Re: PB Tutorial: Query By Criteria on Object

[Pulat Yunusov]

Your "template" likely refers to an instance with the default value for 
the primary key field, which is 0, and there is no record with PK equal 
to zero in your database.

Pulat
Annapoorani Rathi wrote:
Hi,
 
I just started on OJB..
 
In PB Tutorial, the code snippet does not fetch me the record and result is null (though the record is present in DB)
 
 broker = PersistenceBrokerFactory.defaultPersistenceBroker();
 QueryByCriteria query = new QueryByCriteria(template);
 result = (Product)broker.getObjectByQuery(query);
 
But if i replace the above with the code below, i do get a populated result object

 broker = PersistenceBrokerFactory.defaultPersistenceBroker();
 Criteria criteria = new Criteria();
 criteria.addEqualTo("name","Sprocket");
 QueryByCriteria query = new QueryByCriteria(Product.class, criteria);
 result = (Product)broker.getObjectByQuery(query);
 
I understand that the first Impl decodes to Second internally.
But then the first Impl does not work.

Can anyone help me to reason out?? 
 
Thanks
Anna

 

 


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