>> At this point hibernate first tries to save the child
record <<
No, cascades to collections happen *after*. ie. the child
will be saved after the parent.
Anyway, The sequence of steps *should* be
>1) I create an new parent class
>2) I create a new child class
>3) I add the child record to the parent class's set
new) set the child's parent property to point to the parent
>4) I save the parent record
And, secondly, you *must* map the set with readonly="true".
There are lots of examples of this stuff in the .test
package.
"Matt Dowell"
<[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>
Sent by: cc:
[EMAIL PROTECTED] Subject: [Hibernate] More - Saving
Collections.
eforge.net
31/01/03 01:58 AM
I have made progress saving my collections (thanks to Gavin), and I am
down to my last bug, I think. Here is what is happening:
1) I create an new parent class
2) I create a new child class
3) I add the child record to the parent class's set
4) I save the parent record
At this point hibernate first tries to save the child record, but it
does not yet get the sequence for the parent record so it tries to
insert NULL into the key column for the parent record and the DB is
throwing a SQL error. Any ideas?
Here are my mapping files:
PARENT
------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD
1.1//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-1.1.dtd";>
<hibernate-mapping>
<class name="com.notiva.entity.submatch.SubMatch" table="SUB_MATCH">
<id name="id" type="java.lang.Long" unsaved-value="null">
<column name="SUB_MATCH_ID" />
<generator class="sequence">
<param>SEQ_SUB_MATCH_ID</param>
</generator>
</id>
<property column="MATCH_ID" length="10" name="matchId"
not-null="true" type="java.lang.Long"/>
<property column="MATCH_LEVEL_ID" length="10"
name="matchLevelId" not-null="true" type="java.lang.Long"/>
<property column="REASON_CODE_ID" length="10"
name="reasonCodeId" type="java.lang.Long"/>
<property column="VARIANCE_AMT" length="18" name="varianceAmt"
not-null="true" type="java.lang.Double"/>
<property column="DISPUTE_AMT" length="18" name="disputeAmt"
type="java.lang.Double"/>
<property column="ADJUSTMENT_DESC_TXT" length="100"
name="adjustmentDescTxt" type="java.lang.String"/>
<set role="invoices" table="SUB_MATCH_INVOICE" readonly="false"
cascade="all">
<key column="SUB_MATCH_ID" />
<one-to-many
class="com.notiva.entity.submatch.SubMatchInvoice"/>
</set>
</class>
</hibernate-mapping>
CHILD
---------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD
1.1//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-1.1.dtd";>
<hibernate-mapping>
<class name="com.notiva.entity.submatch.SubMatchInvoice"
table="SUB_MATCH_INVOICE">
<id name="id" type="java.lang.Long" unsaved-value="null">
<column name="SUB_MATCH_INVOICE_ID"/>
<generator class="sequence">
<param>SEQ_INVOICE_ID</param>
</generator>
</id>
<property column="INVOICE_ID" length="10" name="invoiceId"
not-null="true" type="java.lang.Long"/>
<property column="CREATE_TS" length="11" name="createTs"
not-null="true" type="timestamp"/>
<property column="CREATE_USER_TXT" length="40"
name="createUserTxt" not-null="true" type="java.lang.String"/>
<many-to-one name="subMatchId" column="SUB_MATCH_ID"
class="com.notiva.entity.submatch.SubMatch"
cascade="all" unique="true" not-null="true"
outer-join="true" />
</class>
</hibernate-mapping>
Thanks,
Matt Dowell
Notiva Corp
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