This is not a bug but a limitation in syntax:
You cannot do:
db.define_table('cgc_schedule',
...
format='%(training.short_title)s (%(training_date)s)')
because only fields of the table itself can be used in the representation
of a record. In order to retrieve training.short_title for a record of
table cgc_schedule, web2py would have to go a recursive select and we do
not want to do that silently because can be expensive. There is another
notation:
db.define_table('cgc_schedule',
...
format=lambda row: '%s %s' % (row.training.short_title,
row.training_date))
and this will do what you ask since it is more explicit.
On Thursday, 7 February 2013 09:31:56 UTC-6, Calycé wrote:
>
> Hi all,
>
> I have an error in the database administration when using the following
> code in db.py:
>
> db.define_table('cgc_service_categories',
> Field('category', 'string', required=True),
> Field('description', 'text', required=True),
> Field('image', 'upload', required=True),
> Field('display_order', 'integer'),
> Field('link', 'string'),
> format='%(category)s')
>
> db.define_table('cgc_trainings',
> Field('category', db.cgc_service_categories),
> Field('disporder', 'integer'),
> Field('title', 'string', required=True),
> Field('short_title', 'string', required=True),
> Field('duration', 'string', required=True),
> Field('planning', 'text', required=True),
> Field('typical', 'text'),
> Field('price', 'integer'),
> Field('training_checks', 'boolean'),
> Field('image', 'upload'),
> format='%(short_title)s')
>
> db.define_table('cgc_schedule',
> Field('training', db.cgc_trainings),
> Field('location', 'string'),
> Field('training_date', 'date'),
> Field('vacancies', 'integer'),
> format='%(training.short_title)s (%(training_date)s)')
>
> db.define_table('cgc_booking',
> Field('training_date', db.cgc_schedule),
> Field('company', 'string'),
> Field('first_name', 'string'),
> Field('last_name', 'string'),
> Field('phone', 'string'),
> Field('email', 'string'),
> Field('seats', 'integer'))
>
> It works when I browse the existing records, but if I try to edit a record
> or insert a new one with the database administration in the cgc_booking
> table, I receive the following error:
> <type 'exceptions.AttributeError'> 'Table' object has no attribute
> 'training.short_title'
> If I change the "format" for the cgc_schedule table to "%(training)s
> (%(training_date)s)" it works but having only the id is useless in this
> case.
>
> Is it a bug in the database administration or am I doing something wrong ?
>
> BTW, I'm using 2.3.2.
>
> Thanks for your help.
>
>
> Calycé
>
>
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