commit

src/main/java/com/budwk/app/zhgh/democratic/teachercongress/prepare/service/impl/TeacherCongressSessionServiceImpl.java

@@ -33,6 +33,7 @@ import org.nutz.dao.Dao;
 import org.nutz.ioc.aop.Aop;
 import org.nutz.ioc.loader.annotation.Inject;
 import org.nutz.ioc.loader.annotation.IocBean;
+import org.nutz.lang.Lang;
 import org.nutz.lang.random.R;
 
 import java.util.Date;
@@ -258,7 +259,10 @@ public class TeacherCongressSessionServiceImpl extends BaseServiceImpl<Teacher_c
      * @param children  子集
      */
     private void insertInstitution(String sessionId, String parentId, List<Tree<String>> children) {
-        for (Tree<String> child : children) {
+        if(Lang.isEmpty(children)) {
+			return;
+		}
+		for (Tree<String> child : children) {
             Teacher_congress_institution newInstitution = new Teacher_congress_institution();
             newInstitution.setId(null);
             newInstitution.setSessionId(sessionId);