Hi

Is it possible to define a non-persistent attribute as simple as

private String myname ?

in hbm.xml file ?

The field 'myname' do not correspond to any column in the database table.

Thanks
Ron

Hi,


I'm not sure to understand what you mean. If you don't want a class field to be persisted, just don't mention it in the mapping.

Did I miss somethng?

Erik

Hi

Thanks for replying.

Well, I can define a non-persistent field in POJO, however I am using Middlegen to create POJO at build time. Once I define that non-persistent field in POJO, I need to move it into what we call a passive generation area and I will lose active generation of POJO each time I do a build. So, I was wondering there must be some way in hbm.xml file to specify non-persistent field ?

Thanks
Ron

Hi,


Now I got it. The answer is yes. Set update and insert to false in your property - see Hibernate documentation http://www.hibernate.org/hib_docs/v3/re ... n-property

Erik

Hi

I am using Hibernate 2.1 and I defined property as you suggested:

<property name="userId" formula = "" type="java.lang.String" insert="false" update="false" >
<meta attribute="use-in-tostring">false</meta>
<meta attribute="use-in-equals">false</meta>
</property>

However still no luck ....

I see it is still getting included in Select clause when turn on Show Sql flag with following exception:

INFO: CORE3282: stdout: java.sql.SQLException: ORA-00904: "USER3_"."USERID": invalid identifier


Thanks
Ron

There should be a way in middlegen to keep the field from being generated in the hibernate mapping.