Fix unqualified column references.

Fix various places to avoid unqualified column references to prevent any
potential ambiguous column errors.

app/models/comment.rb

@@ -65,7 +65,7 @@ class Comment < ApplicationRecord
   end
 
   def update_last_commented_at_on_destroy
-    other_comments = Comment.where("post_id = ? and id <> ?", post_id, id).order("id DESC")
+    other_comments = Comment.where("post_id = ? and id <> ?", post_id, id).order(id: :desc)
     if other_comments.count == 0
       Post.where(:id => post_id).update_all(:last_commented_at => nil)
     else

app/models/forum_post.rb

@@ -127,7 +127,7 @@ class ForumPost < ApplicationRecord
   end
 
   def update_topic_updated_at_on_delete
-    max = ForumPost.where(:topic_id => topic.id, :is_deleted => false).order("updated_at desc").first
+    max = ForumPost.where(topic_id: topic.id, is_deleted: false).order(updated_at: :desc).first
     if max
       ForumTopic.where(:id => topic.id).update_all(["updated_at = ?, updater_id = ?", max.updated_at, max.updater_id])
     end
@@ -140,7 +140,7 @@ class ForumPost < ApplicationRecord
   end
 
   def update_topic_updated_at_on_destroy
-    max = ForumPost.where(:topic_id => topic.id, :is_deleted => false).order("updated_at desc").first
+    max = ForumPost.where(topic_id: topic.id, is_deleted: false).order(updated_at: :desc).first
     if max
       ForumTopic.where(:id => topic.id).update_all(["response_count = response_count - 1, updated_at = ?, updater_id = ?", max.updated_at, max.updater_id])
     else

app/models/news_update.rb

@@ -3,7 +3,7 @@
 class NewsUpdate < ApplicationRecord
   belongs_to :creator, class_name: "User"
   belongs_to_updater
-  scope :recent, -> {where("created_at >= ?", 2.weeks.ago).order("created_at desc").limit(5)}
+  scope :recent, -> {where("created_at >= ?", 2.weeks.ago).order(created_at: :desc).limit(5)}
 
   def self.visible(user)
     if user.is_admin?

app/models/post.rb

@@ -983,11 +983,11 @@ class Post < ApplicationRecord
     end
 
     def random_up(key)
-      where("md5 < ?", key).reorder("md5 desc").first
+      where("md5 < ?", key).reorder(md5: :desc).first
     end
 
     def random_down(key)
-      where("md5 >= ?", key).reorder("md5 asc").first
+      where("md5 >= ?", key).reorder(md5: :asc).first
     end
 
     def sample(query, sample_size)

app/models/saved_search.rb

@@ -90,7 +90,7 @@ class SavedSearch < ApplicationRecord
       def labels_for(user_id)
         SavedSearch
           .where(user_id: user_id)
-          .order("label")
+          .order(label: :asc)
           .pluck(Arel.sql("distinct unnest(labels) as label"))
       end
     end

app/models/tag.rb

@@ -295,11 +295,11 @@ class Tag < ApplicationRecord
 
       case params[:order]
       when "name"
-        q = q.order("name")
+        q = q.order(name: :asc)
       when "date"
-        q = q.order("id desc")
+        q = q.order(id: :desc)
       when "count"
-        q = q.order("post_count desc")
+        q = q.order(post_count: :desc)
       when "similarity"
         q = q.order_similarity(params[:fuzzy_name_matches]) if params[:fuzzy_name_matches].present?
       else

app/models/user.rb

@@ -657,13 +657,13 @@ class User < ApplicationRecord
 
       case params[:order]
       when "name"
-        q = q.order("name")
+        q = q.order(name: :asc)
       when "post_upload_count"
-        q = q.order("post_upload_count desc")
+        q = q.order(post_upload_count: :desc)
       when "note_count"
-        q = q.order("note_update_count desc")
+        q = q.order(note_update_count: :desc)
       when "post_update_count"
-        q = q.order("post_update_count desc")
+        q = q.order(post_update_count: :desc)
       else
         q = q.apply_default_order(params)
       end

app/models/wiki_page.rb

@@ -94,7 +94,7 @@ class WikiPage < ApplicationRecord
 
       case params[:order]
       when "title"
-        q = q.order("title")
+        q = q.order(title: :asc)
       when "post_count"
         q = q.includes(:tag).order("tags.post_count desc nulls last").references(:tags)
       else