[web2py] Referencing other tables, two ways of doing it

[Sergi Pons Freixes]

Is there any difference between:

db.define_table('sample_table,
    Field('sample_field', 'text'),
    Filed('referenced_field', db.another_table))

and

db.define_table('sample_table,
    Field('sample_field', 'text'),
    Filed('referenced_field', ' reference another_table'))

?

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