doc'd new mapping attributes, and cascade styles
git-svn-id: https://svn.jboss.org/repos/hibernate/trunk/Hibernate3/doc@5533 1b8cb986-b30d-0410-93ca-fae66ebed9b2
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Gavin King
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@ -136,7 +136,7 @@
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<programlisting><![CDATA[<hibernate-mapping
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schema="schemaName"
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catalog="catalogName"
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default-cascade="none|save-update"
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default-cascade="cascade_style"
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default-access="field|property|ClassName"
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default-lazy="true|false"
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auto-import="true|false"
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@ -1359,12 +1359,13 @@
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<area id="manytoone10" coords="11 60"/>
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<area id="manytoone11" coords="12 60"/>
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<area id="manytoone12" coords="13 60"/>
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<area id="manytoone13" coords="14 60"/>
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</areaspec>
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<programlisting><![CDATA[<many-to-one
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name="propertyName"
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column="column_name"
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class="ClassName"
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cascade="all|none|save-update|delete"
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cascade="cascade_style"
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fetch="join|select"
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update="true|false"
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insert="true|false"
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@ -1373,6 +1374,7 @@
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unique="true|false"
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not-null="true|false"
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optimistic-lock="true|false"
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lazy="true|false"
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/>]]></programlisting>
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<calloutlist>
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<callout arearefs="manytoone1">
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@ -1448,18 +1450,30 @@
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property is dirty.
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</para>
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</callout>
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<callout arearefs="manytoone13">
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<para>
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<literal>lazy</literal> (optional - defaults to <literal>false</literal>): Specifies
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that this property should be fetched lazily when the instance variable is first
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accessed (requires build-time bytecode instrumentation).
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</para>
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</callout>
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</calloutlist>
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</programlistingco>
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<para>
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Setting a value of the <literal>cascade</literal> attribute to not
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<literal>none</literal> will propagate certain operations to the
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associated object (usually in a parent/child fashion). See
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"Lifecycle Objects" discussed later.
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Setting a value of the <literal>cascade</literal> attribute to any meaningful
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value other than <literal>none</literal> will propagate certain operations to the
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associated object. The meaningful values are the names of Hibernate's basic
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operations, <literal>create, merge, delete, save-update, evict, replicate, lock,
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refresh</literal>, as well as the special values <literal>delete-orphan</literal>
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and <literal>all</literal> and comma-separated combinations of operation
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names, for example, <literal>cascade="create,merge,evict"</literal> or
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<literal>cascade="all,delete-orphan"</literal>. See "Lifecycle Objects" for a full
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explanation.
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</para>
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<para>
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A typical <literal>many-to-one</literal> declaration looks as simple as
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A typical <literal>many-to-one</literal> declaration looks as simple as this:
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</para>
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<programlisting><![CDATA[<many-to-one name="product" class="Product" column="PRODUCT_ID"/>]]></programlisting>
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@ -1513,7 +1527,7 @@
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<programlisting><![CDATA[<one-to-one
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name="propertyName"
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class="ClassName"
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cascade="all|none|save-update|delete"
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cascade="cascade_style"
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constrained="true|false"
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fetch="join|select"
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property-ref="propertyNameFromAssociatedClass"
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@ -2099,11 +2113,15 @@
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<area id="key1" coords="2 50"/>
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<area id="key2" coords="3 50"/>
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<area id="key3" coords="4 50"/>
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<area id="key4" coords="5 50"/>
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<area id="key5" coords="6 50"/>
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</areaspec>
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<programlisting><![CDATA[<key
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column="columnname"
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on-delete="noaction|cascade"
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property-ref="propertyName"
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not-null="true|false"
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update="true|false"
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/>]]></programlisting>
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<calloutlist>
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@ -2128,6 +2146,20 @@
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legacy data.)
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</para>
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</callout>
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<callout arearefs="key4">
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<para>
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<literal>not-null</literal> (optional): Specifies that the foreign key columns
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are not nullable (this is implied whenever the foreign key is also part of the
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primary key).
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</para>
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</callout>
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<callout arearefs="key5">
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<para>
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<literal>update</literal> (optional): Specifies that the foreign key should never
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be updated (this is implied whenever the foreign key is also part of the primary
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key).
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</para>
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</callout>
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</calloutlist>
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</programlistingco>
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@ -2138,6 +2170,13 @@
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<literal>DELETE</literal> statements. Be aware that this feature bypasses Hibernate's
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usual optimistic locking strategy for versioned data.
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</para>
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<para>
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The <literal>not-null</literal> and <literal>update</literal> attributes are useful when
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mapping a unidirectional one to many association. If you map a unidirectional one to many
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to a non-nullable foreign key, you <emphasis>must</emphasis> declare the key column using
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<literal><key not-null="true"></literal>.
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</para>
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</sect2>
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@ -2520,7 +2559,7 @@
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name="propertyName"
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id-type="idtypename"
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meta-type="metatypename"
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cascade="none|all|save-update"
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cascade="cascade_style"
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access="field|property|ClassName"
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optimistic-lock="true|false"
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>
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