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Re: [eclipselink-users] Embeddables, association-override and cascade-merge
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I am not sure I understand what you are doing. It is not clear to me where your
transactions begin and end and where data gets sent to the DB. Can you provide
some JPA-style pseudo code.
On 28/02/2012 12:24 PM, sr_dd wrote:
Hi,
i tried some more things with the information:
* the curreny-Object is an existing entity loaded from db.
* the creation of a new entity with a money-field works fine, when i hang in
a Money-Object(the embeddable) with an existing currency-Object
* the saved entity is reloaded, transaction closed, em cleared.
* now i have the detached entity and another detached Currency loaded from
db, out of the currency i create a new Money-Object(my embeddable) with the
currency in it
* now updating the detached entity with setting the other money-Object
* new transaction + em.merge + flush brings me to an insert for currency.
this ends up in a db-Exception (integrity-constraint, because the id already
exists).
to the second question: props of persistence-unit
<properties>
<property name="eclipselink.weaving.changetracking" value="false" />
<property name="eclipselink.weaving" value="static" />
<property name="eclipselink.weaving.lazy" value="true" />
<property name="eclipselink.session.customizer"
value="sharedkernel.base.eclipselink.SessionCustomizer" />
<property name="eclipselink.allow-zero-id" value="true" />
<property name="eclipselink.cache.shared.default" value="false" />
</properties>
my properties
tware wrote:
If you are getting an insert for currency, cascading is likely working.
The
issue seems to be that, for some reason, we do not know the Currency
object you
have created already exists.
To what degree does the Currency object actually exist? Does the insert
result
in a SQLException due to it's existence?
How is your persistence unit defined? Are you using any persistence unit
properties related to caching or querying?
-Tom
On 28/02/2012 9:55 AM, sr_dd wrote:
Hello,
following problem:
i have defined an embeddable with mapping:
<orm:embeddable class="Money">
<orm:attributes>
<orm:basic name="amount"/>
<orm:many-to-one name="currency" fetch="LAZY">
<orm:join-column column-definition="decimal" name="ID_CURRENCY"
referenced-column-name="ID"/>
<orm:cascade>
<orm:cascade-merge />
</orm:cascade>
</orm:many-to-one>
</orm:attributes>
</orm:embeddable>
</orm:entity-mappings>
Currency is specified as follows:
<orm:entity class="Currency">
<orm:table name="SYSP.CURRENCY"/>
<orm:attributes>
<orm:id name="id">
<orm:column name="ID"/>
</orm:id>
<orm:basic name="name">
<orm:column name="NAME" nullable="false"/>
</orm:basic>
...
</orm:attributes>
</orm:entity>
in another mapping i use the embeddable:
<orm:embedded name="airfreightRisk">
<orm:attribute-override name="amount">
<orm:column name="AIRFREIGHTRISK" nullable="true" />
</orm:attribute-override>
<orm:association-override name="currency">
<orm:join-column name="ID_CURRENCY_AIRFREIGHTRISK"
nullable="true"
referenced-column-name="ID" />
<orm:cascade>
<orm:cascade-merge />
</orm:cascade>
</orm:association-override>
</orm:embedded>
In my CLF Test i create a new Entity and set the Attribute airfreightRisk
with a Money-Object which carries a loaded and already persisted
Currency-Object.
Trying to persist the new Entity brings me to the following problem:
* everything works fine staying attached.
* building the Object-Tree with detached Objects and merge the whole tree
results in an insert for currency
--> the cascade-merge in embeddables seems not to work?!
Any ideas?
Stefan
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