Hibernate duplicate entry

Question

I have Registration table.That has many duplicate entries. Here duplicate entries in terms of same username. so I want to know how to prevent the duplicate entries in a table. I am using Hibernate and java servlet.

make the username column unique in your schema. There is nothing to do with hibernate. And handle the unique name exception in your code. — Sivaranjani D
– Sivaranjani D, Commented Mar 10, 2014 at 12:36

Adam Arold · Accepted Answer · 2014-03-10 12:34:55Z

1

You should create an unique constraint on the username.

@Entity
@Table(uniqueConstraints=
           @UniqueConstraint(columnNames = {"username"})) 
public class Registration {
    //...
}

answered Mar 10, 2014 at 12:34

Adam Arold

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Deepu--Java · Accepted Answer · 2014-03-10 12:36:43Z

1

@Column(name = "username",unique=true)

at column level.

answered Mar 10, 2014 at 12:36

Deepu--Java

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