Thumbnails are missing for our external embeds when using topic-thumbnails

pmusaraj · March 27, 2023, 1:49pm

This mostly makes sense to me, I think we’d be open to accepting a PR to core for a onebox engine for everviz.com (or similar visualization services). However, I would avoid inserting and hiding an image in the cooked post, there is a lighter option. Discourse’s post processor will look for an upload the following elements:

github.com/discourse/discourse

app/models/post.rb

main


      
            SQL
          
            builder.where("level > 0")
          
            # ignore posts that aren't replies to exactly one post
            # for example it skips a post when it contains 2 quotes (which are replies) from different posts
            builder.where("count = 1") if only_replies_to_single_post
          
            replies = builder.query_hash(post_id: id, max_reply_level: MAX_REPLY_LEVEL, topic_id: topic_id)
            replies.each { |r| r.symbolize_keys! }
          
            secured_ids = Post.secured(guardian).where(id: replies.map { |r| r[:id] }).pluck(:id).to_set
          
            replies.reject { |r| !secured_ids.include?(r[:id]) }
          end
          
          def revert_to(number)
            return if number >= version
            post_revision = PostRevision.find_by(post_id: id, number: (number + 1))
            post_revision.modifications.each do |attribute, change|
              attribute = "version" if attribute == "cached_version"

So adding the thumbnail as an anchor below the iframe might work? You could keep it visible, or hide it using a class like “hidden”.

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Thumbnails are missing for our external embeds when using topic-thumbnails

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