How to expose individual form elements from user-register-form So I have a work flow/use case as such:


an administrator user creates a user account, associating it to the "guest" role
the guest users receive a login link
once they log in, I want them to provide some information (in this case, rsvp status, a custom field I've added to the user profile)


Is it possible to display just the rsvp form field of the registration form, so they can update it when they log in (e.g., they submit one field only and the profile is updated)?

Is there another way to do this? I'd rather do this in code since it's part of a custom module that is nearly completed.
If your doing your own module hook_form_alter is the way to go. so long as all required fields are already supplied you should be able to set all other fields to have type hidden.

If you are looking to do something similar you may want to look at the event and rspv modules.