"TypeError: Parameter to MergeFrom() must be instance of same class" during campaign mutate

[Bob Rzadzki]

The code below loops over a list `response` containing tuples where the first element (`c[0]` in the snippet) is a campaign ID:

for c in response:
   campaign_operation = client.get_type('CampaignOperation')
   operation = campaign_operation.update
   operation.resource_name = campaign_service.campaign_path(google_id, c[0])
   operation.status = client.enums.CampaignStatusEnum.PAUSED
   client.copy_from(campaign_operation.update_mask, protobuf_helpers.field_mask(None, operation._pb))
   operations.append(operation)

campaign_response = campaign_service.mutate_campaigns(customer_id=google_id, operations=operations)

The last line throws the following exception:

Traceback (most recent call last):
  File "F:/.../campaign_pauser.py", line 162, in <module>
    campaign_response = campaign_service.mutate_campaigns(customer_id=google_id, operations=operations)
  File "F:\...\venv\lib\site-packages\google\ads\googleads\v8\services\services\campaign_service\client.py", line 610, in mutate_campaigns
    request.operations = operations
  File "F:\...\venv\lib\site-packages\proto\message.py", line 641, in __setattr__
    self._pb.MergeFrom(self._meta.pb(**{key: pb_value}))
TypeError: Parameter to MergeFrom() must be instance of same class: expected google.ads.googleads.v8.services.CampaignOperation got Campaign.

The code I'm using is essentially from the documentation here:

https://github.com/googleads/google-ads-python/blob/master/examples/basic_operations/update_campaign.py

Cannot understand why there's a type mismatch happening. Any help appreciated.

[Google Ads API Forum Advisor]

Hi Bob,

This support chanel handles API communications, for help with the Ads API Python client library you can go to their issue tracker.

With that being said, if you are using version 14 of the library there's some extra configuration necessary regarding Protobuf Messages.

Regards,

Aryeh Baker Google Ads API Team

ref:_00D1U1174p._5004Q2QFXHg:ref

[Bob Rzadzki]

Thanks for pointing me in the right direction!