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: 20160510012552_fix_categories.rb
    path of file: ./repos/catarse/db/migrate
    
    the code of the file until where you have to start completion: class FixCategories < ActiveRecord::Migration
  def change
    execute <<-SQL
    CREATE OR REPLACE VIEW "1".categories as
    SELECT c.id,
    c.name_pt AS name,
    count(DISTINCT p.id) FILTER (WHERE is_current_and_online(p.expires_at, p.state::text)) AS online_projects,
    ( SELECT count(DISTINCT cf.user_id) A
    
  def change
    execute <<-SQL
    CREATE OR REPLACE VIEW "1".categories as
    SELECT c.id,
    c.name_pt AS name,
    count(DISTINCT p.id) FILTER (WHERE is_current_and_online(p.expires_at, p.state::text)) AS online_projects,
    ( SELECT count(DISTINCT cf.user_id) AS count
           FROM category_followers cf
          WHERE cf.category_id = c.id) AS followers,
    (EXISTS ( SELECT true AS bool
           FROM category_followers cf
          WHERE cf.category_id = c.id AND cf.user_id = current_user_id())) AS following
   FROM categories c
     LEFT JOIN projects p ON p.category_id = c.id
  GROUP BY c.id;
    SQL
  end