复合键/外键，该表映射表

问题描述

我试图映射具有复合键的表和地图另一个表引用此表

假设这些表：

1. ITEMDELIVERY 相关栏目：
   
   
   
   1. ITEMDELIVERY_ID
   
   
   2. DELIVERY_DATE
   
   


2. ITEMDELIVERYDETAIL 相关栏目：
   
   
   
   1. ITEMDELIVERYDETAIL_ID
   
   
   2. ITEMDELIVERY_ID
   
   
   3. PARTITIONDATE
   
   

列 ITEMDELIVERY。 ITEMDELIVERY_ID 和 ITEMDELIVERY.DELIVERY_DATE 共同构成了PK。结果
的列 ITEMDELIVERYDETAIL.ITEMDELIVERY_ID 和 ITEMDELIVERYDETAIL.PARTITIONDATE 从 ITEMDELIVERYDETAIL 形成FK到 ITEMDELIVERY

如何映射这个

我试过如下：？

IAutoMappingOverride< ItemDeliveryDetail> ：

  mapping.References（X => x.ItemDelivery）
 .Columns（ITEMDELIVERY_ID，PARTITIONDATE）; 
  

IAutoMappingOverride< ItemDelivery> ：

  mapping.CompositeId（）KeyProperty（X => x.Id，ITEMDELIVERY_ID）。
 .KeyProperty（X = > x.DeliveryDate，DELIVERY_DATE）; 
  

但是，这并不工作，它导致了 System.InvalidCastException：无效的转换，从日期时间到双师型。打电话时 SaveOrUpdate 的会话。

更新：

我只是检查生成的SQL它表明NHibernate的莫名其妙切换值：

  INSERT INTO ITEMDELIVERYDETAIL 
（ITEMDELIVERYDETAIL_ID，数量，PROCESSED_BY_REM，SINGLE_ITEM_PRICE，
 ITEMDELIVERY_ID，PARTITIONDATE，SupplierInvoice_id）
值（hibernate_sequence .nextval，：P0，：P1，：P2，
：P3，：P4，：P5）
返回ITEMDELIVERYDETAIL_ID到：nhIdOutParam; 
 
：P0 = 20.12.2011 16时29分44秒[类型：双（0）]，
：P1 = 6类型：DATETIME（0）]，
： P2 = 21.12.2011 16点29分44秒[类型：双（0）]，
：P3 = 7 [类型：的Int32（0）]，
：P4 = 0类型：DATETIME（0 ）]，
：P5 = 19.12.2011 16时29分44秒[类型：的Int32（0）]，
：nhIdOutParam = 27638398 [类型：的Int32（0）] 
  

正如你所看到的，参数是一塌糊涂......结果
他们应该是这样的：

 ：P0 = 6类型：双人间（0）]，
：P1 = 21.12.2011 16时29分： 44 [类型：日期时间（0）]，
：P2 = 7 [类型：双（0）]，
：P3 = 0类型：的Int32（0）]，
：P4 = 19.12.2011 16点29分44秒[类型：日期时间（0）]，
：P5 = 27638398 [类型：的Int32（0）]，
：nhIdOutParam = NULL [类型：的Int32（0） ] 
  

解决方案

我解决了这个问题。这样做的原因奇怪的现象是，我有一个明确的财产 PartitionDate 也被映射（ mapping.Map（X => x.PartitionDate） .Column（PARTITIONDATE）; ）结果
这基本上意味着 PARTITIONDATE 列被映射两次

I am trying to map a table that has a composite key and map another table that references this table.

Assume these tables:

1. ITEMDELIVERY with relevant columns:
   1. ITEMDELIVERY_ID
   2. DELIVERY_DATE

2. ITEMDELIVERYDETAIL with relevant columns:
   1. ITEMDELIVERYDETAIL_ID
   2. ITEMDELIVERY_ID
   3. PARTITIONDATE

The columns ITEMDELIVERY.ITEMDELIVERY_ID and ITEMDELIVERY.DELIVERY_DATE together form the PK.
The columns ITEMDELIVERYDETAIL.ITEMDELIVERY_ID and ITEMDELIVERYDETAIL.PARTITIONDATE form the FK from ITEMDELIVERYDETAIL to ITEMDELIVERY.

How do I map this?

I tried the following:

IAutoMappingOverride<ItemDeliveryDetail>:

mapping.References(x => x.ItemDelivery)
       .Columns("ITEMDELIVERY_ID", "PARTITIONDATE");

IAutoMappingOverride<ItemDelivery>:

mapping.CompositeId().KeyProperty(x => x.Id, "ITEMDELIVERY_ID")
                     .KeyProperty(x => x.DeliveryDate, "DELIVERY_DATE");

But this doesn't work, it results in a System.InvalidCastException: Invalid cast from 'DateTime' to 'Double'. when calling SaveOrUpdate on the session.

UPDATE:

I just checked the generated SQL and it shows that NHibernate somehow switches the values:

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)]

As you can see, the parameters are a complete mess...
They should be like this:

: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)]

解决方案

I solved the problem. The reason for this strange behavior was that I had an explicit property PartitionDate that also was mapped (mapping.Map(x => x.PartitionDate).Column("PARTITIONDATE");).
This basically meant that the PARTITIONDATE column was mapped twice.

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