Concluida alteração para o banco de dados MySQL.

Author: DouglasEleuterio

pom.xml

@@ -1,43 +1,42 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-
-	<groupId>com.example</groupId>
-	<artifactId>postgres-demo</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
-	<packaging>jar</packaging>
-
-	<name>postgres-demo</name>
-	<description>Demo project for Spring Boot</description>
-
-	<parent>
-		<groupId>org.springframework.boot</groupId>
-		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.1.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
-	</parent>
-
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>1.8</java.version>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-data-jpa</artifactId>
-		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
-		</dependency>
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.example</groupId>
+    <artifactId>postgres-demo</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>postgres-demo</name>
+    <description>Demo project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.2.1.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
 
 		<dependency>
-			<groupId>org.postgresql</groupId>
-			<artifactId>postgresql</artifactId>
-			<scope>runtime</scope>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -46,14 +45,14 @@
 		</dependency>
 	</dependencies>
 
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.springframework.boot</groupId>
-				<artifactId>spring-boot-maven-plugin</artifactId>
-			</plugin>
-		</plugins>
-	</build>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
 
 
 </project>

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

@@ -5,17 +5,17 @@
 import org.hibernate.annotations.OnDeleteAction;
 
 import javax.persistence.*;
+import java.io.Serializable;
 
 @Entity
 @Table(name = "answers")
-public class Answer extends AuditModel {
+public class Answer extends AuditModel implements Serializable {
+
+    private static final long servialVersionUID = 1L;
+
     @Id
-    @GeneratedValue(generator = "answer_generator")
-    @SequenceGenerator(
-            name = "answer_generator",
-            sequenceName = "answer_sequence",
-            initialValue = 1000
-    )
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+
     private Long id;
 
     @Column(columnDefinition = "text")

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

@@ -3,17 +3,15 @@
 import javax.persistence.*;
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.Size;
+import java.io.Serializable;
 
 @Entity
 @Table(name = "questions")
-public class Question extends AuditModel {
+public class Question extends AuditModel implements Serializable {
+    private static final long servialVersionUID = 1L;
+
     @Id
-    @GeneratedValue(generator = "question_generator")
-    @SequenceGenerator(
-            name = "question_generator",
-            sequenceName = "question_sequence",
-            initialValue = 1000
-    )
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
     @NotBlank