How to link bidResponse to bidRequest?

[nanek]

Type of issue

Question

Description

Prior to #3440, I could find the bidRequest that related to a bidResponse by using adId. I could then pull params such as placementId from the bidRequest to use in our analytics. Going forward what is the preferred way to link a bidResponse object to a bidRequest object? Or is there another way to get the placementId from a bidResponse?

#3440 indicates The bid.requestId is meant to be the tie between the bid response object and the bidRequest.bids object. however I don't see requestId in the bidResponse, at least for appnexus responses in prebid 2.7.

Use case: I have two placementIds linked to one adUnitCode, I would like to be able to distinguish which placementId won in reporting.

[piotr-yuxuan]

Hi!
Bid response's requestId must be equal to request's bidId. It's up to your adapter endpoint to correctly return an array of BidObject items.

[jsnellbaker]

@nanek When you say that you don't see the requestId in the bidResponse, at least for appnexus responses in prebid 2.7 - at which point in the auction are you doing this check?

The requestId part of the bid gets assigned to it while the bid is being processed through the bidderFactory code (see here), so it may be a slight timing issue of when you're running the check.

[nanek]

I'm using pbjs.getBidResponses() after the ads have rendered. I don't see requestId there.

[jsnellbaker]

@nanek Thanks for the clarification; I did some digging and found there was a piece of logic in one of the functions to remove the requestId field from the bids that came back through these public functions. This was done at the time since the requestId and adId fields had the same value.

Based on some internal discussion, it was agreed that this removal is no longer needed. I'm going to put together a PR for this update soon.

[jsnellbaker]

Created the above PR; should hopefully get included soon.

[jsnellbaker]

@nanek FYI This update went out with the 2.9.0 release yesterday. Please let me know if you still have any trouble.