Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Your classes should looks like this:<br> Human </p> <pre><code>import java.io.Serializable; import javax.persistence.Entity; import javax.persistence.EnumType; import javax.persistence.Enumerated; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Inheritance; import javax.persistence.InheritanceType; @Entity @Inheritance(strategy = InheritanceType.JOINED) public class Human implements Serializable { private static final long serialVersionUID = 1L; public static enum Gender { Male, Female } @Id @GeneratedValue private Long id; @Enumerated(EnumType.STRING) private Gender gender; private String firstName; private String lastName; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public Gender getGender() { return gender; } public void setGender(Gender gender) { this.gender = gender; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } ..... } </code></pre> <p>User</p> <pre><code>import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.PrimaryKeyJoinColumn; import javax.persistence.Temporal; import javax.persistence.TemporalType; @Entity @PrimaryKeyJoinColumn public class User extends Human { private static final long serialVersionUID = 1L; @Column @Temporal(TemporalType.DATE) private Date registrationDate; public Date getRegistrationDate() { return registrationDate; } public void setRegistrationDate(Date registrationDate) { this.registrationDate = registrationDate; } .... } </code></pre> <ul> <li>Human class should be annotated by @Entity annotation</li> <li>Model entity classes should implement Serializable interface</li> </ul> <p>See</p> <ol> <li><a href="http://blog.v-s-f.co.uk/2010/12/inheritance-type-with-hibernate/" rel="nofollow">Inheritance Type (With Hibernate)</a>.</li> <li><a href="http://www.java2s.com/Tutorial/Java/0355__JPA/InheritanceTypeJOINED.htm" rel="nofollow">Inheritance Type JOINED</a></li> </ol>
    singulars
    1. This table or related slice is empty.
    1. POJava hibernate Joined inheritence (id not found)
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMichał Ziober
    1. USMichał Ziober
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO1) annotated classes as marked above(removed all @ column annotations, added @ PrimaryKeyJoinColumn to table User); 2) added serialVersionUID to both classes and mark Human as 'implements Serializable'; 3) marked Human.id as @ GeneratedValue (AFAIK, it doesn't matter as far as i don't insert into table); 4) created field 'id' of type Integer in table User (as shown in suggested link), as PK; 5) all getters and setters allready existed, but wasn't mentioned in above code; BUT still have similar error(human1_1_.id not found)
      singulars
      1. PO
      1. USConstantine Kozlov
    2. COI have one more idea. Your's User table contains column with name "hid". Try change it name to "id".
      singulars
      1. PO
      1. USMichał Ziober
    3. COAlready tried and obtained same results. I edited original question to mark all changes made originally from your answer, as they made code simplier, but made no additional errors (on working classes without inheritance). Also, new database structure specified contains column `id` instead of `hid`, and I posted query,generated by Hibernate, and some comment to it.
      singulars
      1. PO
      1. USConstantine Kozlov
 

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