Inbox Message & bugs

src/main/java/com/yaoyuan/jiscuss/entity/Message.java

@@ -0,0 +1,40 @@
+package com.yaoyuan.jiscuss.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.Date;
+
+@Data
+@Entity
+@Table(name = "message")
+public class Message implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    @Column(name = "sender_id", nullable = false)
+    private Integer senderId;
+
+    @Column(name = "receiver_id", nullable = false)
+    private Integer receiverId;
+
+    @Column(name = "content", columnDefinition = "TEXT", nullable = false)
+    private String content;
+
+    @Column(name = "is_read")
+    private Boolean isRead = false;
+
+    @Column(name = "create_time")
+    private Date createTime;
+
+    /**
+     * Conversation identifier = "min(a,b)_max(a,b)", groups all messages
+     * between two users into a single conversation thread.
+     */
+    @Column(name = "conversation_id", nullable = false)
+    private String conversationId;
+}