On Wed, 23 Nov 2011 10:59:03 +0100
Enrico Morelli <[email protected]> wrote:
> These are the mappers:
> mapper(Ligand, ligand_table,
> properties={
> 'ligand':relationship(LigandLigand,
> primaryjoin=and_(ligand_table.c.id==ligand_ligand_table.c.ligand_id1,
> ligand_table.c.id==ligand_ligand_table.c.ligand_id2),
> backref=backref('ligandligand') ), })
>
> mapper(LigandLigand, ligand_ligand_table,
> properties={
> 'first_sphere': relationship(Ligand,
>
> primaryjoin=and_(ligand_ligand_table.c.ligand_id2==ligand_table.c.id,
>
> ligand_ligand_table.c.ligand_id1==ligand_table.c.id),
> backref=backref('root')),
> })
>
> When I try to access to the ligand.ligand properties, this is empty
> even if in the db there are relations. Where is the problem?
>
> Thanks
>
>
I think to have solved the problem changing the logical operator in the
primaryjoin from and_ to or_.
Now when I remove the relations I have the following warning:
SAWarning: Multiple rows returned with uselist=False for lazily-loaded attribute
'LigandLigand.ligandligand' value = callable_(passive=passive)
What means?
--
-------------------------------------------------------------------
(o_
(o_ //\ Coltivate Linux che tanto Windows si pianta da solo.
(/)_ V_/_
+------------------------------------------------------------------+
| ENRICO MORELLI | email: [email protected] |
| * * * * | phone: +39 055 4574269 |
| University of Florence | fax : +39 055 4574253 |
| CERM - via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY |
+------------------------------------------------------------------+
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sqlalchemy?hl=en.
