Boto3: S3 multipart upload: how to add parts?

[tgal]

Hi! I'm not sure how to do this, could you clarify? (boto3 0.0.7)

>>> import boto3
>>> s3 = boto3.resource('s3')
>>> bucket = s3.Bucket('ubitricity-backup')
>>> o = bucket.Object('test')
>>> mpu = o.initiate_multipart_upload()
>>> part = mpu.MultipartUploadPart(1)
>>> part.upload('datadatadata')
{u'ETag': '"d41d8cd98f00b204e9800998ecf8427e"', 'ResponseMetadata': {'HTTPStatusCode': 200, 'HostId': 'leCanviHIAh0lS9UursVkiMiyzksNVMAn+jYgyClzp5us8mpCjwB06WEeifjy7LX', 'RequestId': '6C5B491C7D0E7060'}}
>>> mpu.complete()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/boto3/resources/factory.py", line 379, in do_action
    response = action(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/boto3/resources/action.py", line 77, in __call__
    response = getattr(parent.meta.client, operation_name)(**params)
  File "/usr/local/lib/python2.7/dist-packages/botocore/client.py", line 299, in _api_call
    raise ClientError(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (InvalidRequest) when calling the CompleteMultipartUpload operation: You must specify at least one part

I understand the MultipartUploadPart is not being added to the MultipartUpload object. But how is it done? I was looking for a method like mpu.add_part() but there is none.

Thank you!

[danielgtaylor]

@tgal take a look at the answer in https://github.com/boto/boto3/issues/50#issuecomment-72079954 that shows how you do this with clients. For resources, you need to create the same structure and do something like:

mpu.complete(MultipartUpload=part_info)

We are working on some documentation updates that will describe the input parameter structure as well as the output response structure to make this easier.

[danielgtaylor]

@tgal I've gone ahead and added an integration test as part of #62 that should help.

[balihoo-gens]

Would certainly be nice if the test contained more than one part.

[SandyWalsh]

yes, please update for multiple parts.