kotlin spring practice

authentication.kt

package com.example.auth.models

import java.util.*
import javax.persistence.*

@Entity
@Table(name = "authentications")
data class Authentication(
    @get:Id
    @get:GeneratedValue(strategy = GenerationType.IDENTITY)
    @get:Column(name = "id")
    var id: Long? = null,

    @get:Column(name = "provider")
    var provider: String,

    @get:ManyToOne(fetch = FetchType.EAGER, optional = false)
    @get:JoinColumn(name = "user_id")
    var user: User,

    @get:OneToOne(fetch = FetchType.LAZY, mappedBy = "authentication")
    var kakaoIdentity: KakaoIdentity,

    // datetime 은 어떻게 쓰는지 모르겠어서 일단 적어만둔다.
    @get:Column(name = "created_at")
    var createdAt: Date
) {}