set_primary_key

# File activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb, line 392
      def set_primary_key(table_name, id, primary_key, **options)
        if id && !as
          pk = primary_key || Base.get_primary_key(table_name.to_s.singularize)

          if id.is_a?(Hash)
            options.merge!(id.except(:type))
            id = id.fetch(:type, :primary_key)
          end

          if pk.is_a?(Array)
            primary_keys(pk)
          else
            primary_key(pk, id, **options)
          end
        end
      end