core: fix discussion history

packages/hydrooj/src/handler/discussion.ts

@@ -368,15 +368,8 @@ class DiscussionRawHandler extends DiscussionHandler {
 
 class DiscussionEditHandler extends DiscussionHandler {
     async get() {
-        const path = [
-            ['Hydro', 'homepage'],
-            ['discussion_main', 'discussion_main'],
-            [this.vnode.title, 'discussion_node', { type: discussion.typeDisplay[this.ddoc.parentType], name: this.ddoc.parentId }, true],
-            [this.ddoc.title, 'discussion_detail', { did: this.ddoc.docId }, true],
-            ['discussion_edit', null],
-        ];
         this.response.template = 'discussion_edit.html';
-        this.response.body = { ddoc: this.ddoc, path };
+        this.response.body = { ddoc: this.ddoc };
     }
 
     @param('did', Types.ObjectId)

packages/hydrooj/src/model/discussion.ts

@@ -84,9 +84,11 @@ export async function get<T extends Field>(
 }
 
 export async function edit(domainId: string, did: ObjectId, $set: Partial<DiscussionDoc>) {
+    if ($set.content) {
         await coll.insertOne({
             domainId, docId: did, content: $set.content, uid: $set.editor, ip: $set.ip, time: new Date(),
         });
+    }
     return document.set(domainId, document.TYPE_DISCUSSION, did, $set);
 }
 

packages/hydrooj/src/upgrade.ts

@@ -615,4 +615,8 @@ export const coreScripts: MigrationScript[] = [
         });
         return true;
     },
+    async function _94_95() {
+        await discussion.coll.deleteMany({ content: { $not: { $type: 'string' } } });
+        return true;
+    },
 ];