OpenIsle/backend/src/main/java/com/openisle/model/MessageParticipant.java

package com.openisle.model;

import com.fasterxml.jackson.annotation.JsonBackReference;
import jakarta.persistence.*;
import java.time.LocalDateTime;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Entity
@Getter
@Setter
@NoArgsConstructor
@Table(name = "message_participants")
public class MessageParticipant {

  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;

  @ManyToOne(optional = false, fetch = FetchType.LAZY)
  @JoinColumn(name = "conversation_id")
  @JsonBackReference
  private MessageConversation conversation;

  @ManyToOne(optional = false, fetch = FetchType.LAZY)
  @JoinColumn(name = "user_id")
  private User user;

  @Column
  private LocalDateTime lastReadAt;
}