[web2py] on_define in dummy table

[黄祥]

hi,

i want to create table inheritance using dummy table (from web2py book), 
but when i try to mix it with on_define, the result is not expected (no 
errors occured)
e.g.
*not work*
def on_define_detail_0(table):
    table.product.label = T('123')
   """ cutted """

detail_0 = db.Table(db, 'detail_0',
    Field('product', 'reference product'), 
    on_define = on_define_detail_0)
    
*work*
detail_0 = db.Table(db, 'detail_0',
    Field('product', 'reference product', label = T('123') ) )

is it possible to use on_define in dummy table? 

thanks and best regards,
stifan

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