I’ve been creating an AdExchange Line Item and an Ad Exchange creative on Google Ad Manager using the API.

Now I can’t create the line item creative association between the two objects.

Creative is as follows :

Creative = {
    'advertiserId': [ADVERTISER_ID],
    'id': [CREATIVE_ID],
    'name': 'My Ad Exchange creative',
    'size': {
        'width': 1,
        'height': 1,
        'isAspectRatio': False
    },
    'previewUrl': '[PREVIEW_URL]',
    'policyLabels': [],
    'appliedLabels': [],
    'lastModifiedDateTime': {[CREATION_TIME]},
    'customFieldValues': [],
    'thirdPartyDataDeclaration': None,
    'codeSnippet': "[CODE_SNIPPET]",
    'isNativeEligible': False,
    'isInterstitial': False,
    'isAllowsAllRequestedSizes': False
}

And has been created using following instructions :

Creative = {
            'advertiserId': [ADVERTISER_ID],
            'xsi_type': 'AdExchangeCreative',
            'name': 'My Ad Exchange creative',
            'size': {
                'width': 1,
                'height': 1,
                'isAspectRatio': False
            }
            ,'codeSnippet': "[CODE_SNIPPET]"
        }
service("CreativeService").createCreatives([Creative])

Line item is of course a lot bigger object but let me give some details :

line = {
    [...]
    'id': [LINE_ID],
    'lineItemType': 'AD_EXCHANGE',
    'priority': 12,
    'creativePlaceholders': [
        {
            'size': {
                'width': 1,
                'height': 1,
                'isAspectRatio': False
            },
            'creativeTemplateId': None,
            'companions': [],
            'appliedLabels': [],
            'effectiveAppliedLabels': [],
            'expectedCreativeCount': 1,
            'creativeSizeType': 'IGNORED',
            'targetingName': None,
            'isAmpOnly': False
        }
    ],
}

The important thing here is to note that line item is an AdExchange one and has a creative placeholder containing the size of the previously created creative.

I’ve been trying different setups to link the two like eg :

association = {'creativeId': [CREATIVE_ID],'lineItemId': [LINE_ID]}

or :

association = {'creativeId': [CREATIVE_ID],'lineItemId': [LINE_ID], 'sizes':[]}

or :

association = {'creativeId': [CREATIVE_ID],'lineItemId': [LINE_ID],
    sizes :[ {'width': 1,'height': 1,'isAspectRatio': False}
}

But whatever the setup among these used into the createLineItemCreativeAssociations function, I always get the same error message :

googleads.errors.GoogleAdsServerFault: [RequiredSizeError.NOT_ALLOWED @ [0].size; trigger:'1x1-null']

Has anyone bumped into that issue before, and maybe figured out a solution ?