bigInteger('type')->default(2)->comment('行政级别'); }); Schema::table('w_m_s_waybills', function (Blueprint $table) { $table->string('ReservedField01')->nullable()->comment('预留字段1'); }); Schema::table('waybills', function (Blueprint $table) { $table->string('source_bill')->after('waybill_number')->nullable()->comment('上游单号'); }); } /** * Reverse the migrations. * * @return void */ public function down() { Schema::table('cities', function (Blueprint $table) { $table->dropColumn('type'); }); Schema::table('w_m_s_waybills', function (Blueprint $table) { $table->dropColumn('ReservedField01'); }); Schema::table('waybills', function (Blueprint $table) { $table->dropColumn('source_bill'); }); } }