Servus,
i'm looking for several hours in the hibernate documentation and this forum to find a way selecting my object twice.
I select a document through a webinterface and edit its values.
After submitting the page I want to check if there are empty values and if so replace them with the values from the document stored in the database.
While selecting the object hibernate performs an update.
Is there an option to disable this automatic dirty checking for this object?
simple code explanation
Code:
//select the document
doc = docmgr.getDocument(1);
// website edit a value (the fileData to an empty string)
doc.setFileData("");
...
// now select the original doc from db
// on this point hibernate performs the update!
// and my fileData is also ""
doc2 = docmgr.getDocument(1);
Thanks for helping
Hibernate version: hibernate 3.2.2
Name and version of the database you are using:MySQL 5.0.26
Mapping documents:Code:
<hibernate-mapping>
<class name="model.Document" table="Document" catalog="tubedata">
<comment></comment>
<id name="documentId" type="int">
<column name="documentId" />
<generator class="increment" />
</id>
<property name="fileName" type="string">
<column name="fileName" not-null="true">
<comment></comment>
</column>
</property>
<property name="fileData" type="binary">
<column name="fileData" not-null="true">
<comment></comment>
</column>
</property>
</class>
</hibernate-mapping>
Code:
public Document getDocument(int docId) {
Document doc = null;
Session session = HibernateUtil.getSession();
session.beginTransaction();
try {
Criteria crit = session.createCriteria(Document.class);
crit.add(Expression.eq("documentId", docId));
doc = (Document)crit.uniqueResult();
session.getTransaction().commit();
} catch (HibernateException e) {
session.getTransaction().rollback();
throw e;
}
return doc;
}
Debug level Hibernate log excerpt: INFO [btpool0-2] (DocumentEditController.java:48) - ********************************************START********************************************
DEBUG [btpool0-2] (JDBCTransaction.java:54) - begin
DEBUG [btpool0-2] (ConnectionManager.java:419) - opening JDBC connection
DEBUG [btpool0-2] (JDBCTransaction.java:59) - current autocommit status: false
DEBUG [btpool0-2] (AbstractBatcher.java:358) - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
DEBUG [btpool0-2] (AbstractBatcher.java:393) - update tubedata.Document set fileName=?, fileData=? where documentId=?
Hibernate: update tubedata.Document set fileName=?, fileData=? where documentId=?
DEBUG [btpool0-2] (BatchingBatcher.java:44) - Executing batch size: 1
DEBUG [btpool0-2] (AbstractBatcher.java:366) - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
DEBUG [btpool0-2] (AbstractBatcher.java:358) - about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
DEBUG [btpool0-2] (AbstractBatcher.java:393) - select this_.documentId as documentId5_0_, this_.fileName as fileName5_0_, this_.fileData as fileData5_0_ from tubedata.Document this_ where this_.documentId=?
Hibernate: select this_.documentId as documentId5_0_, this_.fileName as fileName5_0_, this_.fileData as fileData5_0_ from tubedata.Document this_ where this_.documentId=?
DEBUG [btpool0-2] (AbstractBatcher.java:374) - about to open ResultSet (open ResultSets: 0, globally: 0)
DEBUG [btpool0-2] (AbstractBatcher.java:381) - about to close ResultSet (open ResultSets: 1, globally: 1)
DEBUG [btpool0-2] (AbstractBatcher.java:366) - about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
DEBUG [btpool0-2] (JDBCTransaction.java:103) - commit
DEBUG [btpool0-2] (JDBCTransaction.java:116) - committed JDBC Connection
DEBUG [btpool0-2] (ConnectionManager.java:402) - aggressively releasing JDBC connection
DEBUG [btpool0-2] (ConnectionManager.java:439) - releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)]
INFO [btpool0-2] (DocumentEditController.java:50) - ********************************************END********************************************
[/code]
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