[web2py] query by giving the table name and the field name

[Jose]

Hi,

Given the following model:

db.define_table('mytable',
    Field('fa'),
    Field('fb'),
    Field('fc'),
)

I can do:

def test():
    # get mytable object (type Table) given the name of the table
(str)
    mytable = db['mytable']

    # get a_field object (type Field) given the name of the field
(str)
    a_field = mytable['fb']

    return dict(mytable=mytable, a_field=a_field)

What I do is with these two objects (mytable, a_field) build a query

def test():
    mytable = db['mytable']
    a_field = mytable['fb']
    rows = db(mytable.a_field == 'something')

    return dict(rows=rows)

But this is not possible.
Specifically, how you can build a similar query by giving the table
name and the field name (as string)?

Jose