Andreas Moog via FreeIPA-users wrote:
> Hello there,
> 
> I need to change the length and default value of an existing attribute for a 
> user. In this case, the displayname. I thought I could simply add a plugin 
> with:
> 
> from ipaserver.plugins.user import user
> from ipalib import Str, _
> user.takes_params += (
>         Str('displayname?',
>             label=_('Display name'),
>             default_from=lambda givenname, sn: '%s%s' % (givenname[0], 
> sn[0:3]),
>             maxlength=5,
>             autofill=True,
>         ),
>     )
> 
> But that results in an error:
> AttributeError: cannot override NameSpace.displayname value...
> 
> What am I doing wrong? Is this not the right way to do it? This is with 
> FreeIPA 4.9.13 on RedHat 8.

You can't replace or extend an existing parameter. I think the best you
could do in this case is a pre_callback() to enforce the length.

rob

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