SelectItem can not setDefaultValues

[heavenite]

I use SelectItem for multiselection in a DynamicForm. I can save data to DB normally. But when I get data from service, I can not successfully setDefaultValues. The code is attached, please advice.

		final DynamicForm form3;
		{
			form3 = new DynamicForm();
			vm.addMember(form3);
			form3.setNumCols(2);

			DataSource targetsItemDS = DataSource.get("apPositionDMI");
			SelectItem bulletinTargetsItem = new SelectItem();
			bulletinTargetsItem.setOptionDataSource(targetsItemDS);
			bulletinTargetsItem.setDisplayField("boPositionKey");
			bulletinTargetsItem.setValueField("id");
			bulletinTargetsItem.setMultiple(true);
			bulletinTargetsItem.setTitle(i18n.bulletinTargets());
			bulletinTargetsItem.setName("positionList");
			bulletinTargetsItem.setShowTitle(true);
			bulletinTargetsItem.setTitleAlign(Alignment.LEFT);
			// bulletinTargetsItem.setHint("<nobr>(multi -select, pick list)</nobr>");
			if (record != null) {
				String postitionIds = record.getAttribute("postitionIds");
				if (postitionIds != null && postitionIds.length() > 0) {
					 bulletinTargetsItem.setDefaultValues(postitionIds.split(","));
				}
			}

			form3.setColWidths(leftWidth, "*");
			form3.setFields(bulletinTargetsItem);
			formLayout.addMember(form3);
		}

[Isomorphic]

First, use logging or step-through debugging to determine if you are actually passing valid data to setDefaultValues(). Then, if you think the data is valid, try a similar call by modifying a Showcase sample, and if that reproduces the error, show the modified Showcase code.