I am using spring boot data jpa with SQLServer and spatial dialect as below:
spring.jpa.properties.hibernate.dialect=org.hibernate.spatial.dialect.sqlserver.SqlServer2008SpatialDialect
Parent Class:
#Entity
#Table(name = "users", schema = "dbo")
public class User {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
#ManyToMany(cascade = {CascadeType.ALL}, fetch = FetchType.EAGER)
#JoinTable(name = "users_roles",
joinColumns = #JoinColumn(name = "user_id", referencedColumnName = "id"),
inverseJoinColumns = #JoinColumn(name = "role_id", referencedColumnName = "id"))
private Collection<Role> roles = new ArrayList<>();
}
Child Class:
#Entity
#Table(name = "roles", schema = "dbo")
public class Role {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
#ManyToMany(mappedBy="roles", cascade = {CascadeType.ALL})
private Collection<User> users = new ArrayList<>();
}
on saving user:
u.setRoles(roles);
userRepository.save(u);
but alyways get user_id equals zero on table users_roles
please help
Note that SpatialDialect is needed to manage spatial data on other entities.
Related
I have 3 entity classes with relations as below:
class SocietyData {
#OneToMany(mappedBy = "societyData")
private List<SubsectionData> subsectionDataList = new ArrayList<>();
}
class SubsectionData {
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "society_id", nullable = false)
private SocietyData societyData;
#OneToMany(mappedBy = "subsectionData")
private List<BasementData> basementDataList = new ArrayList<>();
}
class BasementData {
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "subsection_id", nullable = false)
private SubsectionData subsectionData;
}
I am trying to fetch society data information by using entity graph:
#Repository
public interface SocietyRepo extends JpaRepository<SocietyData, Long> {
#EntityGraph(attributePaths = {"subsectionDataList", "subsectionDataList.basementDataList"})
Optional<SocietyData> findById(long id);
}
I am not getting proper society data object and getting cant parse json exception after taking so long time sometimes!
How to solve this?
Thanks in Advance.
I have no problem with saving my entities to the database. However when I try to insert values into my 3rd many-to-many table, it simply doesn't do anything.
Here is my student entity;
#Table(name = "student", schema = "school")
public class Student {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long studentId;
#Column(name = "name")
private String name;
#Column(name = "surname")
private String surname;
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinTable(name = "student_classroom", schema = "school")
private Collection<Classroom> classroom = new ArrayList<>();
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST)
#JoinTable(name = "student_teacher",
joinColumns = {
#JoinColumn(name = "student_id", referencedColumnName = "studentId",
nullable = false, updatable = false)},
inverseJoinColumns = {
#JoinColumn(name = "teacher_id", referencedColumnName = "teacherId",
nullable = false, updatable = false)})
private Set<Teacher> teachers = new HashSet<>();
The teacher entity.
#Entity
#Table(name = "teacher", schema = "school")
public class Teacher {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long teacherId;
#Column(name = "name")
private String name;
#Column(name = "surname")
private String surname;
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinTable(name = "teacher_classroom", schema = "school")
private Collection<Classroom> classroom = new ArrayList<>();
#ManyToMany(mappedBy = "teachers", fetch = FetchType.LAZY)
private Set<Student> students = new HashSet<>();
Here is my service method.
public void addTeacherToStudent(long teacherId, long studentId) {
Optional<Teacher> teacher = teacherRepository.findById(teacherId);
Optional<Student> student = studentRepository.findById(studentId);
student.get().getTeachers().add(teacher.get());
teacher.get().getStudents().add(student.get());
}
It has no problem saving the teachers and students in the sets in memory, however it doesn't reach the database. I have tried every annotation, didn't work.
Try adding this in Teacher entity
#ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
#JoinTable(
name = "student_teacher",
joinColumns = #JoinColumn(name = "teacher_id"),
inverseJoinColumns = #JoinColumn(name = "student_id")
)
private Set<Student> students = new HashSet<>();
I recently upgraded from hibernate-core 4.1.7 to 5.0.9 and Have problem with this code:
#ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH})
#JoinColumn(name = "FK_AAA", foreignKey = #ForeignKey(name = "CS_BBB"))
#org.hibernate.annotations.Index(name = "IDX_CCC", columnNames = "FK_DDD")
private ImportData importData;
This generate correct foreign columns pointing to the defining class, but also generating a column on the same class:
IMPORTDATA RAW(255)
Why is this raw(255) column generated ? I think it was not generated with Hibernate-core 4.1.7
any idea ?
Update 1: here is longer code fragments:
#MappedSuperclass
#Access(AccessType.PROPERTY)
public abstract class BaseEntity {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
public abstract Long getId();
}
#Entity
#Table(name = "IMPORT_DATA", uniqueConstraints = {
#UniqueConstraint(name = "UC_IMP_BID", columnNames = {"BUSINESS_ID"})
}, indexes = {
#Index(name = "IDX_IMP_DGXML_ID", columnList = "FK_DGXML_ID"),
#Index(name = "IDX_IMP_IMPXML_ID", columnList = "FK_IMPXML_ID")
})
public class ImportData extends BaseEntity {
#Id #GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() { return id; }
// ...
}
#Entity(name = "MUTATION")
#Table(name = "MUTATION")
#Inheritance(strategy = InheritanceType.SINGLE_TABLE)
#DiscriminatorColumn(name = "TYPE", discriminatorType = DiscriminatorType.STRING)
#SequenceGenerator(name = "mutationsSeq", sequenceName = "MUTATIONS_SEQUENCE", allocationSize = 1)
public abstract class Mutation extends BaseEntity {
#Id
#GeneratedValue(strategy = GenerationType.AUTO, generator = "mutationsSeq")
private Long id;
#ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH})
#JoinColumn(name = "FK_IMP_ID", foreignKey = #ForeignKey(name = "CS_MUT_IMP_ID"))
#org.hibernate.annotations.Index(name = "IDX_MUT_IMP_ID", columnNames = "FK_IMP_ID")
protected ImportData importData;
}
#Entity(name="XXX")
#DiscriminatorValue("XXX_DISC")
public class XXX extends Mutation {
// ...
}
I found an answer on Mapping composite key with Hibernate produces a raw field in Oracle:
I was mixing annotations on fields and methods. I also had #Id on an abstract superclass, and a redefinition on a derived class.
Fixing theses two elements, cleaning DB and regenerating in "create" ddl mode proved that the fix was no longer generating RAW field type.
Thanks for all your helps!
I'm designing a student enrollment database
Student-Table
student_id (pk)
//other attributes
Course-Table
course_id (pk)
//other attributes
Student_course-Table
student_course_id(pk)
course_id (fk)
student_id (fk)
Lectrue-Table
lecture_id(pk)
student_course_id(fk - > student_course table)
// other attributes
Basically I want to store which student is enrolled to which course and has attend how many lectures for that particular course.
Q1 ) Is this design correct? Should I use primary key of Bridge table as foreign key in another table.
Q2 ) I did manyToMany mapping between student <-> course and oneToMany between student_course <-> lecture and got the following error :
org.hibernate.MappingException: Foreign key must have same number of columns as the referenced primary key
Any idea how to proceed?
//UPDATE Entity class
#Entity
#Table(name = "STUDENT")
public class Student implements Serializable {
#Id
#Column(name = "STUDENT_ID")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#ManyToMany(mappedBy = "students" ,cascade = CascadeType.ALL)
#MapKey(name = "courseName")
private Map<String, Course> courses;
}
#Entity
#Table(name = "COURSE", uniqueConstraints = #UniqueConstraint(columnNames = {"COURSE_NAME"}))
public class Course implements Serializable {
#Id
#Column(name = "COURSE_ID")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(name = "STUDENT_COURSE", joinColumns = {
#JoinColumn(name = "COURSE_ID") }, inverseJoinColumns = {
#JoinColumn(name = "STUDENT_ID") })
private Set<Student> students;
#Column(name = "COURSE_NAME")
private String courseName;
}
#Entity
#Table(name = "LECTURE")
public class Lecture {
#Id
#Column(name = "LECTURE_ID")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#ManyToOne(cascade = CascadeType.ALL)
#JoinColumn(name = "STUDENT_COURSE_ID")
private StudentCourse studentCourse;
}
#Entity
#Table(name = "STUDENT_COURSE")
public class StudentCourse {
#Id
#Column(name = "STUDENT_COURSE_ID")
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "STUDENT_ID")
private Long studentId;
#Column(name = "COURSE_ID")
private Long courseId;
#OneToMany(mappedBy = "studentCourse")
private Set<Lecture> lectures = new HashSet<Lecture>();
}
I have a problem with saving entity with references to database using
Spring MVC and AngularJS.
My entities:
Entity
#Table(name = "comment")
public class Comment {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name = "id", nullable = false)
private Long id;
#Column(name = "creation_date", nullable = false)
private Date creationDate;
#Column(name = "comment", nullable = false)
private String comment;
#ManyToOne
#JoinColumn(name = "article", nullable = false)
private Article article;
#ManyToOne
#JoinColumn(name = "user", nullable = false)
private User user;
}
#Entity
#Table(name = "article")
public class Article {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "id", nullable = false)
private Long id;
#ManyToOne
#JoinColumn(name="user", nullable=false)
private User user;
...
}
How can I save new Article but at the same time add new entity to Comment table?
How can two updates be performed in one transaction?
How sholud I connect request from angular with controller, and how sholud they look?
Angular:
$http({
url : ..../new,
method : POST,
data : ?
})
#RestController
#RequestMapping(value = "/new", method = RequestMethod.POST)
public Article addArticle(#RequestBody Article article, ?) {
article.setId(null);
return articleService.save(article);
//but how to save comment?
}
Thank You!