CODEWITHSUNDEEP
hibernatejpakotlin
yooouuri
yooouuri

Reputation: 2658

detached entity passed to persist Kotlin

When I try to persist an entity, the following error occur

org.hibernate.PersistentObjectException: detached entity passed to persist: xxxxxxx.xxxxxxxx.Invoice

My model

@Entity
@Table(name = "invoices")
class Invoice(
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        var id: Long = -1,
        var date: Date,
        @Column(name = "user_id", unique = true)
        var userId: Long,
        @Column(name = "invoice_number")
        var invoiceNumber: String) : Serializable {

    constructor(date: Date, userId: Long, invoiceNumber: String) : this(-1, date, userId, invoiceNumber)
}

Invoice object is created as followed

val invoice = Invoice(Date(), 11111, "abc123")

invoiceDao.create(invoice)

In my generic dao I persist

fun create(entity: T): T {
    entityManager.persist(entity)

    return entity
}

allopen and noarg is included in my build.gradle

Upvotes: 2

Views: 1244

Answers (1)

Sashi
Sashi

Reputation: 2415

You've defined the id field as auto generated but assigned it a default value. When hibernate tries to persist it, it thinks that the object represents an underlying row in database because it already has an id. So, it considers it a detached object. The persist() method doesn't work on a detached object. You can set the default value of id to null to resolve this issue.

Upvotes: 3

Related Questions