FIX: deleting a topic result not updated on screen

app/assets/javascripts/discourse/controllers/topic.js.es6

@@ -758,7 +758,6 @@ export default Ember.Controller.extend(SelectedPostsCount, BufferedContent, {
   },
 
   deleteTopic() {
-    this.unsubscribe();
     this.get('content').destroy(Discourse.User.current());
   },
 

lib/post_destroyer.rb

@@ -109,8 +109,11 @@ class PostDestroyer
   # When a user 'deletes' their own post. We just change the text.
   def mark_for_deletion
     I18n.with_locale(SiteSetting.default_locale) do
+
+      # don't call revise from within transaction, high risk of deadlock
+      @post.revise(@user, { raw: I18n.t('js.post.deleted_by_author', count: SiteSetting.delete_removed_posts_after) }, force_new_version: true)
+
       Post.transaction do
-        @post.revise(@user, { raw: I18n.t('js.post.deleted_by_author', count: SiteSetting.delete_removed_posts_after) }, force_new_version: true)
         @post.update_column(:user_deleted, true)
         @post.update_flagged_posts_count
         @post.topic_links.each(&:destroy)
@@ -122,9 +125,11 @@ class PostDestroyer
     Post.transaction do
       @post.update_column(:user_deleted, false)
       @post.skip_unique_check = true
-      @post.revise(@user, { raw: @post.revisions.last.modifications["raw"][0] }, force_new_version: true)
       @post.update_flagged_posts_count
     end
+
+    # has internal transactions, if we nest then there are some very high risk deadlocks
+    @post.revise(@user, { raw: @post.revisions.last.modifications["raw"][0] }, force_new_version: true)
   end
 
   private