Calculate Entity Persistent Property

Author: AnghelLeonard

HibernateSpringBootCalculatePropertyGenerated/src/main/java/com/bookstore/entity/Book.java

@@ -24,7 +24,7 @@ public class Book implements Serializable {
 
     @Generated(value = GenerationTime.ALWAYS)
     @Column(insertable = false, updatable = false /*, columnDefinition = "double AS (price - price * 0.25)"*/)
-    private double discount;
+    private double discounted;
 
     public Long getId() {
         return id;
@@ -58,13 +58,13 @@ public void setPrice(double price) {
         this.price = price;
     }
 
-    public double getDiscount() {
-        return discount;
+    public double getDiscounted() {
+        return discounted;
     }
 
     @Override
     public String toString() {
         return "Book{" + "id=" + id + ", title=" + title + ", isbn="
-                + isbn + ", price=" + price + ", discount=" + discount + '}';
+                + isbn + ", price=" + price + ", discounted=" + discounted + '}';
     }
 }

HibernateSpringBootCalculatePropertyGenerated/src/main/java/com/bookstore/service/BookstoreService.java

@@ -27,7 +27,7 @@ public void insertBook() {
 
         bookRepository.save(book);
 
-        System.out.println("Discount after insert: " + book.getDiscount());
+        System.out.println("Discounted price after insert: " + book.getDiscounted());
     }
 
     @Transactional
@@ -37,6 +37,6 @@ public void updateBook() {
 
         bookRepository.flush();
 
-        System.out.println("Discount after update: " + book.getDiscount());
+        System.out.println("Discounted price after update: " + book.getDiscounted());
     }
 }

HibernateSpringBootCalculatePropertyGenerated/src/main/resources/application.properties

@@ -7,7 +7,7 @@ spring.datasource.password=root
 
 spring.jpa.show-sql=true
 
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
 
 spring.jpa.open-in-view=false
 

HibernateSpringBootCalculatePropertyGenerated/src/main/resources/schema-mysql.sql

@@ -4,7 +4,7 @@ DROP TABLE IF EXISTS bookstoredb.book;
 -- Create
 CREATE TABLE book (
   id BIGINT NOT NULL AUTO_INCREMENT,
-  discount DOUBLE GENERATED ALWAYS AS ((`price` - (`price` * 0.25))) STORED,
+  discounted DOUBLE GENERATED ALWAYS AS ((`price` - `price` * 0.25)) STORED,
   isbn VARCHAR(255),
   price DOUBLE PRECISION NOT NULL,
   title VARCHAR(255),