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POWhy can't I reference child entities with part of the parent entities composite key
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  1. POWhy can't I reference child entities with part of the parent entities composite key
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    copied!<p>I am trying to reference some child entities with part of the parents composite key not all of it, why cant I? This happens when I use the following mapping instead of that which is commented. </p> <p>I get the following error</p> <blockquote> <p>Foreign key in table VolatileEventContent must have same number of columns as referenced primary key in table LocationSearchView</p> </blockquote> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"&gt; &lt;class name="LocationSearchView" table="LocationSearchView"&gt; &lt;composite-id&gt; &lt;key-property name="LocationId" type="Int32"&gt;&lt;/key-property&gt; &lt;key-property name="ContentProviderId" type="Int32"&gt;&lt;/key-property&gt; &lt;key-property name="CategoryId" type="Int32"&gt;&lt;/key-property&gt; &lt;/composite-id&gt; &lt;property name="CompanyName" type="String" not-null="true" update="false" insert="false"/&gt; &lt;property name="Description" type="String" not-null="true" update="false" insert="false"/&gt; &lt;property name="CategoryId" type="Int32" not-null="true" update="false" insert="false"/&gt; &lt;property name="ContentProviderId" type="Int32" not-null="true" update="false" insert="false"/&gt; &lt;property name="LocationId" type="Int32" not-null="true" update="false" insert="false"/&gt; &lt;property name="Latitude" type="Double" update="false" insert="false" /&gt; &lt;property name="Longitude" type="Double" update="false" insert="false" /&gt; &lt;bag name="Events" table="VolatileEventContent" where="DeactivatedOn IS NULL" order-by="StartDate DESC" lazy="false" cascade="none"&gt; &lt;key&gt; &lt;column name="LocationId"&gt;&lt;/column&gt; &lt;column name="ContentProviderId"&gt;&lt;/column&gt; &lt;!--&lt;column name="LocationId"&gt;&lt;/column&gt; &lt;column name="ContentProviderId"&gt;&lt;/column&gt; &lt;column name="CategoryId"&gt;&lt;/column&gt;--&gt; &lt;/key&gt; &lt;one-to-many class="Event" column="VolatileEventContentId"&gt;&lt;/one-to-many&gt; &lt;/bag&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>And VolatileEventContent mapping file</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain"&gt; &lt;class name="Event" table="VolatileEventContent" select-before-update="false" optimistic-lock="none"&gt; &lt;composite-id&gt; &lt;key-property name="LocationId" type="Int32"&gt;&lt;/key-property&gt; &lt;key-property name="ContentProviderId" type="Int32"&gt;&lt;/key-property&gt; &lt;/composite-id&gt; &lt;property name="Description" type="String" not-null="true" update="false" insert="false"/&gt; &lt;property name="StartDate" type="DateTime" not-null="true" update="false" insert="false" /&gt; &lt;property name="EndDate" type="DateTime" not-null="true" update="false" insert="false" /&gt; &lt;property name="CreatedOn" type="DateTime" not-null="true" update="false" insert="false" /&gt; &lt;property name="ModifiedOn" type="DateTime" not-null="false" update="false" insert="false" /&gt; &lt;many-to-one name="Location" class="Location" column="LocationId" /&gt; &lt;bag name="Artistes" table="EventArtiste" lazy="false" cascade="none"&gt; &lt;key name="VolatileEventContentId" /&gt; &lt;many-to-many class="Artiste" column="ArtisteId" &gt;&lt;/many-to-many&gt; &lt;/bag&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre>
 

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