具有该表的复合键/外键的映射表
我试图映射一个具有复合键的表,并映射另一个引用该表的表。
假设这些表:
- 带有相关列的
ITEMDELIVERY
:-
ITEMDELIVERY_ID
-
DELIVERY_DATE
-
-
ITEMDELIVERYDETAIL
及相关列:-
ITEMDELIVERYDETAIL_ID
-
ITEMDELIVERY_ID
-
PARTITIONDATE
-
列ITEMDELIVERY.ITEMDELIVERY_ID
和ITEMDELIVERY.DELIVERY_DATE
一起构成PK。
列ITEMDELIVERYDETAIL.ITEMDELIVERY_ID
和ITEMDELIVERYDETAIL.PARTITIONDATE
形成从ITEMDELIVERYDETAIL
到ITEMDELIVERY
的FK。
我该如何映射?
我尝试了以下方法:
IAutoMappingOverride
:
mapping.References(x => x.ItemDelivery) .Columns("ITEMDELIVERY_ID", "PARTITIONDATE");
IAutoMappingOverride
:
mapping.CompositeId().KeyProperty(x => x.Id, "ITEMDELIVERY_ID") .KeyProperty(x => x.DeliveryDate, "DELIVERY_DATE");
但是这不起作用,导致System.InvalidCastException: Invalid cast from 'DateTime' to 'Double'.
在会话上调用SaveOrUpdate
时。
更新:
我刚刚检查了生成的SQL,它显示NHibernate以某种方式切换值:
INSERT INTO ITEMDELIVERYDETAIL (ITEMDELIVERYDETAIL_ID, AMOUNT, PROCESSED_BY_REM, SINGLE_ITEM_PRICE, ITEMDELIVERY_ID, PARTITIONDATE, SupplierInvoice_id) VALUES (hibernate_sequence.nextval, :p0, :p1, :p2, :p3, :p4, :p5) returning ITEMDELIVERYDETAIL_ID into :nhIdOutParam; :p0 = 20.12.2011 16:29:44 [Type: Double (0)], :p1 = 6 [Type: DateTime (0)], :p2 = 21.12.2011 16:29:44 [Type: Double (0)], :p3 = 7 [Type: Int32 (0)], :p4 = 0 [Type: DateTime (0)], :p5 = 19.12.2011 16:29:44 [Type: Int32 (0)], :nhIdOutParam = 27638398 [Type: Int32 (0)]
如你所见,参数完全混乱……
它们应该是这样的:
:p0 = 6 [Type: Double (0)], :p1 = 21.12.2011 16:29:44 [Type: DateTime (0)], :p2 = 7 [Type: Double (0)], :p3 = 0 [Type: Int32 (0)], :p4 = 19.12.2011 16:29:44 [Type: DateTime (0)], :p5 = 27638398 [Type: Int32 (0)], :nhIdOutParam = NULL [Type: Int32 (0)]
我解决了这个问题。 这种奇怪行为的原因是我有一个显式属性PartitionDate
也被映射( mapping.Map(x => x.PartitionDate).Column("PARTITIONDATE");
)。
这基本上意味着PARTITIONDATE
列已映射两次。