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 Post subject: Subclass und many-to-one
PostPosted: Sat Jul 16, 2011 3:16 am 

Joined: Sat Jul 16, 2011 2:32 am
Posts: 1

Ich hab zwei Klassen, welche über eine many-to-one-Beziehung verbunden sind.
Das sieht folgendermaßen aus:
<composite-id class="MActiveId" mapped="true">
            <key-property name="actorType" type="string">
                <column name="ACTOR_TYPE" length="16" />
            <key-property name="actorId" type="java.lang.Long">
                <column name="ACTOR_ID" precision="22" scale="0" />
        <discriminator column="ACTOR_TYPE" length="16" type="string" />
        <property column="ACTIVE_START" name="activeStart" type="timestamp"/>
        <property column="ACTIVE_END" name="activeEnd" type="timestamp"/>
        <subclass discriminator-value="MET" name="MeterActive">
            <many-to-one name="actor" class="TfmsMeters" foreign-key="ACTOR_ID" column="ACTOR_ID" />


<class name="TfmsMeters" schema="tfms" table="TFMS_METERS">
    <id name="id" type="java.lang.Long">
      <column name="ID" precision="22" scale="0"/>
      <generator class="assigned"/>
    <one-to-one cascade="all" class="MeterActive" fetch="select" name="meterActive" property-ref="actor" />
    <many-to-one class="TfmsPresets" column="PRESET_ID" name="preset">
    <property name="armNo" type="java.lang.Long">
      <column name="ARM_NO" not-null="true" precision="22" scale="0"/>
    <property name="name" type="string">
      <column length="250" name="NAME"/>
    <property name="CUser" type="string">
      <column length="64" name="C_USER"/>

Ausgelesen kann alles werden, jedoch bekomm ich beim Einfügen eines neuen Objektes vom Typ TfmsMeters dauernd folgenden Fehler:
org.hibernate.exception.GenericJDBCException: could not insert: [PresetActive]
Caused by: java.sql.SQLException: Ungültiger Spaltenindex

Danke schon Mal :)

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