source: src/main/java/mk/ukim/finki/wp/db/entity/Course.java

package mk.ukim.finki.wp.db.entity;

import jakarta.persistence.*;
import lombok.*;
import mk.ukim.finki.wp.db.entity.user.Instructor;

import java.math.BigDecimal;
import java.util.HashSet;
import java.util.Set;

@Entity
@Table(name = "course")
@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Course {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "course_id")
    private Integer courseId;

    @Column(nullable = false, length = 150)
    private String name;

    @Column(precision = 10, scale = 2)
    private BigDecimal price;

    @Column(length = 30)
    private String status;

    @ManyToOne(optional = false)
    @JoinColumn(name = "instructor_id")
    private Instructor instructor;

    @ManyToMany
    @JoinTable(
            name = "course_category",
            joinColumns = @JoinColumn(name = "course_id"),
            inverseJoinColumns = @JoinColumn(name = "category_id")
    )
    private Set<Category> categories = new HashSet<>();
}