I use Zapier to automatically create new contacts in our Notion contacts database based on email submissions. It fills the name and email address, but can't fill the relation field. Any workarounds?
You can't select custom fields from an external database using Zapier, because you are not filling anything as the other fields do with information, you are trying to select a custom item from an external database and that is not possible as it is impossible to know which one of the external, custom and random item it is needed.
Hopefully that makes sense.
If you explain the complete scenario, there may be a way to achieve it with a workaround.