You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20140711233329_badges_only_on_public_categories.rb
    path of file: ./repos/discourse/db/migrate
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class BadgesOnlyOnPublicCategories < ActiveRecord::Migration[4.2]
  de
    
  def up
    execute "DROP VIEW badge_posts"

    execute "CREATE VIEW badge_posts AS
    SELECT p.*
    FROM posts p
    JOIN topics t ON t.id = p.topic_id
    JOIN categories c ON c.id = t.category_id
    WHERE c.allow_badges AND
          p.deleted_at IS NULL AND
          t.deleted_at IS NULL AND
          NOT c.read_restricted AND
          t.visible"
  end