idfield and the entries need to have a gap. So for example if you have ids 1, 2, 3 and 10, it will add fake entries with ids 4,5,6,7,8 and 9. For types without a gap in its ids, nothing will be added. Only one gap is being detected.
surnamebut Blowson only detecs
lastname, so it would only fill in a random string and not a latname. This can be solved with custom filed names like this:
surname__lastname. This field will be detected as
lastname, and in the extended data outputed as
surname. An example:
lastname, so your template variable should be
__, for example
__prename. You can use this for something like this:
__idand it will be removed in the output. Of course you can't use relationships in this usecase.
___id. An example: