Hi!
I am angry, I wasted half a day to catch this error:
db.define_table('tbl',
Field('name'),
Field.Virtual('alias_name', lambda row: row.name) # right
notation is `row.tbl.name`
)
in controller:
rows = db(db.tbl).select() #it's OK! It doesn't cause any error, it returns
rows!
#but when you try to:
print rows[0].alias_name # it causes error, because there isn`t any
key/attribute
like `alias_name`
So, how can I detect that error in Field.Virtual?
What happens if for one of the rows Field.Virtual returns something like
above? It won't have this field? - yes!
I spent some tests and catch, that:
Field.Virtual('alias_name', lambda row: 1/0) # causes an error when
select()! - expected
but
Field.Virtual('alias_name', lambda row: row.
*neverhood_will_be_processed_without_any_errors*) # but row won't have `
*neverhood**...*`
--
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- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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