On Nov 16, 2010, at 6:16 AM, Enrico Morelli wrote: > On Mon, 15 Nov 2010 15:56:06 -0500 > Michael Bayer <mike...@zzzcomputing.com> wrote: > >> its looking for a Column object. menus_table.c.weight instead of >> 'weight'. >> > > Thanks, I modified the query: > main_menu = Session.query(Menu).filter(and_(Menu.parent_id==None, > Menu.lang==session['lang'])).order_by(menus_table.c.weight.asc()).all() > > but the error is the same: > > ArgumentError: Column-based expression object expected for argument > 'order_by'; got: 'weight', type <type 'str'>
no , the mapping: mapper(Menu, menus_table, properties={ 'children': relation(Menu, order_by=menus_table.c.weight), 'permissions': relation(Permissions, backref='menus', secondary=menus_permissions_table) }) > >> >> On Nov 15, 2010, at 10:03 AM, Enrico Morelli wrote: >> >>> Dear all, >>> >>> I've a lot of applications using SA 0.5.6. Now I upgraded my >>> personal computer and now I can use SA 0.6.5 but my applications >>> stops to work. >>> >>> I receive the error: >>> ArgumentError: Column-based expression object expected for argument >>> 'order_by'; got: 'weight', type <type 'str'> >>> >>> I try to search in google but I don't understand why I receive this >>> error. Someone can explain to me? >>> >>> Thanks in advance >>> >>> This is the table declaration: >>> >>> menus_table = Table('menus', metadata, >>> Column('id', types.Integer, primary_key=True), >>> Column('parent_id', types.Integer, ForeignKey('menus.id')), >>> Column('name', types.Unicode(80), nullable=False), >>> Column('title', types.Unicode(80)), >>> Column('url', types.Unicode(80)), >>> Column('weight', types.Integer, index=True), >>> Column('lang', types.Unicode(2)) >>> ) >>> >>> This is the mapper declaration: >>> mapper(Menu, menus_table, >>> properties={ >>> 'children': relation(Menu, order_by='weight'), >>> 'permissions': relation(Permissions, backref='menus', >>> secondary=menus_permissions_table) >>> }) >>> >>> At the end the query: >>> main_menu = Session.query(Menu).filter(and_(Menu.parent_id==None, >>> Menu.lang==session['lang'])).order_by(Menu.weight.asc()).all() >>> >>> -- >>> ------------------------------------------------------------------- >>> (o_ >>> (o_ //\ Coltivate Linux che tanto Windows si pianta da solo. >>> (/)_ V_/_ >>> +------------------------------------------------------------------+ >>> | ENRICO MORELLI | email: more...@cerm.unifi.it | >>> | * * * * | 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 >>> sqlalch...@googlegroups.com. To unsubscribe from this group, send >>> email to sqlalchemy+unsubscr...@googlegroups.com. For more options, >>> visit this group at http://groups.google.com/group/sqlalchemy?hl=en. >>> >> > > > -- > ------------------------------------------------------------------- > (o_ > (o_ //\ Coltivate Linux che tanto Windows si pianta da solo. > (/)_ V_/_ > +------------------------------------------------------------------+ > | ENRICO MORELLI | email: more...@cerm.unifi.it | > | * * * * | 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 sqlalch...@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.