DialectAwareSqlType<T extends Object>.via constructor
const
DialectAwareSqlType<T extends Object>.via ({
- required BaseSqlType<
T> fallback, - required Map<
SqlDialect, BaseSqlType< overrides,T> >
Creates a DialectAwareSqlType that uses the fallback
type by default,
but can apply overrides
on some database systems.
For instance, this can be used to create a custom type that stores uuids
as TEXT
on databases with no builtin UUID type, but otherwise uses the
native format:
class UuidAsTextType implements CustomSqlType<Uuid> { ... }
const uuidType = DialectAwareSqlType.via(
fallback: UuidAsTextType(),
overrides: {
SqlDialect.postgres: PgTypes.uuid,
}
);
Implementation
const factory DialectAwareSqlType.via({
required BaseSqlType<T> fallback,
required Map<SqlDialect, BaseSqlType<T>> overrides,
}) = _ByDialectType<T>;