修复新增品名代码报错问题

src/main/java/com/jeeplus/modules/warehouse/materialtype/service/MaterialTypeService.java

@@ -35,14 +35,14 @@ public class MaterialTypeService extends TreeService<MaterialTypeMapper, Materia
 	
 	@Transactional(readOnly = false)
 	public void save(MaterialType materialType) {
+		if (null != materialType.getParentIds()) {
 			String [] parentIdsArr = materialType.getParentIds().split(",");
 			if (parentIdsArr.length >= 2) {
 				materialType.setLast(1);
 			} else {
 				materialType.setLast(0);
 			}
-
-
+		}
 		super.save(materialType);
 	}