diff --git a/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Course.java b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Course.java
new file mode 100644
index 0000000000..4849165c57
--- /dev/null
+++ b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Course.java
@@ -0,0 +1,67 @@
+package com.baeldung.manytomany.extracolumn.model;
+
+import java.util.Set;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+
+@Entity
+public class Course {
+
+    @Id
+    private Long id;
+
+    @ManyToMany(mappedBy = "likedCourses")
+    private Set<Student> likes;
+
+    @OneToMany(mappedBy = "course")
+    private Set<CourseRating> ratings;
+
+    @OneToMany(mappedBy = "course")
+    private Set<CourseRegistration> registrations;
+
+    // additional properties
+
+    public Course() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Set<CourseRating> getRatings() {
+        return ratings;
+    }
+
+    public Set<CourseRegistration> getRegistrations() {
+        return registrations;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Course other = (Course) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}
diff --git a/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRating.java b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRating.java
new file mode 100644
index 0000000000..1b6c9d8b2c
--- /dev/null
+++ b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRating.java
@@ -0,0 +1,75 @@
+package com.baeldung.manytomany.extracolumn.model;
+
+import javax.persistence.EmbeddedId;
+import javax.persistence.Entity;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.MapsId;
+
+@Entity
+public class CourseRating {
+
+    @EmbeddedId
+    private CourseRatingKey id;
+
+    @ManyToOne
+    @MapsId("student_id")
+    @JoinColumn(name = "student_id")
+    private Student student;
+
+    @ManyToOne
+    @MapsId("course_id")
+    @JoinColumn(name = "course_id")
+    private Course course;
+
+    private int rating;
+
+    public CourseRating() {
+    }
+
+    public int getRating() {
+        return rating;
+    }
+
+    public void setRating(int rating) {
+        this.rating = rating;
+    }
+
+    public CourseRatingKey getId() {
+        return id;
+    }
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRating other = (CourseRating) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}
diff --git a/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRatingKey.java b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRatingKey.java
new file mode 100644
index 0000000000..6638ae6968
--- /dev/null
+++ b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRatingKey.java
@@ -0,0 +1,59 @@
+package com.baeldung.manytomany.extracolumn.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class CourseRatingKey implements Serializable {
+
+    @Column(name = "student_id")
+    private Long studentId;
+
+    @Column(name = "course_id")
+    private Long courseId;
+
+    public CourseRatingKey() {
+    }
+
+    public Long getStudentId() {
+        return studentId;
+    }
+
+    public Long getCourseId() {
+        return courseId;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((courseId == null) ? 0 : courseId.hashCode());
+        result = prime * result + ((studentId == null) ? 0 : studentId.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRatingKey other = (CourseRatingKey) obj;
+        if (courseId == null) {
+            if (other.courseId != null)
+                return false;
+        } else if (!courseId.equals(other.courseId))
+            return false;
+        if (studentId == null) {
+            if (other.studentId != null)
+                return false;
+        } else if (!studentId.equals(other.studentId))
+            return false;
+        return true;
+    }
+
+}
diff --git a/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRegistration.java b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRegistration.java
new file mode 100644
index 0000000000..225968dba4
--- /dev/null
+++ b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/CourseRegistration.java
@@ -0,0 +1,94 @@
+package com.baeldung.manytomany.extracolumn.model;
+
+import java.time.LocalDateTime;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+
+@Entity
+public class CourseRegistration {
+
+    @Id
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "student_id")
+    private Student student;
+
+    @ManyToOne
+    @JoinColumn(name = "course_id")
+    private Course course;
+
+    private LocalDateTime registeredAt;
+
+    private int grade;
+
+    // additional properties
+
+    public CourseRegistration() {
+    }
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public void setStudent(Student student) {
+        this.student = student;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    public void setCourse(Course course) {
+        this.course = course;
+    }
+
+    public LocalDateTime getRegisteredAt() {
+        return registeredAt;
+    }
+
+    public void setRegisteredAt(LocalDateTime registeredAt) {
+        this.registeredAt = registeredAt;
+    }
+
+    public int getGrade() {
+        return grade;
+    }
+
+    public void setGrade(int grade) {
+        this.grade = grade;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRegistration other = (CourseRegistration) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}
diff --git a/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Student.java b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Student.java
new file mode 100644
index 0000000000..6bc8271e7e
--- /dev/null
+++ b/persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/extracolumn/model/Student.java
@@ -0,0 +1,74 @@
+package com.baeldung.manytomany.extracolumn.model;
+
+import java.util.Set;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+
+@Entity
+public class Student {
+
+    @Id
+    private Long id;
+
+    @ManyToMany
+    @JoinTable(name = "course_like", joinColumns = @JoinColumn(name = "student_id"), inverseJoinColumns = @JoinColumn(name = "course_id"))
+    private Set<Course> likedCourses;
+
+    @OneToMany(mappedBy = "student")
+    private Set<CourseRating> ratings;
+
+    @OneToMany(mappedBy = "student")
+    private Set<CourseRegistration> registrations;
+
+    // additional properties
+
+    public Student() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Set<Course> getLikedCourses() {
+        return likedCourses;
+    }
+
+    public Set<CourseRating> getRatings() {
+        return ratings;
+    }
+
+    public Set<CourseRegistration> getRegistrations() {
+        return registrations;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Student other = (Student) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}