[英]Hibernate not inserting row in join table used in @onetomany bi-directional relationship.
我有两个波霍学生和一个科。 关系是,一节有很多学生。 (双向)
@Entity
@Table(name="section")
public class Section {
@Id
@GeneratedValue
private int sectionId;
private String sectionName;
private int maxStudent;
@OneToMany(cascade=CascadeType.PERSIST)
@JoinTable(name="student_section" , inverseJoinColumns={@JoinColumn(name="student_id")},joinColumns={@JoinColumn(name="section_id")})
private Set<Student> student = new HashSet<Student>(0);
public Set<Student> getStudent() {
return student;
}
public void setStudent(Set<Student> student) {
this.student = student;
}
和
@Entity
@Table(name="student")
public class Student {
@Id
@GeneratedValue
private int studentId;
private String studentName;
private int studentAge;
@OneToOne(cascade=CascadeType.PERSIST)
@JoinTable(name="student_section" , joinColumns={@JoinColumn(name="student_id")},inverseJoinColumns={@JoinColumn(name="section_id")})
private Section section;
学生表和节表正在填充,但联接表“ student_section”未在填充。 请提供解决方案。 提前致谢。
您能否尝试以下映射:
@OneToMany(cascade=CascadeType.PERSIST)
@JoinTable(name="student_section" , inverseJoinColumns={@JoinColumn(name="student_id")},joinColumns={@JoinColumn(name="section_id")})
private Set<Student> student
在节课中,在学生课中:
@ManytoOne(cascade=CascadeType.ALL)
private Section section;
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