From a category view (list of topics) you can go to tools -> merge to merge new topics into old ones.
how to add custom fields to topic?
topic only has fields like
uid, cid, title, contend, tags, pinedetc. I want to add a custom field to every topic like
price: 50, subtitle: 'foo'to internal topic DB and then retrieve later for users. Any ideas? Thanks!
Here you go!
This should get you started. You'll need to edit the composer.tpl, or inject html at composer load, checking if the post is a new topic.