在 Laravel 9 中，在数据库迁移中，修改字段类型 unsignedTinyInteger，报错：Unknown column type “tinyinteger” requested.

1、在 Laravel 9 中，在数据库迁移中，修改字段类型 unsignedTinyInteger，报错：Unknown column type “tinyinteger” requested.。如图1

图1

$table->unsignedTinyInteger('status')->default(1)->comment('状态，1：待处理；2：处理中；3：可换单；4：已完成')->change();

Unknown column type "tinyinteger" requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspection then you might have forgotten to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information.

2、由于 Laravel 的 Schema 构建器更新字段属性，不支持字段类型：unsignedTinyInteger，因此，需要使用原生 SQL 语句

use Illuminate\Support\Facades\DB;

DB::statement("ALTER TABLE return_orders MODIFY status tinyint unsigned NOT NULL DEFAULT 1 COMMENT '状态，1：待处理；2：处理中；3：可换单；4：已完成'");

3、执行迁移，更新成功，如图2

图2

`status` tinyint unsigned NOT NULL DEFAULT '1' COMMENT '状态，1：待处理；2：处理中；3：可换单；4：已完成',