class ChangeGovukGuixRevisionsPrimaryKey < ActiveRecord::Migration[5.1]
  def change
    execute 'ALTER TABLE govuk_guix_revisions DROP CONSTRAINT govuk_guix_revisions_pkey;'
    execute 'ALTER TABLE govuk_guix_revisions ADD PRIMARY KEY (commit_hash);'
    remove_column :govuk_guix_revisions, :id
  end
end