"code line 44"

pom.xml

@@ -50,13 +50,21 @@
 	    <artifactId>thymeleaf-layout-dialect</artifactId>
 	    
 	</dependency>
-	<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
+	<!-- https://mvnrepository.com/artifact/postgresql/postgresql -->
 	<dependency>
-	    <groupId>mysql</groupId>
+		<groupId>org.postgresql</groupId>
-	    <artifactId>mysql-connector-java</artifactId>
+		<artifactId>postgresql</artifactId>
+		<scope>runtime</scope>
 	</dependency>
-	
+		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
-	<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+			<version>8.0.20</version>
+		</dependency>
+
+
+		<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
 	<dependency>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-data-jpa</artifactId>

src/main/java/com/chantha/springdemo/model/Food.java

@@ -1,14 +1,13 @@
 package com.chantha.springdemo.model;
 
-import javax.persistence.Entity;
+import javax.persistence.*;
-import javax.persistence.Id;
-import javax.persistence.Table;
 
 @Entity
 @Table(name="tbfood")
 public class Food {
 
 	@Id
+	@GeneratedValue(strategy = GenerationType.AUTO)
 	private long id;
 	public Food() {
 		super();

src/main/resources/application.properties

@@ -1,7 +1,7 @@
 spring.thymeleaf.cache=false
 spring.jpa.hibernate.ddl-auto=update
-spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3309/dbfood?createDatabaseIfNotExist=true&allowPublicKeyRetrieval=true&useSSL=false
+spring.datasource.url=jdbc:mysql://localhost:3309/dbfood?createDatabaseIfNotExist=true&allowPublicKeyRetrieval=true&useSSL=false
 spring.datasource.username=root
 spring.datasource.password=root
 spring.jpa.open-in-view=true
-server.servlet.session.tracking-modes=cookie
+server.port=8181

src/main/resources/templates/admin/admin.html

@@ -38,7 +38,7 @@
                                 <div class="modal-body">
                                     <form class="user" id="frmProductAdd" th:action="@{/admin/product/add}" th:object="${product}" enctype="multipart/form-data"  method="POST">
                                         <div class="form-group">
-                                            <input type="text" class="form-control" id="name" name="name" placeholder="Product..." required pattern="[A-Za-z]">
+                                            <input type="text" class="form-control" id="name" name="name" placeholder="Product..." required >
                                         </div>
                                         <div class="form-group">
                                             <input type="text" class="form-control" id="price" name="price" placeholder="Price"  required pattern="[0-9]+(\.[0-9]{1,2})?%?">