Oh I see! So I can define the virtual/method fields that way, and then it
does make sense to keep using lazy_tables. Completely missed that point.
Thank you very much!
As always, web2py's community rocks.
El jueves, 17 de marzo de 2016, 14:59:35 (UTC-3), Anthony escribió:
>
> On Thursday, March 17, 2016 at 1:53:43 PM UTC-4, Lisandro wrote:
>>
>> Thank you very much for the quick answer.
>>
>> Your first comment made me think about the "lazy_tables" with the
>> definition of virtual method fields.
>> If you say that doing db.tablename the table is no longer lazy, *then it
>> wouldn't make sense to use lazy_tables in a particular case where almost
>> each table has a virtual method field, am I right?*
>>
>> I mean, for example, if this is my model:
>>
>> db.define_table('first_table', Field('field1'), Field('field2'))
>>
>> db.first_table.field3 = Field.Method(lambda row: 'value for field3')
>>
>
> This won't help with db.auth_user, which is defined automatically (though
> you can define it manually yourself if preferred), but you can simply do:
>
> db.define_table('first_table',
> Field('field1'),
> Field('field2'),
> Field.Method('Field3', lambda row: 'value for field3'))
>
> Note, the first argument of Field.Method() and Field.Virtual() should
> always be the field name anyway, even if you are defining them like this:
>
> db.mytable.myfield = Field.Method('myfield', ...)
>
> There are particular cases where leaving the name out can lead to problems.
>
> Anthony
>
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