How to filter Target Types for specific Publication using Core Service?

Question

I already got solution like getting all the Target Types for all Publications and then filtering the Target Types based on particular Publication (like checking all Target Type is being used in which Publications). So i am getting the correct result like all available of Target Types for particular Publication.

I am using the following code:

List<TridionItem> pubTargetList = new List<TridionItem>();
var pubTargets = client.GetClient.GetSystemWideList(new PublicationTargetsFilterData());
foreach (PublicationTargetData pubTargetdata in pubTargets)
{

    PublicationTargetData target = (PublicationTargetData)client.GetClient.Read(pubTargetdata.Id, new ReadOptions());                   
    LinkToPublicationData[] pubDataItems = target.Publications;

    foreach (LinkToPublicationData publicationData in pubDataItems)
    {
        if (publicationData.IdRef == publicationId)
        {
            pubTargetList.Add(new TridionItem()
            {
                Id = pubTargetdata.Id,
                Name = pubTargetdata.Title
            });
        }
    }
}

But I think there might be better way to retrieve the Target Types based on Publication directly. Any further information will be very helpful.

Thanks, Debabrata

Answer 1

I'm afraid there is no better (or shorter) way than your mentioned solution.

One would probably, expecting a property like PublicaitonData.Targets.

I think API designers have purposely decided not to implement this as it would lead to performance issues, especially in the Core service API.

If the goal is to retrieve the targets data faster, I would cache the results of the above implementation. For example, at application startup, retrieve all targets data and store it in a List/Set for all Publications or the required one(for any subsequent retrieval).

Answer 2

You will need to do a SystemWideList with a TargetTypesFilterData filter, with the ForRepository property set.

Here is an example in PowerShell:

$client = Get-TridionCoreServiceClient

$filter = New-Object Tridion.ContentManager.CoreService.Client.TargetTypesFilterData
$linkToPublication = New-Object Tridion.ContentManager.CoreService.Client.LinkToRepositoryData
$linkToPublication.IdRef = 'tcm:0-6-1'
$filter.ForRepository = $linkToPublication

$client.GetSystemWideList($filter)