title: How do I resolve "Unable to resolve attribute [organizationType.id] against path" exception?
body: <p>I'm using Spring 3.1.1.RELEASE, Hibernate 4.1.0.Final, JUnit 4.8, and JPA 2.0 (hibernate-jpa-2.0-api).  I'm trying to write a query and search based on fields of member fields.  What I mean is I have this entity …</p>
  
  <pre><code>@GenericGenerator(name = "uuid-strategy", strategy = "uuid.hex")
  @Entity
  @Table(name = "cb_organization", uniqueConstraints = {@UniqueConstraint(columnNames={"organization_id"})})
  public class Organization implements Serializable
  {
  
      @Id
      @NotNull
      @GeneratedValue(generator = "uuid-strategy")
      @Column(name = "id")
      /* the database id of the Organization */
      private String id;
  
      @ManyToOne 
      @JoinColumn(name = "state_id", nullable = true, updatable = false)
      /* the State for the organization */
      private State state;
  
      @ManyToOne
      @JoinColumn(name = "country_id", nullable = false, updatable = false)
      /* The country the Organization is in */
      private Country country;
  
      @ManyToOne(optional = false) 
      @JoinColumn(name = "organization_type_id", nullable = false, updatable = false)
      /* The type of the Organization */
      private OrganizationType organizationType;
  </code></pre>
  
  <p>Notice the members "organizationType," "state," and "country," which are all objects.  I wish to build a query based on their id fields.  This code</p>
  
  <pre><code>@Override
  public List&lt;Organization&gt; findByOrgTypesCountryAndState(Set&lt;String&gt; organizationTypes,
                                                          String countryId,
                                                          String stateId)
  {
      CriteriaBuilder builder = entityManager.getCriteriaBuilder();
      CriteriaQuery&lt;Organization&gt; criteria = builder.createQuery(Organization.class);
      Root&lt;Organization&gt; org = criteria.from(Organization.class);
      criteria.select(org).where(builder.and(org.get("organizationType.id").in(organizationTypes),
                                              builder.equal(org.get("state.id"), stateId),
                                              builder.equal(org.get("country.id"), countryId)));
      return entityManager.createQuery(criteria).getResultList();
  }
  </code></pre>
  
  <p>is throwing the exception below.  How do I heal the pain?  </p>
  
  <pre><code>java.lang.IllegalArgumentException: Unable to resolve attribute [organizationType.id] against path
      at org.hibernate.ejb.criteria.path.AbstractPathImpl.unknownAttribute(AbstractPathImpl.java:116)
      at org.hibernate.ejb.criteria.path.AbstractPathImpl.locateAttribute(AbstractPathImpl.java:221)
      at org.hibernate.ejb.criteria.path.AbstractPathImpl.get(AbstractPathImpl.java:192)
      at org.mainco.subco.organization.repo.OrganizationDaoImpl.findByOrgTypesCountryAndState(OrganizationDaoImpl.java:248)
      at org.mainco.subco.organization.repo.OrganizationDaoTest.testFindByOrgTypesCountryAndState(OrganizationDaoTest.java:55)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:597)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  </code></pre>