#399

backend/app/services/post_create_preflight.rb

@@ -9,9 +9,10 @@ class PostCreatePreflight
     end
   end
 
-  def initialize attributes:, thumbnail: nil
+  def initialize attributes:, thumbnail: nil, host: nil
     @attributes = attributes.symbolize_keys
     @thumbnail = thumbnail
+    @host = host
   end
 
   def run
@@ -124,7 +125,7 @@ class PostCreatePreflight
     return nil if post_id.blank?
 
     post = Post.with_attached_thumbnail.find_by(id: post_id)
-    PostCompactRepr.base(post)
+    PostCompactRepr.base(post, host: @host)
   end
 
   def final_field_warnings field_warnings