custom dimension with product and transaction hit - google-analytics

Question

I have some problems with using custom dimensions with enhanced ecoomerce.
code below.
I would like to add 3 custom dimensions as product scopes and it works. but still I would like to add one custom dimension to transaction as hit scope. My below code doesn't works for dimension1. where should I place 'dimension1': 'zamowienie' to have info about the whole transaction, not olny products?
dataLayer.push({
'ecommerce': {
'purchase': {
'actionField': {
'id': '194771', // Transaction ID. Required for purchases and refunds.
'dimension1': 'zamowienie',
'revenue': '35.27', // Total transaction value (incl. tax and shipping
'shipping': '5.99'
},
'products': [{
'dimension2': 'JP Delaney',
'dimension3': 'jak nowa',
'dimension4': 'ksiazka',
'name': 'Lokatorka', // Name or ID is required.
'id': '9788375150780',
'price': '27.99',
'quantity': 1 // Optional fields may be omitted or set to empty string.
},
{
'dimension2': 'Kelly Creagh',
'dimension3': 'widoczne ślady używania',
'dimension4': 'ksiazka',
'name': 'Nevermore T.1 Kruk',
'id': '9788376860657',
'price': '7.28',
'quantity': 1
}]
}
}
});

Answer 1

as long as you're using product scopes custom dimensions you need to put then alongside other product fields in the product object. In your example that would look like
{
'dimension1': 'some value',
'dimension2': 'JP Delaney',
'dimension3': 'jak nowa',
'dimension4': 'ksiazka',
'name': 'Lokatorka', // Name or ID is required.
'id': '9788375150780',
'price': '27.99',
'quantity': 1
},
however, this would make sense only to report persistent product properties otherwise your products wouldn't be aggregated properly in the reports. For example, having a product dimension value of 'zamowienie' in the transactions products but not in checkout products may result in missing that checkout steps in the funnel report with dimensions1 since those would be treated as different products.