Added @onDelete Cascade to child entity

Author: Rajeev Kumar Singh

src/main/java/com/example/postgresdemo/model/Answer.java

@@ -1,6 +1,9 @@
 package com.example.postgresdemo.model;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+
 import javax.persistence.*;
 
 @Entity
@@ -20,6 +23,7 @@ public class Answer extends AuditModel {
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "question_id", nullable = false)
+    @OnDelete(action = OnDeleteAction.CASCADE)
     @JsonIgnore
     private Question question;