On Wed, Oct 14, 2009 at 4:44 PM, Giedrius <[email protected]> wrote:
>
> How i can make recursive one to many relation? I want to have
> generalized categories like: Programing langauge / High level /
> Python, Programing langauge / Low level / C, Programing langauge /
> High level / PHP, Programing langauge / Low level / ASM and so on..
> I tried to like this, but got an error:
>
> db.define_table('category',
> Field('name'),
> Field('parent_id', db.category),
> Field('info'))
>
To do self-reference or forward reference, use this form:
Field('parent_id', 'reference category'),
You can find more about this in section 6.13 of the Manual, "Self-Reference
and Aliases"
( http://www.web2py.com/examples/default/docs )
- Yarko
>
>
> Traceback (most recent call last):
> File "/home/giedrius/web2py/gluon/restricted.py", line 178, in
> restricted
> exec ccode in environment
> File "/home/giedrius/web2py/applications/shop/models/db.py", line
> 74, in <module>
> Field('parent_id', db.category),
> File "/home/giedrius/web2py/gluon/sql.py", line 537, in __getattr__
> return dict.__getitem__(self,key)
> KeyError: 'category'
>
> >
>
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