[web2py] Circula relationship

[Oscar]

There is another way to do this?

categories = db.Table(db, 'categories',
                              Field('id', 'id'),
                              Field('name', 'string', length=512,
requires=(IS_SLUG())),
                              Field('title', 'string', length=512,
required=True),
                              Field('description', 'text',
default=""),
                              Field('created_on', 'datetime',
default=datetime.datetime.today()),
                              Field('enabled', 'boolean',
default=True),
                              migrate=self.i2p.config.is_first_time)

db.define_table('categories', categories, Field('parent_id',
categories))

Regards,

Oscar.