drizzle-orm

SKILL.md

When you need a column with a branded TypeScript type but no actual data transformation, use $type () instead of customType.

If toDriver and fromDriver would be identity functions (x) => x, use $type () instead.

Even with identity functions, customType still invokes mapFromDriverValue on every row:

細雨 ORM 模式用於類型品牌和自定義類型。在使用 Drizzle 列定義、品牌類型或自定義類型轉換時使用。 來源：epicenterhq/epicenter。

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