I have a relation [1:n] from table A to table B.
define_table('A',
Field('name', type='string'))
define_table('B',
Field('ref_a', type='reference A'))
Then I have this grid
qry = db.A.id>0
grid = SQLFORM.grid(qry,links=links)
How do I write links (and the lambda function in it) in order to have in
the grid an additional column with the count of references to A
(db.B.ref_a.count()) ?
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