGarage/MotoGarageBackgroundJobs/format_data.py", line 16, in <module>
    import google.cloud.datastore.helpers
  File "/usr/local/lib/python2.7/dist-packages/google/cloud/datastore/__init__.py", line 57, in <module>
    from google.cloud.datastore.batch import Batch
  File "/usr/local/lib/python2.7/dist-packages/google/cloud/datastore/batch.py", line 24, in <module>
    from google.cloud.datastore import helpers
  File "/usr/local/lib/python2.7/dist-packages/google/cloud/datastore/helpers.py", line 29, in <module>
    from google.cloud.grpc.datastore.v1 import entity_pb2 as _entity_pb2
  File "/usr/local/lib/python2.7/dist-packages/google/cloud/grpc/datastore/v1/entity_pb2.py", line 28, in <module>
    dependencies=[google_dot_api_dot_annotations__pb2.DESCRIPTOR,google_dot_protobuf_dot_struct__pb2.DESCRIPTOR,google_dot_protobuf_dot_timestamp__pb2.DESCRIPTOR,google_dot_type_dot_latlng__pb2.DESCRIPTOR,])
  File "/usr/local/lib/python2.7/dist-packages/google/protobuf/descriptor.py", line 824, in __new__
    return _message.default_pool.AddSerializedFile(serialized_pb)
TypeError: Couldn't build proto file into descriptor pool!
Invalid proto descriptor for file "google/cloud/grpc/datastore/v1/entity.proto":
  google.datastore.v1.PartitionId.project_id: "google.datastore.v1.PartitionId.project_id" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.PartitionId.namespace_id: "google.datastore.v1.PartitionId.namespace_id" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.PartitionId: "google.datastore.v1.PartitionId" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.partition_id: "google.datastore.v1.Key.partition_id" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.path: "google.datastore.v1.Key.path" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.PathElement.id_type: "google.datastore.v1.Key.PathElement.id_type" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.PathElement.kind: "google.datastore.v1.Key.PathElement.kind" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.PathElement.id: "google.datastore.v1.Key.PathElement.id" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.PathElement.name: "google.datastore.v1.Key.PathElement.name" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.PathElement: "google.datastore.v1.Key.PathElement" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key: "google.datastore.v1.Key" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.ArrayValue.values: "google.datastore.v1.ArrayValue.values" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.ArrayValue: "google.datastore.v1.ArrayValue" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.value_type: "google.datastore.v1.Value.value_type" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.null_value: "google.datastore.v1.Value.null_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.boolean_value: "google.datastore.v1.Value.boolean_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.integer_value: "google.datastore.v1.Value.integer_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.double_value: "google.datastore.v1.Value.double_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.timestamp_value: "google.datastore.v1.Value.timestamp_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.key_value: "google.datastore.v1.Value.key_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.string_value: "google.datastore.v1.Value.string_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.blob_value: "google.datastore.v1.Value.blob_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.geo_point_value: "google.datastore.v1.Value.geo_point_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.entity_value: "google.datastore.v1.Value.entity_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.array_value: "google.datastore.v1.Value.array_value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.meaning: "google.datastore.v1.Value.meaning" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value.exclude_from_indexes: "google.datastore.v1.Value.exclude_from_indexes" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Value: "google.datastore.v1.Value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity.key: "google.datastore.v1.Entity.key" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity.properties: "google.datastore.v1.Entity.properties" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity.PropertiesEntry.key: "google.datastore.v1.Entity.PropertiesEntry.key" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity.PropertiesEntry.value: "google.datastore.v1.Entity.PropertiesEntry.value" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity.PropertiesEntry: "google.datastore.v1.Entity.PropertiesEntry" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Entity: "google.datastore.v1.Entity" is already defined in file "google/cloud/proto/datastore/v1/entity.proto".
  google.datastore.v1.Key.partition_id: "google.datastore.v1.PartitionId" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Key.path: "google.datastore.v1.Key.PathElement" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.ArrayValue.values: "google.datastore.v1.Value" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Value.key_value: "google.datastore.v1.Key" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Value.entity_value: "google.datastore.v1.Entity" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Value.array_value: "google.datastore.v1.ArrayValue" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Entity.PropertiesEntry.value: "google.datastore.v1.Value" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Entity.key: "google.datastore.v1.Key" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.
  google.datastore.v1.Entity.properties: "google.datastore.v1.Entity.PropertiesEntry" seems to be defined in "google/cloud/proto/datastore/v1/entity.proto", which is not imported by "google/cloud/grpc/datastore/v1/entity.proto".  To use it here, please add the necessary import.

我可以做些什么来将 entity_pb2.Entity 转换为可用的东西吗?
ReadFromDatastore 现在对于实际使用来说太新了吗?
我应该使用另一种方法吗?

Is there something I can do to convert a entity_pb2.Entity to something usable?
Is the ReadFromDatastore just too new for real use right now?
Is there another approach I should be using?

谢谢，
内森

推荐答案

最新版本的 Apache Beam 2.13 弃用了这种使用旧 googledatastore 库的旧方法，并添加了使用更新且更人性化的 google-cloud-datastore 库.

The latest version of Apache Beam 2.13 deprecates this old approach of using the old googledatastore library, and adds a new implementation that uses the newer and more human-friendly google-cloud-datastore library.

https:///beam.apache.org/releases/pydoc/2.13.0/apache_beam.io.gcp.datastore.v1new.datastoreio.html

https://github.com/apache/beam/pull/8262

还有一个未解决的问题需要添加示例，所以现在您必须弄清楚那部分.

There's still an open issue to add an example, so for now you'll have to figure that part out.

https://issues.apache.org/jira/browse/BEAM-7350

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