映射具有多級子類的類NHibernate

我試圖使用NHibernate映射多個級別的子類，我必須承認我是一個新手。我正在映射的數據是網絡數據包捕獲。基本上，我希望能夠在數據庫中的表格上拆分對象的不同繼承級別，例如，當我收到TCP數據包時，像時間戳這樣的一般數據存儲在'數據包'表，更具體的數據存儲在其各自的表中，例如， 'IP'表中的IP頭和'TCP'表中的TCP頭。映射具有多級子類的類NHibernate

我映射

<?xml version="1.0" encoding="utf-8" ?> 
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"> 
    <class name="WindowsFormsApplication1.BasePacket, WindowsFormsApplication1" table="Packets" lazy="false"> 

    <id name="ID" column="ID"> 
     <generator class="identity" /> 
    </id> 

    <property name="timeStamp" column="timeStamp" type="datetime"></property> 

    <joined-subclass table="IP" name="WindowsFormsApplication1.IP, WindowsFormsApplication1" lazy="false"> 
     <key column="IPID"/> 

     <property name="identification" column="identification" type="UInt16"></property> 
     <property name="sourceIP" column="sourceIP" type="BinaryBlob" ></property> 
     <property name="destinationIP" column="destinationIP" type="BinaryBlob"></property> 
     <property name="version" column="version" type="int"></property> 
     <property name="IPHeaderLength" column="IPHeaderLength" type="byte"></property> 
     <property name="sizeOfDatagram" column="sizeOfDatagram" type="UInt16"></property> 
     <property name="reserved" column="reserved" type="bool"></property> 
     <property name="dontFragment" column="dontFragment" type="bool"></property> 
     <property name="moreFragments" column="moreFragments" type="bool"></property> 
     <property name="fragmentOffset" column="fragmentOffset" type="UInt16"></property> 
     <property name="timeToLive" column="timeToLive" type="byte"></property> 
     <property name="protocol" column="protocol" type="int"></property> 
     <property name="headerChecksum" column="headerChecksum" type="UInt16"></property> 
     <property name="additionalData" column="additionalData" type="BinaryBlob"></property> 

     <joined-subclass table="TCP" name="WindowsFormsApplication1.TCP, WindowsFormsApplication1" lazy="false"> 
     <key column="TCPID"/> 

     <property name="sourcePort" column="sourcePort" type="UInt16"></property> 
     <property name="destinationPort" column="destinationPort" type="UInt16"></property> 
     <property name="ISN" column="ISN" type="long"></property> 
     <property name="ASN" column="ASN" type="long"></property> 
     <property name="innerProtocolHeaderLength" column="innerProtocolHeaderLength" type="byte"></property> 
     <property name="FIN" column="FIN" type="bool"></property> 
     <property name="SYN" column="SYN" type="bool"></property> 
     <property name="RST" column="RST" type="bool"></property> 
     <property name="PSH" column="PSH" type="bool"></property> 
     <property name="ACK" column="ACK" type="bool"></property> 
     <property name="URG" column="URG" type="bool"></property> 
     <property name="windowSize" column="windowSize" type="UInt16"></property> 
     <property name="checksum" column="checksum" type="UInt16"></property> 
     <property name="urgentPointer" column="urgentPointer" type="UInt16"></property> 
     <property name="options" column="options" type="BinaryBlob"></property> 
     <property name="payload" column="payload" type="BinaryBlob"></property> 
     <property name="anomalies" column="anomalies" type="string"></property> 
     </joined-subclass> 

     <joined-subclass table="UDP" name="WindowsFormsApplication1.UDP, WindowsFormsApplication1" lazy="false"> 
     <key column="UDPID"/> 

     <property name="sourcePort" column="sourcePort" type="UInt16"></property> 
     <property name="destinationPort" column="destinationPort" type="UInt16"></property> 
     <property name="length" column="length" type="UInt16"></property> 
     <property name="checksum" column="checksum" type="UInt16"></property> 
     <property name="payload" column="payload" type="BinaryBlob"></property> 
     </joined-subclass> 

     <joined-subclass table="ICMP" name="WindowsFormsApplication1.ICMP, WindowsFormsApplication1" lazy="false"> 
     <key column="ICMPID"/> 

     <property name="type" column="type" type="byte"></property> 
     <property name="code" column="code" type="byte"></property> 
     <property name="checksum" column="checksum" type="UInt16"></property> 
     <property name="additionalDataICMP" column="additionalDataICMP" type="BinaryBlob"></property> 
     </joined-subclass> 
    </joined-subclass> 
    </class> 
</hibernate-mapping>

當我嘗試使用這個映射我收到此錯誤信息，或一個類似指的是不同的子類來運行我的程序。

*型 'NHibernate.Exceptions.GenericADOException' 未處理的異常發生在NHibernate.dll

其他信息：無法插入：[WindowsFormsApplication1.UDP] [SQL：INSERT INTO包（時間戳）VALUES（？）; SELECT LAST_INSERT_ID（）] *

我確信這只是我對NHibernate的理解不夠，並且非常感謝您的幫助。

來源

2012-05-02 Superfrannio

顯示完整的堆棧跟蹤。這很可能是映射錯誤，數據庫抱怨某些列未知 – Firo

您的標識列（ID）是否在數據庫中實際定義爲自動增量/標識？

您的時間戳是數據庫時間戳列嗎？如果是你需要訪問=「只讀」，因爲nhibernate試圖插入它。

此外，您的第一個加入的子類丟失或似乎是在最後一個ICMP表後的錯誤位置..除非我錯過了你的意圖，你想他們嵌套。

來源

2012-05-25 02:59:27 HeatherD

映射具有多級子類的類NHibernate

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