Added a basic first index with header fragment, and configured the project for mysql.

pom.xml

@@ -69,10 +69,16 @@
 			<scope>test</scope>
 		</dependency>
 
+		<!-- Database Drivers -->
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+			<version>8.0.15</version>
+		</dependency>
 	</dependencies>
 
 	<build>

src/main/java/nl/andrewlalis/teaching_assistant_assistant/TeachingAssistantAssistantApplication.java

@@ -1,13 +1,29 @@
 package nl.andrewlalis.teaching_assistant_assistant;
 
+import nl.andrewlalis.teaching_assistant_assistant.model.Course;
+import nl.andrewlalis.teaching_assistant_assistant.model.repositories.CourseRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.data.repository.CrudRepository;
 
 @SpringBootApplication
-public class TeachingAssistantAssistantApplication {
+public class TeachingAssistantAssistantApplication implements CommandLineRunner {
+
+	@Autowired
+	CourseRepository courseRepository;
 
 	public static void main(String[] args) {
 		SpringApplication.run(TeachingAssistantAssistantApplication.class, args);
 	}
 
+	@Override
+	public void run(String... args) throws Exception {
+		System.out.println("Running startup...");
+		courseRepository.save(new Course("Intro to Information Systems", "INF-1"));
+		courseRepository.save(new Course("Program Correctness", "PC-002"));
+		System.out.println("Saved two courses.");
+		System.out.println("Course count: " + courseRepository.count());
+	}
 }

src/main/java/nl/andrewlalis/teaching_assistant_assistant/config/DataSourceConfig.java

@@ -0,0 +1,34 @@
+package nl.andrewlalis.teaching_assistant_assistant.config;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+import javax.sql.DataSource;
+
+/**
+ * Configures the data source for this application.
+ */
+@Configuration
+public class DataSourceConfig {
+
+    private static final String USERNAME = "root";
+    private static final String PASSWORD = "root";
+    private static final String DB_HOST = "localhost";
+    private static final String DB_NAME = "teaching_assistant_assistant";
+
+    @ConfigurationProperties(prefix = "spring.datasource")
+    @Bean
+    @Primary
+    public DataSource getDataSource() {
+        return DataSourceBuilder
+                .create()
+                .url("jdbc:mysql://" + DB_HOST + '/' + DB_NAME)
+                .username(USERNAME)
+                .password(PASSWORD)
+                .build();
+    }
+
+}

src/main/java/nl/andrewlalis/teaching_assistant_assistant/controllers/RootController.java

@@ -0,0 +1,20 @@
+package nl.andrewlalis.teaching_assistant_assistant.controllers;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+public class RootController {
+
+    @RequestMapping(
+            path = "/",
+            produces = "text/html"
+    )
+    public String index(Model model) {
+        model.addAttribute("name", "JOHN");
+        return "index.html";
+    }
+
+}

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/BasicEntity.java

@@ -10,10 +10,12 @@ import java.util.Date;
  * in this system should extend from BasicEntity.
  */
 @MappedSuperclass
-public class BasicEntity {
+public abstract class BasicEntity {
 
     @Id
-    @GeneratedValue
+    @GeneratedValue(
+            strategy = GenerationType.IDENTITY
+    )
     private Long id;
 
     @Temporal(

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/Course.java

@@ -1,9 +1,11 @@
 package nl.andrewlalis.teaching_assistant_assistant.model;
 
-import javax.persistence.Column;
+import nl.andrewlalis.teaching_assistant_assistant.model.assignments.Assignment;
-import javax.persistence.Entity;
+import nl.andrewlalis.teaching_assistant_assistant.model.people.Student;
-import javax.persistence.Inheritance;
+import nl.andrewlalis.teaching_assistant_assistant.model.people.TeachingAssistant;
-import javax.persistence.InheritanceType;
+
+import javax.persistence.*;
+import java.util.List;
 
 /**
  * Represents a course, containing many students and teaching assistants, as well as a collection of assignments.
@@ -14,15 +16,64 @@ import javax.persistence.InheritanceType;
 )
 public class Course extends BasicEntity {
 
+    /**
+     * The human-readable name for this course.
+     */
     @Column(unique = true, nullable = false)
     private String name;
 
+    /**
+     * The unique identifying code for this course.
+     */
     @Column(unique = true, nullable = false)
     private String code;
 
+    /**
+     * The list of students participating in this course. This is a many-to-many relationship because a course can
+     * contain multiple students, and a student can participate in multiple courses at once.
+     */
+    @ManyToMany
+    @JoinTable(
+            name = "course_student",
+            joinColumns = @JoinColumn(name = "course_id"),
+            inverseJoinColumns = @JoinColumn(name = "student_id")
+    )
+    private List<Student> students;
+
+    /**
+     * The list of teaching assistants managing this course. Just like for students, this is a many-to-many relation.
+     */
+    @ManyToMany
+    @JoinTable(
+            name = "course_teachingAssistant",
+            joinColumns = @JoinColumn(name = "course_id"),
+            inverseJoinColumns = @JoinColumn(name = "teachingAssistant_id")
+    )
+    private List<TeachingAssistant> teachingAssistants;
+
+    /**
+     * The list of assignments this course contains.
+     */
+    @OneToMany(
+            fetch = FetchType.LAZY,
+            orphanRemoval = true
+    )
+    @JoinColumn(name = "course_id")
+    private List<Assignment> assignments;
+
     /**
      * Default constructor for JPA.
      */
     protected Course() {}
 
+    /**
+     * Constructs a new Course object.
+     * @param name The name of the course.
+     * @param code The course's unique code.
+     */
+    public Course(String name, String code) {
+        this.name = name;
+        this.code = code;
+    }
+
 }

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/assignments/Assignment.java

@@ -31,6 +31,7 @@ public class Assignment extends BasicEntity {
             fetch = FetchType.EAGER,
             orphanRemoval = true
     )
+    @JoinColumn(name = "assignment_id")
     private List<AssignmentSection> sections;
 
 

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/people/Person.java

@@ -11,7 +11,7 @@ import javax.persistence.*;
 @Inheritance(
         strategy = InheritanceType.JOINED
 )
-public class Person extends BasicEntity {
+public abstract class Person extends BasicEntity {
 
     @Column(nullable = false)
     private String firstName;

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/people/Student.java

@@ -8,4 +8,10 @@ import javax.persistence.Entity;
 @Entity
 public class Student extends Person {
 
+
+
+    public Student(String firstName, String lastName, String emailAddress) {
+        super(firstName, lastName, emailAddress);
+    }
+
 }

src/main/java/nl/andrewlalis/teaching_assistant_assistant/model/repositories/CourseRepository.java

@@ -0,0 +1,12 @@
+package nl.andrewlalis.teaching_assistant_assistant.model.repositories;
+
+import nl.andrewlalis.teaching_assistant_assistant.model.Course;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * The repository used to interact with various Course objects.
+ */
+@Repository
+public interface CourseRepository extends CrudRepository<Course, Long> {
+}

src/main/resources/application.properties

@@ -1 +1 @@
-
+spring.jpa.hibernate.ddl-auto=create-drop

src/main/resources/templates/fragments/header.html

@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+
+<nav th:fragment="header">
+    <ul>
+        <li>
+            <a href="#" th:href="@{/}">Home</a>
+        </li>
+        <li>
+            <a href="#" th:href="@{/courses}">Courses</a>
+        </li>
+        <li>
+            <a href="#" th:href="@{/students}">Students</a>
+        </li>
+    </ul>
+</nav>
+
+</body>
+</html>

src/main/resources/templates/index.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+
+<div th:replace="~{fragments/header :: header}">&nbsp;</div>
+
+<div>
+    <p>
+        Welcome to the home page.
+    </p>
+</div>
+
+</body>
+</html>