1 
@Entity
@Table(name = "t_payment")
data class PaymentEntity(
        @ManyToOne(cascade = CascadeType.DETACH)
        @JoinColumn(name = "user_id", nullable = false)
        var user: User? = null) : Serializable {
}

as a result of a compilation error: "Type mismatch"

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1 Answer 1

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7

cascade annotation attribute accepts an array of CascadeType thus you need to change your @ManyToOne usage to:

@ManyToOne(cascade = arrayOf(javax.persistence.CascadeType.DETACH))
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