Hi,
I have 3 tables - tbl_item, tbl_item_sku, and tbl_item_lot
Table tbl_item has 2 FKs
my mapper is pretty simple:
mdbItem = mapper(dbItem, tbl_item,
properties={
'sku': relation(dbItemSKU,
uselist=False,
primaryjoin=tbl_item_sku.c.id==tbl_item.c.ITEM_SKU_id,
foreign_keys=[tbl_item.c.ITEM_SKU_id]
),
'lot': relation(dbItemLot,
uselist=False,
primaryjoin=outerjoin(tbl_item_lot,tbl_item,tbl_item.c.ITEM_LOT_id==tbl_item_lot.c.id),
foreign_keys=[tbl_item.c.ITEM_LOT_id])})
as soon as I try access anything from tbl_item_lot
e.g. dbItem.lot.CODE
I am getting:
Unexpected error: <class 'sqlalchemy.exc.ProgrammingError'>
(ProgrammingError) (1064, "You have an error in your SQL syntax; check
the manual that corresponds to your MySQL server version for the right
syntax to use near 'LEFT OUTER JOIN `ITEM` ON 1 = `ITEM_LOT`.id' at
line 3") u'SELECT `ITEM_LOT`.id AS `ITEM_LOT_id`, `ITEM_LOT`.`CODE` AS
`ITEM_LOT_CODE`, `ITEM_LOT`.`SERIAL_NO` AS `ITEM_LOT_SERIAL_NO`,
`ITEM_LOT`.`COMMENT` AS `ITEM_LOT_COMMENT` \nFROM `ITEM_LOT` LEFT
OUTER JOIN `ITEM` ON %s = `ITEM_LOT`.id \nWHERE `ITEM_LOT` LEFT OUTER
JOIN `ITEM` ON %s = `ITEM_LOT`.id' [1L, 1L]
if I just access data from first join then everything is fine.
Another thing is that I have to specify foreign_keys without that I am
getting:
Unexpected error: <class 'sqlalchemy.exc.ArgumentError'> Could not
determine relation direction for primaryjoin condition '`ITEM_SKU`.id
= `ITEM`.`ITEM_SKU_id`', on relation dbItem.sku. Specify the
'foreign_keys' argument to indicate which columns on the relation are
foreign.
even the relations are setup in the database
CREATE TABLE `ITEM` (
`id` int(10) unsigned NOT NULL auto_increment,
`ITEM_SKU_id` int(10) unsigned NOT NULL,
`ITEM_LOT_id` int(10) unsigned default NULL,
PRIMARY KEY (`id`),
KEY `FK_ITEM_LOT` (`ITEM_LOT_id`),
KEY `FK_ITEM_SKU` (`ITEM_SKU_id`),
CONSTRAINT `FK_ITEM_LOT` FOREIGN KEY (`ITEM_LOT_id`) REFERENCES
`ITEM_LOT` (`id`),
CONSTRAINT `FK_ITEM_SKU` FOREIGN KEY (`ITEM_SKU_id`) REFERENCES
`ITEM_SKU` (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8
I guess I need help :-)
regards
-- jacek
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