Your original problem was that this:
Field('lab', db.auth_group, label='Lab Name',
represent=lambda id,row: str(row.role)+' Lab',
default=db.auth_group(current.auth.user_id) ),
Field('member',db.auth_user'),
)
should have been
Field('lab', db.auth_group, label='Lab Name',
represent=lambda id,row: str(row.role)+' Lab',
default=current.auth.user_id),
Field('member',db.auth_user'),
)
The default value of a reference field bust be None or the id if a
referenced record, not the record itself. Sorry for not catching this
before.
On Wednesday, 12 December 2012 06:04:48 UTC-6, Kostas M wrote:
>
> Massimo thank you for your response.
> Unfortunately, I have not the traceback now, since I chose to build a
> separate table, not referring to db.auth_group. This
> is a kind of duplication in regards to auth_group, but it makes simple the
> handling of my lab_members table:
>
> db.define_table('lab_members',
> Field('lab',label='Lab Name',
> default= auth.user_id and auth.user.username,
> writable=False,
> ),
> Field('member',unique=True,requires=IS_NOT_EMPTY()),
> )
>
> The strange thing in this case again, is the :
> default= auth.user_id and auth.user.username,
> which I have taken from an older answer of yours:
>
>
> https://groups.google.com/forum/?fromgroups=#!searchin/web2py/Re:$20Record$20Versioning/web2py/e55el7q_-kk/XkG1hN5w9VYJ
>
> If i run my application on -S appname mode, having just: "default=
> auth.user.username,", this error comes back:
> Traceback (most recent call last):
> File "/home/kmouts/web2py/gluon/restricted.py", line 212, in restricted
> exec ccode in environment
> File "applications/lims/models/db.py", line 140, in <module>
> default= auth.user.username,
> AttributeError: 'NoneType' object has no attribute 'username'
>
> So it seems a check has to be made first if a current user exists (by
> auth.user_id )and then to try to get the attribute username from auth.user.
>
>
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