Customize default sort behaviour

[Andriy Chapran]

Using postgres 12, @nestjsx/crud 5.0.0-alpha.3, is there any better way of overriding default NULL values sorting behaviour?
There is a need to put all entries with null field values at the end of the order. So far I've made a workaround with overwriting req.parsed.sort param directly with NULLS LAST postfix, like this:

  @Override()
  getMany(@ParsedRequest() req: CrudRequest) {
    const dateSortParam = req.parsed.sort.find(
      (param) => param.field === 'date',
    );

    if (dateSortParam) {
      // @ts-expect-error Enforce null date values to be the last
      dateSortParam.order = `${dateSortParam.order} NULLS LAST`;
    }

    return this.base.getManyBase!(req);
  }

It works, but looks a bit cumbersome since you need to override the controller method, and suppress the typescript error for the order value not being one of 'ASC' | 'DESC'. I know not all the relational dbs support options like 'NULLS LAST | FIRST', but I didn't find any info related to this kind of customisations in the documentation.
Is there any way to make it nice and smooth using the library's API?