Index: umc/widgets/Grid.js
===================================================================
--- umc/widgets/Grid.js	(Revision 31887)
+++ umc/widgets/Grid.js	(Arbeitskopie)
@@ -304,8 +304,9 @@
 				return;
 			}
 			var ilabel = dojo.isFunction(iaction.label) ? iaction.label() : iaction.label;
+			var ifield = dojo.isFunction(iaction.field) ? iaction.field() : iaction.field ? iaction.field : this.moduleStore.idProperty;
 			gridColumns.push({
-				field: this.moduleStore.idProperty,
+				field: ifield,
 				name: this.actionLabel ? ilabel : ' ',
 				width: ! this.actionLabel && iaction.iconClass ? '28px':  this._getHeaderWidth( ilabel ) + 'px',
 				description: iaction.description,