The Author Online Book Forums are Moving

The Author Online Book Forums will soon redirect to Manning's liveBook and liveVideo. All book forum content will migrate to liveBook's discussion forum and all video forum content will migrate to liveVideo. Log in to liveBook or liveVideo with your Manning credentials to join the discussion!

Thank you for your engagement in the AoF over the years! We look forward to offering you a more enhanced forum experience.

elly (1) [Avatar] Offline
I've got a PatientPlan table with a many-to-one relationship with a Patient table, thus:

<many-to-one >
<column name="patient_id" />

As such, a Patient object is contained within the PatientPlan POJO.

To get rows for a given patient with a Criteria query, and desiring to use DetachedCriteria to pass to a method that has access to the Session object, I find I have to code like this:

DetachedCriteria planCriteria = DetachedCriteria.forClass(PatientPlan.class)
.add(Restrictions.eq("patientId", patient.getId()));
But this leads to an unnecessary join of the two tables:
select... from patient_plans this_ inner join patients patient1_ on this_.patient_id=patient1_.patient_id...

The join only hurts--I'd rather have a query that goes "where this_patient_id='<value>'".

.add(Restrictions.eq("patientId", patient.getId()))
leads to
org.hibernate.QueryException: could not resolve property: patientId of: PatientPlan.

Similar results ensue from using:
.add(Restrictions.eq("patient.patientId", patient.getId()))

What's the proper way to use an object from a contained POJO class in a Criterion in a Criteria query? Can this join be avoided?