I am a beginner to JPA.
I have a postgreSQL database with relations having a primary key of type "serial", ie an autogenerated sequence of integers that the database takes care of.
Now in the entity class when i specify id, i get error when i try to run it second time as the unique constraint of this primary key is violated.
However, if i avoid primary key then i do not get any errors since the db automatically inserts it.
My question is:
How can I tell my JPA class that the PK is autogenerated and does not need a value from class while inserting into the db?
###### code #####
@Entity
@Table (name="test_person")
static public class Person implements java.io.Serializable
{
@Id
/*THIS IS THE PK THAT I WANT TO LET THE JPA AUTOGENERATE TO THE DB*/
private long id;
private String lastName;
private String firstName;
protected Person() {}
public Person(String lastName, String firstName)
{
this.lastName = lastName;
this.firstName = firstName;
}
public String getLastName() { return lastName; }
public void setLastName(String lastName) { this.lastName = lastName; }
}
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