implementing polymorphism when inserting into various different types of tables

src/main/java/com/safeqr/app/qrcode/entity/QRCodeEntity.java

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+
+package com.safeqr.app.qrcode.entity;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.hibernate.annotations.UuidGenerator;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+@Table(name = "qr_code", schema = "safeqr")
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class QRCodeEntity {
+
+    @Id
+    @GeneratedValue(generator = "UUID")
+    @UuidGenerator
+    @Column(updatable = false, nullable = false)
+    private UUID id;
+
+    @JsonIgnore
+    @Column(name = "qr_code_type_id", nullable = false)
+    private Long qrCodeTypeId;
+
+    @JsonIgnore
+    private String userId;
+    private String contents;
+
+    @Column(name = "created_at", insertable = false, updatable = false)
+    private LocalDateTime createdAt;
+}