Ortb requests and legacy native responses

[Hamper]

Type of issue

I think this is a bug

Description

I trying to use native examples from documentation but get some errors when trying to use adTemplates with appnexus native placement from https://docs.prebid.org/dev-docs/adunit-reference.html#adUnit-native-example with template from https://docs.prebid.org/prebid/native-implementation.html#421-prebidjs-adunit-setup

Steps to reproduce

"mediaTypes": {
    "native": {
        sendTargetingKeys: false,
        adTemplate: `<div class="sponsored-post">
                <div class="thumbnail" style="background-image: url(##hb_native_asset_id_1##);"></div>
                <div class="content">
                    <h1>
                        <a href="%%CLICK_URL_UNESC%%##hb_native_linkurl##" target="_blank" class="pb-click" hb_native_asset_id="2">##hb_native_asset_id_2##</a>
                    </h1>
                    <p>##hb_native_asset_id_4##</p>
                    <div class="attribution">##hb_native_asset_id_3##</div>
                </div>
            </div>`,
        ortb: {
            ver: "1.2",
            assets: [{
                id: 1,
                required: 1,
                img: {
                    type: 1,
                    hmin: 50,
                    wmin: 1
                },
            }, {
                id: 2,
                //required: 1,
                title: {
                    len: 80
                },
            }, {
                id: 3,
                //required: 1,
                data: {
                    type: 1,
                    len: 30
                },
            }, {
                id: 4,
                //required: 1,
                data: {
                    type: 2,
                    len: 100
                },
            }, {
                id: 5,
                //required: 1,
                img: {
                    type: 3,
                    hmin: 200,
                    wmin: 267
                }
            }]
        }
    }
},
"bids": [{
    bidder: 'appnexus',
    params: {
        placementId: 13232354
    }
}]

Expected results

Valid ad rendering

Actual results

Error in console:

Only legacy assets in response (don't see hb_native_asset_id_[X])

hb_native_asset_id_[X] placeholders not replaced

Platform details

prebid.js v7.39.0
PUC v1.16.0-pre (my build because I use custom prebid global object)

[dgirardi]

I cannot reproduce - but I discovered another (related?) bug in this scenario, addressed in #9638

The error message in the OP is about validation, it complains that an adUnit is defining both ortb and "legacy" native properties such as image, title, etc. However, the adUnit in the OP is formatted properly, and does not generate that error for me. Would you be able to reproduce it in a test page?

Instead that adUnit breaks in another way - the "legacy" bid from appnexus is not rendered properly when the adUnit uses a "new" native.ortb. That should be fixed with #9638.

[patmmccann]

@Hamper are you able to provide a test page?