OneToMany fetch lazy not working with spring boot + JPA - spring-data-jpa

Question

I have two entities. Student and department.One department has many student. I have specified fetch type lazy. still when I am trying to fetch only department entity it is showing student data as well.
#Entity(name = "tbl_department")
public class DepartmentEntity implements Serializable {
private static final long serialVersionUID = 1560990434803170482L;
#Id
#GeneratedValue
private Integer id;
#NotNull(message = "Department name can not be null")
private String departmentName;
#OneToMany(cascade = CascadeType.ALL, mappedBy = "department", fetch = FetchType.LAZY)
private Set<StudentEntity> studentList;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDepartmentName() {
return departmentName;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
public Set<StudentEntity> getStudentList() {
return studentList;
}
public void setStudentList(Set<StudentEntity> studentList) {
this.studentList = studentList;
}
#Entity(name = "tbl_student")
public class StudentEntity implements Serializable {
/**
*
*/
private static final long serialVersionUID = 2969421115938100526L;
#Id
#GeneratedValue
private Integer id;
#NotNull(message = "First Name Can not null")
private String firstName;
#NotNull(message = "Last Name Can not null")
private String lastName;
#NotNull(message = "Date Of Birth Can not null")
private Date dateOfBirth;
private Integer age;
#NotNull(message = "Address Can not null")
private String address;
#JsonIgnore
#ManyToOne(cascade = CascadeType.ALL)
private DepartmentEntity department;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Date getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(Date dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public DepartmentEntity getDepartment() {
return department;
}
public void setDepartment(DepartmentEntity department) {
this.department = department;
}
So when I am trying to fetch department entity using departmentRepo it shows all students mapped to that department even if I specified fetch type lazy

Answer 1

Can you declare your entities as below and try once
Student Entity:
#OrderBy("id ASC")
#ManyToOne(fetch=FetchType.LAZY)
#JoinColumn(name="departmentid")
#JsonIgnore
private Department department;
Department Entity:
#OrderBy("id ASC")
#OneToMany(fetch=FetchType.LAZY, mappedBy="department")
private Set<Student> students = new LinkedHashSet<Student>(0);