Life saver! :)
Use this code and it works like a charm. 

requires=IS_EMPTY_OR(IS_IN_DB(db, 'category.id','%(name)s'))




On Friday, May 6, 2016 at 4:32:24 PM UTC+2, Anthony wrote:
>
> Please read the documentation: 
> http://web2py.com/books/default/chapter/29/07/forms-and-validators#Database-validators
>
> The third argument lets you specify how you want the items represented via 
> Python string formatting (or alternatively using a function).
>
> Anthony
>
> On Friday, May 6, 2016 at 10:14:23 AM UTC-4, Vic Ding wrote:
>>
>> Dear all,
>>
>> I have the following table definition;
>>
>> db.define_table('category',
>>                 auth.signature,
>>                 Field('name','string'),
>>                 Field('parent', 'reference category', 
>> requires=IS_EMPTY_OR(IS_IN_DB(db, 'category.id'))),
>>                 format='%(name)s'
>> )
>>
>>
>> In the database management and SQLFORM I get the cat id in the drop down 
>> instead of the name. I would like to see the name instead of the plain ID. 
>> Any idea how?
>>
>> Thanks!
>>
>

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