Hello all,
I've problems to handle 1:1 relationships, I want this association is
navigable on both sides, from person to passport and vice versa.
I'm working with OJB and Postgresql, how can i declare in the ojb
descriptor, in the schema this type of relationships, i try this way,
but i get the following error:
proxy.IndirectionHandler - Can not materialize object for Identity
org.apache.ojb.Person{25} - using PBKey org.apache.ojb.broker.PBKey:
jcdAlias=default, user=postgres, password=*****
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and to remove it shows:
java.lang.NullPointerException
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.doDelete(PersistenceBrokerImpl.java:608)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.deleteReferences(PersistenceBrokerImpl.java:803)
at
org.apache.ojb.broker.core.PersistenceBrokerImpl.performDeletion(PersistenceBrokerImpl.java:674)
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My schema.sql is thus:
CREATE TABLE Person
(
person_id INT NOT NULL PRIMARY KEY,
person_name VARCHAR(60),
)
CREATE TABLE Passport
(
person_id INT NOT NULL PRIMARY KEY,
passport_number VARCHAR(20),
foreign key(person_id) references Person(person_id) on update CASCADE
on delete CASCADE
)
In my ojb descriptor I have the following:
<class-descriptor class="org.apache.ojb.Passport" table="PASSPORT">
<field-descriptor name="personId" primarykey="true"
nullable="false" column="PERSON_ID" jdbc-type="INTEGER"/>
<field-descriptor name="passport_number" nullable="false"
default-fetch="true" column="PASSPORT_NUMBER" jdbc-type="VARCHAR"/>
<reference-descriptor name="personIdRef"
class-ref="org.apache.ojb.Person" auto-update="false"
auto-delete="false" proxy="true">
<foreignkey field-ref="personId"/>
</reference-descriptor>
</class-descriptor>
****************************************************************
<class-descriptor class="org.apache.ojb.Person" table="PERSON">
<field-descriptor name="personId" primarykey="true"
nullable="false" autoincrement="true"... column="PERSON_ID"
jdbc-type="INTEGER"/>
<field-descriptor name="personName" nullable="false"
default-fetch="true" column="PERSON_NAME" jdbc-type="VARCHAR"/>
<reference-descriptor name="personPassIdRef"
class-ref="org.apache.ojb.Passport" auto-update="true"
auto-delete="true" proxy="true">
<foreignkey field-ref="personId"/>
</reference-descriptor>
</class-descriptor>
Thanks in advanced.
--
Iris Soto
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