How to find a Tridion Schema using the Namespace Uri

Question

While working on an environment upgrade, we stumbled upon a weird publishing error which told us some schema had a wrong namespace uri. We got an error

'RenderComponentPresentation()' had error 'Unexpected namespace URI: xyz. Expecting: abc.'

Unfortunately, from the error or the logging, we couldn't really find out which schema was causing the problem.

Is there a way to, just using the namespace url, find the schema ?

Answer 1

We were able to find the schema that caused issues by using the powershell modules provided by Peter Kjaer (https://github.com/pkjaer/tridion-powershell-modules).

With this module, we were able to write and execute the following command (the function was also provided by Peter in one of the samples)

function Get-TridionChildItem([string]$Id, [int[]]$ItemType, [switch]$Recursive, [switch]$ExpandProperties)
{
       $client = Get-TridionCoreServiceClient;
       $filter = new-object Tridion.ContentManager.CoreService.Client.OrganizationalItemItemsFilterData;
       $filter.ItemTypes = $itemType;
       $filter.Recursive = $Recursive;

       if ($ExpandProperties)
       {
              return $client.GetList($id, $filter) | Get-TridionItem;
       }
       else 
       {
              return $client.GetList($id, $filter);    
       }
       $client.Close();
}
Get-TridionChildItem -Id 'tcm:1-1-2' -ItemType 8 -Recursive -ExpandProperties | Where-Object {$_.NamespaceUri -eq "xyz"} 

As a result, we received all information of the schemas we were looking for. The same code could be used to quickly search for something based on one of the item's properties

Answer 2

The Core Service has a method called GetSchemasByNamespace, which returns all Schemas with a given Namespace URI (and optionally a Root Element Name).