create_table

# File activerecord/lib/active_record/migration/compatibility.rb, line 175
        def create_table(table_name, **options)
          if connection.adapter_name == "PostgreSQL"
            if options[:id] == :uuid && !options.key?(:default)
              options[:default] = "uuid_generate_v4()"
            end
          end

          unless connection.adapter_name == "Mysql2" && options[:id] == :bigint
            if [:integer, :bigint].include?(options[:id]) && !options.key?(:default)
              options[:default] = nil
            end
          end

          # Since 5.1 PostgreSQL adapter uses bigserial type for primary
          # keys by default and MySQL uses bigint. This compat layer makes old migrations utilize
          # serial/int type instead -- the way it used to work before 5.1.
          unless options.key?(:id)
            options[:id] = :integer
          end

          super
        end