Maybe I dreamt it but it seems to me that there was a way to define a
field like another field except for the name and label but I can't
recall how it was done.

It would be similar to table inheritance:
http://web2py.com/book/default/chapter/06#Self-Reference-and-Aliases
but at a field level.

Uses?
Field templating where common field definitions are used as standard
components of tables in a somewhat reverse way (define fields before
tables):

Field('name','string',length=20,requires=IS_NOT_EMPTY())

db.define_table('person', as('name','firstname'), as('name',
'lastname'), ...)

so firstname and lastname would be non-null strings of len 20

Maybe it is not a good idea but I want to hear your opinions.

Denes.

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