title: Displaying DataObject name in summary fields of DataObjectManager
body: <p>Firstly I'm using version 2.4.7 of SilverStripe.  I have a has_one relationship between a DataObject I am using, with DataObjectManager, and another DataObject.  I want to display the name of the DataObject in the summary fields of the DataObjectManager but I keep getting the error below.  </p>
  
  <p>Uncaught Exception: Object->__call(): the method 'fortemplate' does not exist on 'Store'</p>
  
  <p>I assume it is because I have it in a has_one relationship but I'm not sure.  Does anyone have any suggestions about how I can do this?</p>
  
  <p>Thanks</p>