Databases
StackOverflow2013
Postsdbo
POComplex Hibernate Projections
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POComplex Hibernate Projections
    primarykey
    data
    text
    <p>I want to ask, it is possible that I create query projections and criterion for more than one level deep? I have 2 model classes:</p> <pre><code>@Entity @Table(name = "person") public class Person implements Serializable { @Id @GeneratedValue private int personID; private double valueDouble; private int valueInt; private String name; @OneToOne(cascade = {CascadeType.ALL}, orphanRemoval = true) @JoinColumn(name="wifeId") private Wife wife; /* * Setter Getter */ } @Entity @Table(name = "wife") public class Wife implements Serializable { @Id @GeneratedValue @Column(name="wifeId") private int id; @Column(name="name") private String name; @Column(name="age") private int age; /* * Setter Getter */ } </code></pre> <p><strong>My Criteria API :</strong> </p> <pre><code>ProjectionList projections = Projections.projectionList(); projections.add(Projections.property("this.personID"), "personID"); projections.add(Projections.property("this.wife"), "wife"); projections.add(Projections.property("this.wife.name"), "wife.name"); Criteria criteria = null; criteria = getHandlerSession().createCriteria(Person.class); criteria.createCriteria("wife", "wife", JoinType.LEFT.ordinal()); criterion = Restrictions.eq("wife.age", 19); criteria.add(criterion); criteria.setProjection(projections); criteria.setResultTransformer(Transformers.aliasToBean(Person.class)); return criteria.list(); </code></pre> <p>and I hope, I can query Person, with specified criteria for wife property, and specified return resultSet. so i used Projections for getting specified return resultSet</p> <p>I want personID, name(Person), name(Wife) will returned. how API i must Use, i more prefer use Hibernate Criteria API.</p> <p>This time, I used code above for getting my expected result, but it will throw Exception with error message : <code>Exception in thread "main" org.hibernate.QueryException: could not resolve property: wife.name of: maladzan.model.Person</code>, and whether my <code>Restrictions.eq("wife.age", 19);</code> is correct for getting person which has wife with 19 as her age value ?</p> <p>Thanks</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USTom11
    1. USFauzi Achmad
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POComplex Hibernate Projections
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POComplex Hibernate Projections
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    3. VO
      singulars
      1. POComplex Hibernate Projections
      1. USesmoreno
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload