Read from PromotionLog.

r2/r2/lib/pages/pages.py

@@ -3148,6 +3148,7 @@ class PromoteLinkForm(Templated):
                                else g.default_sr)
             # have the promo code wrap the campaigns for rendering
             self.link = promote.editable_add_props(link)
+            self.promotion_log = promote.PromotionLog.get(link)
 
         if not c.user_is_sponsor:
             self.now = promote.promo_datetime_now().date()

r2/r2/templates/promotelinkform.html

@@ -510,7 +510,7 @@ ${unsafe(js.use('sponsored'))}
       <input id="promote_note" name="note" value="" type="text" size="40" />
       <button type="submit">save</button>
       <div class="notes">
-        %for line in getattr(thing.link, "promotion_log", []):
+        %for line in thing.promotion_log:
           <p>${line}</p>
         %endfor
       </div>