try this trick:
db.Table1.blah = db.Table1.bar.clone(name = 'blah', _rname='bar')
db(...).select(db.Table1.blah)
On Tuesday, August 29, 2017 at 3:11:36 AM UTC+3, Paolo Caruccio wrote:
>
> Maybe
>
> def test():
> rows = db(db.Table1.foo==db.Table2.foo).select(db.Table1.foo.
> with_alias('foo'), db.Table2.bar.with_alias('blah'))
> for row in rows:
> print row.foo, row.blah
> return locals()
>
> should work.
>
> Another way - if you can rewrite tables definitions - is to use the
> "rname" field value. From the web2py book
> http://www.web2py.com/books/default/chapter/29/06/the-database-abstraction-layer?#Field-constructor
>
>
>>
>> *rname* provides the field was a "real name", a name for the field known
>> to the database adapter; when the field is used, it is the rname value
>> which is sent to the database. *The web2py name for the field is then
>> effectively an alias*.
>
>
> So with
>
> db.define_table('Table2', Field('blah', 'string', rname="bar")
>
> the query becomes
>
> db(db.Table1.foo==db.Table2.foo).select(db.Table1.foo, db.Table2.blah)
>
> If you want alias fields in a query without joins you could write
>
> rows = db(db.Table2.id>0).select('bar AS blah')
>
>
>
> Il giorno lunedì 28 agosto 2017 08:50:20 UTC+2, Brendan Barnwell ha
> scritto:
>>
>> On Monday, July 31, 2017 at 1:25:31 PM UTC-7, Paolo Caruccio wrote:
>>>
>>> Maybe the web2py book could help you:
>>>
>>>
>>> http://www.web2py.com/books/default/chapter/29/06/the-database-abstraction-layer?search=with_alias#Self-Reference-and-aliases
>>>
>>>
>> That appears to only be talking about using aliases for tables, and
>> specifically to be able to create and query tables that reference one
>> another. What I'm describing is conceptually much simpler than that: I
>> just want to take a query that already works and give my own names to the
>> columns of the result.
>>
>
--
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