automatically fill in some fields of a form, storing authenticated user

[Benedict Verheyen]

I'm not sure how to do those tasks:

1. For a model, i want to allow the user to import settings from another
database. For instance, they fill in a number and hit a link or button,
then data is looked up in another database and some of these values
are then filled in the form so that when the user creates an object,
part of the data is prefilled by fetching from another database.

How can i fill in some fields of a form with data?
I think i'll need to make my own Manipulator, defining the fields and
passing default values, right?
Is there an example around somewhere for this?

2. A closely related question in regards to user authentication.
I have a model that also stores the user that is logged.
That user field shouldn't be visible on the form and should be automatically
filled in before the form is saved.
I found something about "follow" that allows one to exclude some fields.
If i then insert the correct user before the data gets validated, is that a
good way of dealing with this problem?

    data = "">    if data:
        new_data = data.copy()
        -> Insert user <-
        errors = self.get_validation_errors(new_data)

Thanks,
Benedict
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