To my knowledge, not without multiple calls. (Perhaps someone else knows otherwise?) It would be great if there was a feature like Stripe’s expanded responses, but Bubble doesn’t have that.
With Bubble’s Data API you will only receive this: "response": { "unique_id" : "child_id", "field_1" : "child_field", "parent" : "parent_id" }
But with the Workflow API you can determine what is returned so it could be something like this: "response": { "child": {All Child data from database} "parent": {All Parent data from database} }