Change History section doesn't appear after passage to CDS 9

[dimdusart]

Hello,

We have updated our cap app to CDS 9 with also the latest version of this plugin for a production app we have.

Based on my db/schema.cds :

entity PurchaseOrders : cuid, managed {
    orderNumber          : String   @assert.unique  @mandatory;
    ...
    status               : Association to Status default '1';
    items                : Composition of many PurchaseOrderItems
                               on items.order = $self;
    comments             : Association to many PurchaseOrderComments
                               on comments.order = $self;
    quanTagStatus        : String;
    quanTagText          : String;
}

@Capabilities.DeleteRestrictions: {Deletable: false}
@Capabilities.InsertRestrictions: {Insertable: false}
entity PurchaseOrderItems : cuid, managed {
    order                    : Association to PurchaseOrders;
    itemNumber               : String not null                                                                                    @readonly  @assert.unique;
    originalReadyDate        : Date                                                                                               @readonly;
    confirmedReadyDate       : Date                                                                                               @readonly;

    @Measures.Unit       : 'PC'
    quantityInCases          : Decimal                                                                                            @readonly;

    @Measures.Unit       : 'PC'
    confirmedQuantityInCases : Decimal(13, 3)                                                                                     @mandatory;

    @Measures.Unit       : 'PC'
    quantityInUnits          : Decimal = cartonPack * (confirmedQuantityInCases > 0 ? confirmedQuantityInCases : quantityInCases) @readonly;

    @Measures.Unit       : unitOfVolume
    volume                   : Decimal(13, 3)                                                                                     @readonly;

    @Measures.Unit       : unitOfVolume
    confirmedVolume          : Decimal(13, 3)                                                                                     @readonly;
    unitOfVolume             : String                                                                                             @readonly;

    @Measures.Unit       : unitOfWeight
    weight                   : Decimal(13, 3)                                                                                     @readonly;

    @Measures.Unit: unitOfWeight
    confirmedWeight          : Decimal(13, 3);
    unitOfWeight             : String                                                                                             @readonly;
}

I have a service.cds with the changelog annotation :

entity PurchaseOrders            as
        projection on db.PurchaseOrders {
                *,
                null as originalReadyDate : Date @readonly,
                true as canDisplayApproverButtons: Boolean
        };

    entity PurchaseOrderItems        as
        projection on db.PurchaseOrderItems {
            *,
            false as canEnableSwitchToReject  : Boolean,
            false as isWitchToRejectVisible   : Boolean,
            false as isTagForRejectionVisible : Boolean
        }

change-tracking.cds :

using {VendorConfirmationService} from './service';
using from '@cap-js/change-tracking';

annotate VendorConfirmationService.PurchaseOrders with @changelog: [orderNumber] {
    status @changelog                                            : [status.name];
};

annotate VendorConfirmationService.PurchaseOrderItems with  @title: '{i18n>Itemnumber}'  @changelog: [
    order,
    itemNumber
]  {
    confirmedReadyDate        @changelog  @Common.Label                                            : '{i18n>Confirmedreadydate}';
    confirmedQuantityInCases  @changelog  @Common.Label                                            : '{i18n>Confirmedquantityincases}';
    volume                    @changelog  @Common.Label                                            : '{i18n>cartonVolume}';
    weight                    @changelog  @Common.Label                                            : '{i18n>cartonWeight}';
};

annotate sap.changelog.aspect @(UI.Facets: [{
    $Type        : 'UI.ReferenceFacet',
    ID           : 'ChangeHistoryFacet',
    Label        : '{i18n>ChangeHistory}',
    Target       : 'changes/@UI.PresentationVariant',
    ![@UI.PartOfPreview],,
}]);

The issue is that, and it was working a few weeks ago, but now in my app the FE object page is not generating the Change History table anymore (even before getting some records, I don't see an empty table for example) :

I don't quite get why the service is not getting or do not seem to fetch the changelog anymore, we did some changes to our model but the monitored fields in change-tracking.cds were the same and we were able to see the Change History in the past. Also I'm not able to see what's going on in debug.

Could we have some help on this issue ?

[dimdusart]

After testing, I see that if you try to put the file change-tracking.cds under srv/<name_of_your_service>/, it doesn't read the @changelog annotations hence it doesn't work. It only works if the aspect is directly under srv/, so if you have multiple service and you want to put them in folders (ex. srv/<name_of_your_service>/service.cds), you cannot do the same with the change tracker plugin.

[schiwekM]

Hi @dimdusart,

please excuse the late reply. This is CAPs default behaviour for looking up CDS files. From srv/, db/, app/ CAP automatically looks up, but it is not recursive. Thus if you structure your service folder you would need a cds file within srv/ in which all other cds files from all subfolders are imported.