Move PostgresExtensions to ApplicationRecord.

app/models/application_record.rb

@@ -43,5 +43,13 @@ class ApplicationRecord < ActiveRecord::Base
     end
   end
 
+  concerning :PostgresExtensions do
+    class_methods do
+      def columns(*params)
+        super.reject {|x| x.sql_type == "tsvector"}
+      end
+    end
+  end
+
   include ApiMethods
 end

app/models/comment.rb

@@ -260,5 +260,3 @@ class Comment < ApplicationRecord
     DText.quote(body, creator_name)
   end
 end
-
-Comment.connection.extend(PostgresExtensions)

app/models/post.rb

@@ -1797,5 +1797,3 @@ class Post < ApplicationRecord
     ret
   end
 end
-
-Post.connection.extend(PostgresExtensions)

config/initializers/postgres_extensions.rb

@@ -1,5 +0,0 @@
-module PostgresExtensions
-  def columns(*params)
-    super.reject {|x| x.sql_type == "tsvector"}
-  end
-end