Meltano

Hey all, we are using tap-quickbooks so we want mapper to transform fields name so using meltano-map-transformer

my changes are
`mappers:`
  `- name: meltano-map-transformer`
    `variant: meltano`
    `pip_url: git+<https://github.com/MeltanoLabs/meltano-map-transform.git>`
    `mappings:`
    `- name: change-field-name`
      `config:`
        `stream_maps:`
          `Customer:`
            `Name: DisplayName`
            `__else__: __NULL__ #drop all others`

else part is not working, so does anyone know how to drop others' fields

Hi <@U08A0QL8VUL>!

That should certainly work. There are examples in <https://github.com/MeltanoLabs/meltano-map-transform/blob/4272a8390e85e8e17d1a2d09ef97b2e50c5082b8/meltano.yml>.