On Thu, Jan 07, 2016 at 03:03:22PM +0000, Paul Otto Seidon <p.osei...@datec.at>
wrote:
> Hi all,
>
> this seems somehow related to a recent post asking about "querying for
> foreign key". Here as well, I guess, tables have to be joined, but I
> don't see how to pack this into a single ORDERBY clause.
>
> The main table is Entry, which owns _status = ForeignKey( "Status").
> Status owns a field 'value' besides some other fields. Now I would like
> the Entry rows I select by some other criterion (e.g. their priority) be
> ordered by the value field of the Status of the Entry.
>
> When I ORDERBY Status.q._value then SQLOBJECT correctly tells me, that
> Entry doesn't own a _value field. All other combinations don't work
> neither.
>
> This has to be done more SQL-ish, right?
>
> Anyone willing to help me out here?
class Test1(SQLObject):
name = StringCol()
test2 = ForeignKey('Test2')
class Test2(SQLObject):
age = IntCol()
Test2.createTable()
Test1.createTable()
test2_1 = Test2(age=0)
test2_2 = Test2(age=42)
Test1(name='1', test2=test2_1)
Test1(name='2', test2=test2_2)
print list(Test1.select(Test1.q.test2 == Test2.q.id, orderBy=Test2.q.age))
Output:
SELECT test1.id, test1.name, test1.test2_id FROM test1, test2 WHERE
((test1.test2_id) = (test2.id)) ORDER BY test2.age
[<Test1 1 name='1' test2ID=1>, <Test1 2 name='2' test2ID=2>]
> Cheers
> Paul
Oleg.
--
Oleg Broytman http://phdru.name/ p...@phdru.name
Programmers don't die, they just GOSUB without RETURN.
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