Question

以下是我迁移中的代码：

public function up()
{
    Schema::table('companies', function (Blueprint $table) {
        $table->char('default_unit_for_weight', 2)->default('kg')->after('notes')->change();
        $table->char('default_currency', 3)->default('EUR')->after('default_unit_for_weight')->change();
    });
}

当我运行迁移时，出现以下错误：

[Doctrine\DBAL\DBALException] Unknown column type "char" 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 forgot 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.

当我检查\Doctrine\DBAL\Types\Type课时，我找到了以下代码：

const TARRAY = 'array';
const SIMPLE_ARRAY = 'simple_array';
const JSON_ARRAY = 'json_array';
const BIGINT = 'bigint';
const BOOLEAN = 'boolean';
const DATETIME = 'datetime';
const DATETIMETZ = 'datetimetz';
const DATE = 'date';
const TIME = 'time';
const DECIMAL = 'decimal';
const INTEGER = 'integer';
const OBJECT = 'object';
const SMALLINT = 'smallint';
const STRING = 'string';
const TEXT = 'text';
const BINARY = 'binary';
const BLOB = 'blob';
const FLOAT = 'float';
const GUID = 'guid';

这意味着Doctrine不支持数据类型CHAR。有没有办法可以使用CHAR数据类型更改Laravel 5.1中的列属性？

Answer 1

您必须添加几行

    use Doctrine\DBAL\Types\StringType;
    use Doctrine\DBAL\Types\Type;
    
    public function up() {
        if (!Type::hasType('char')) {
        Type::addType('char', StringType::class);
       $table->char('default_unit_for_weight', 2)->default('kg')->after('notes')->change();
        $table->char('default_currency', 3)->default('EUR')-> 
         after('default_unit_for_weight')->change();
       
    
    }

https://github.com/laravel/framework/issues/27518

Answer 2

您可以使用原始查询进行迁移（DB :: statement（'query'）），但我不确定Eloquent是否会出现恐慌，但它不应该

无法使用CHAR数据类型更新Laravel 5.1中的列属性

2 个答案: