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: 20141223144205_use_payer_name_on_report.rb
    path of file: ./repos/catarse/db/migrate
    
    the code of the file until where you have to start completion: class UsePayerNameOnReport < ActiveRecord::Migration
  def change
    drop_view :contribution_reports_for_project_owners

    execute <<-SQL
          CREATE OR REPLACE VIEW contribution_reports_for_project_owners AS
          SELECT
            b.project_id,
            coalesce(r.id, 0) as reward_id,
            p.user_id as project_owner_id,
            r.description as reward_description,
            r.deliver_at::date as deliver_at,
            b.confirmed_at::date,
            b.value as contribution_value,
            (b.value* (SELECT value::numeric FROM settings WHERE name = 'catarse_fee') ) as service_fee,
            u.email as user_email,
            u.cpf as cpf,
            b.payer_name
    
  def change
    drop_view :contribution_reports_for_project_owners

    execute <<-SQL
          CREATE OR REPLACE VIEW contribution_reports_for_project_owners AS
          SELECT
            b.project_id,
            coalesce(r.id, 0) as reward_id,
            p.user_id as project_owner_id,
            r.description as reward_description,
            r.deliver_at::date as deliver_at,
            b.confirmed_at::date,
            b.value as contribution_value,
            (b.value* (SELECT value::numeric FROM settings WHERE name = 'catarse_fee') ) as service_fee,
            u.email as user_email,
            u.cpf as cpf,
            b.payer_name as user_full_name,
            u.name as user_name,
            b.payer_email as payer_email,
            b.payment_method,
            b.anonymous,
            b.state as state,
            coalesce(u.address_street, b.address_street) as street,
            coalesce(u.address_complement, b.address_complement) as complement,
            coalesce(u.address_number, b.address_number) as address_number,
            coalesce(u.address_neighbourhood, b.address_neighbourhood) as neighbourhood,
            coalesce(u.address_city, b.address_city) as city,
            coalesce(u.address_state, b.address_state) as address_state,
            coalesce(u.address_zip_code, b.address_zip_code) as zip_code
          FROM
            contributions b
          JOIN users u ON u.id = b.user_id
          JOIN projects p ON b.project_id = p.id
          LEFT JOIN rewards r ON r.id = b.reward_id
          WHERE
            b.state IN ('confirmed', 'waiting_confirmation');
    SQL
  end