forum_topics/show: fix N+1 query patterns.

app/controllers/forum_topics_controller.rb

@@ -36,7 +36,8 @@ class ForumTopicsController < ApplicationController
       @forum_topic.mark_as_read!(CurrentUser.user)
     end
     @forum_posts = ForumPost.search(:topic_id => @forum_topic.id).reorder("forum_posts.id").paginate(params[:page])
-    @forum_posts = @forum_posts.reverse_order.includes(:creator).load if request.format.atom?
+    @forum_posts = @forum_posts.includes(:creator, :bulk_update_request)
+    @forum_posts = @forum_posts.reverse_order.load if request.format.atom?
     respond_with(@forum_topic)
   end
 

app/models/forum_post.rb

@@ -90,18 +90,12 @@ class ForumPost < ApplicationRecord
     end
   end
 
-  def tag_change_request
-    bulk_update_request || tag_alias || tag_implication
-  end
-
   def reportable_by?(user)
     visible?(user) && creator_id != user.id && !creator.is_moderator?
   end
 
   def votable?
-    TagAlias.where(forum_post_id: id).exists? ||
+    bulk_update_request.present? && bulk_update_request.is_pending?
-      TagImplication.where(forum_post_id: id).exists? ||
-      BulkUpdateRequest.where(forum_post_id: id).exists?
   end
 
   def voted?(user, score)

app/views/forum_post_votes/_list.html.erb

@@ -11,6 +11,6 @@
   <%= render "forum_post_votes/vote", vote: vote, forum_post: forum_post %>
 <% end %>
 
-<% if forum_post.tag_change_request && forum_post.tag_change_request.is_pending? && !votes.by(CurrentUser.user.id).exists? %>
+<% if forum_post.votable? && !votes.by(CurrentUser.user.id).exists? %>
   <%= render "forum_post_votes/add_vote", vote: votes.by(CurrentUser.user.id).first, forum_post: forum_post %>
 <% end %>

app/views/forum_post_votes/_vote.html.erb

@@ -4,7 +4,7 @@
 %>
 
 <li class="vote-score-<%= vote.vote_type %>">
-  <% if forum_post.tag_change_request && forum_post.tag_change_request.is_pending? && vote.creator_id == CurrentUser.id %>
+  <% if forum_post.votable? && vote.creator_id == CurrentUser.id %>
     <%= link_to content_tag(:i, nil, class: "far #{vote.fa_class}"), forum_post_vote_path(vote, format: "js"), remote: true, method: :delete %>
     <%= link_to_user vote.creator %>
   <% else %>

app/views/forum_posts/_forum_post.html.erb

@@ -40,7 +40,7 @@
         <% if forum_post.reportable_by?(CurrentUser.user) %>
           <li><%= link_to "Report", new_moderation_report_path(moderation_report: { model_type: "ForumPost", model_id: forum_post.id }), remote: true, title: "Report this forum post to the moderators" %></li>
         <% end %>
-        <% if forum_post.votable? %>
+        <% if forum_post.bulk_update_request.present? %>
           <ul class="votes" id="forum-post-votes-for-<%= forum_post.id %>">
             <%= render "forum_post_votes/list", votes: forum_post.votes, forum_post: forum_post %>
           </ul>

test/unit/forum_post_test.rb

@@ -14,17 +14,6 @@ class ForumPostTest < ActiveSupport::TestCase
       CurrentUser.ip_addr = nil
     end
 
-    context "#votable?" do
-      setup do
-        @post = FactoryBot.build(:forum_post, :topic_id => @topic.id, :body => "[[aaa]] -> [[bbb]]")
-        @tag_alias = FactoryBot.create(:tag_alias, forum_post: @post)
-      end
-
-      should "be true for a post associated with a tag alias" do
-        assert(@post.votable?)
-      end
-    end
-
     context "that mentions a user" do
       context "in a quote block" do
         setup do