fix

virgo.api/src/main/java/com/bosshand/virgo/api/service/ProjectService.java

@@ -240,7 +240,7 @@ public class ProjectService {
 		List<String> bimIds = new ArrayList<>();
 		List<BimModelTarget> bimList = bimModelTargetDao.getProjectItemTargetIds(targetIds);
 		for (BimModelTarget bim : bimList) {
-			if (bim.getBims() != null) {
+			if (StringUtil.notBlank(bim.getBims())) {
 				String[] split = bim.getBims().split(",");
 				for (int i = 0; i < split.length; i++) {
 					bimIds.add(split[i]);