Reply To: How can I exclude purchases with unassigned transaction IDs in GA4?

[Jacob]

It looks like you may need to add a conditional check to ensure that the transaction_id has a value before pushing the purchase event into the dataLayer. Using Shopify’s Liquid language, you can implement a simple check around the dataLayer.push() function that checks whether the transaction_id (or order.order_number in your code) has been set. You’d do this by wrapping the purchase event inside an if statement that checks if order.order_number is not empty. If the order.order_number is not available, the purchase event won’t be pushed to the data layer. If there are other places in the code where you’re pushing data to dataLayer, you’d also need to implement similar conditional checks. As always, after making these changes, remember to test thoroughly to make sure it works as expected and does not interfere with other functions or tracking features.