Hi,

I'm using Hibernate 3.1

I have a problem with searching attriutes of components with the criteria API.

The class Annotation has a reference on the class Position. The class Position is mapped as a component of Annotation on the same table.

When I query like this:
Criteria lCrit = lSession.createCriteria(Annotation.class).createCriteria("position").add(Restrictions.like("x", "12"));

I get the following exception:
org.hibernate.QueryException: could not resolve property: x of: dms.Annotation

It seems like hibernate searches the attribute x in the class Annotation instead of Position.

Is there somewhere a mistake?

Thank you,

Jakob

here is the mapping:

<class name="dms.Annotation" table="ANNOTATION">
<id column="ID" name="id"/>
<discriminator column="ANNOTATION_TYPE" type="string"/>
<version column="VERSION" name="version"/>

<component class="dms.Position" name="position">
<property name="x">
<column name="X"/>
</property>
<property name="y">
<column name="Y"/>
</property>
</component>
</class>

I thought that would work too but try



also, make sure position is defined as an attribute of Annotation class

Hi,

I already tried this. It causes the same Exception: "could not resolve property: x of: dms.Annotation

I made sure, Position is an attribute of Annotation.

Any other ideas?

------------

Jakob

It must be something to do with that component class being defined in the class Annotation. I've never used component classes. I don't know what, but I know the two ways you tried should work.

sorry

Hi,

I found the solution accidentally.

When you query for an attribute of an component you have to write the attribute with a dot after the component.

So the correct query would look like:

session.createCriteria(Annotation.class).add(Restrictions.like("position.x", 12));

It's confusing, because I couldn't find this information nowhere.

Jakob