diff --git a/packages/hydrooj/src/handler/discussion.ts b/packages/hydrooj/src/handler/discussion.ts
index a3b19c8a2..c182bc2e6 100644
--- a/packages/hydrooj/src/handler/discussion.ts
+++ b/packages/hydrooj/src/handler/discussion.ts
@@ -245,8 +245,8 @@ class DiscussionDetailHandler extends DiscussionHandler {
         for (const uid of uids) {
             message.send(1, uid, msg, message.FLAG_RICHTEXT | message.FLAG_UNREAD);
         }
-        await discussion.addReply(domainId, did, this.user._id, content, this.request.ip);
-        this.back();
+        const drid = await discussion.addReply(domainId, did, this.user._id, content, this.request.ip);
+        this.back({ drid });
     }
 
     @param('drid', Types.ObjectID)
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 99a528e04..6c4210d47 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -776,8 +776,8 @@ export class ProblemSolutionHandler extends ProblemDetailHandler {
     @param('content', Types.Content)
     async postSubmit(domainId: string, content: string) {
         this.checkPerm(PERM.PERM_CREATE_PROBLEM_SOLUTION);
-        await solution.add(domainId, this.pdoc.docId, this.user._id, content);
-        this.back();
+        const psid = await solution.add(domainId, this.pdoc.docId, this.user._id, content);
+        this.back({ psid });
     }
 
     @param('content', Types.Content)