I have two entities Employee and Address.
Employee.java
public class Employee {
private Long id;
private String firstName;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
}
Address.java
public class Address {
public Address(Long addressId, String address, Long id) {
this.addressId = addressId;
this.address = address;
this.id = id;
}
public Address() {
}
#Id
private Long addressId;
private Long employeeId;
private String address;
public Long getAddressId() {
return addressId;
}
public void setAddressId(Long addressId) {
this.addressId = addressId;
}
public Long getEmployeeId() {
return employeeId;
}
public void setEmployeeId(Long employeeId) {
this.employeeId= employeeId;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
Useing Javers api i want all the changes made by Employee including Address.
suppose employeeId e1 with name e made some change in address a1 with address xyz and employeeId e1
Changes changes = javers.findChanges(QueryBuilder.byInstanceId(id,com.mybatis.emo.bean.Employee.class).withNewObjectChanges(true).build());
I want address changes also comes while querying employee.
Related
I am trying to validate that if the email exists in my database, the error message will come out instead of the White Error Page.
I tried using this link but it is not working for me. Below are my codes.
Codes for Model Class
public class Employee {
#Id
#GeneratedValue (strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "first_name")
private String firstName;
#Column(name = "last_name")
private String lastName;
#Column(name = "email", unique = true)
#Email
private String email;
#Column(name = "posit")
private String position;
#Column(name = "mobile")
private String phone_num;
public Employee() {}
public Employee(String firstName, String lastName, String email, String position, String phone_num) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
this.phone_num = phone_num;
this.position = position;
}
public Long getId() {
return id;
}
public void setId(Long 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 String getPosition() {
return position;
}
public void setPosition(String position) {
this.position = position;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone_num() {
return phone_num;
}
public void setPhone_num(String phone_num) {
this.phone_num = phone_num;
}
}
Codes for EmployeeServiceInterface
public interface EmployeeService {
Employee save(Employee employee);
}
Codes for EmployeeServiceImplementation
#Service
public class EmployeeServiceImpl implements EmployeeService{
#Autowired
private EmployeeRepository employeeRepository;
#Override
public Employee save(Employee employee) {
this.employeeRepository.save(employee);
return employee;
}
public boolean exist(String email){
return employeeRepository.existsByEmail(email);
}
Controller
#Controller
public class EmployeeRegistrationController {
#Autowired
private EmployeeService employeeService;
private EmployeeServiceImpl employeeImpl;
#PostMapping("/saveEmployee")
public String saveEmployee(#ModelAttribute("employee") Employee employee) {
// save employee to database
employeeService.save(employee);
if(employeeService.exist==true){
return "User already exist";
}
return "success";
}
}
I want to connect Spring Boot with neo4j database, however, it returns an error like that. It says that the connection has been terminated. The error is as follow:
org.neo4j.driver.v1.exceptions.ServiceUnavailableException: Connection to the database terminated.
This is my Controller
#RequestMapping("/neo4j/Movie")
public class MovieController {
private final MovieRepository movieRepository;
public MovieController(MovieRepository movieRepository) {
this.movieRepository = movieRepository;
}
#GetMapping("/graph")
public List<Movie> graph() {
return (List<Movie>) movieRepository.findAll();
}
}
This is my Repository
#Repository
public interface MovieRepository extends Neo4jRepository<Movie,Long> {
#Query("MATCH(m:Movie)<-[relation:ActedIn]-(b:Actor) RETURN m,relation,b")
Collection<Movie> graph();
}
And the application.properties
spring.data.neo4j.username=neo4j
spring.data.neo4j.password=neo4j
spring.data.neo4j.uri=bolt://localhost:7687
NodeEntity of moview
#NodeEntity
public class Movie {
#Id
private int id;
private String title;
private String genre;
// #JsonIgnoreProperties("movie")
#Relationship(type = "ActedIn")
private List<Actor> actors;
// #Relationship(type = "ACTED_IN" , direction = Relationship.INCOMING)
// private List<Actress> actresses = new ArrayList<>();
public Movie() {
}
public List<Actor> getActors() {
return actors;
}
public void setActors(List<Actor> actors) {
this.actors = actors;
}
public Movie(int id, String title, String genre, List<Actor> actors) {
this.id = id;
this.title = title;
this.genre=genre;
this.actors=actors;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getGenre() {
return genre;
}
public void setGenre(String genre) {
this.genre=genre;
}
}
And NodeEntity of Actor
public class Actor {
#GraphId
private Long id;
private String name;
private int age;
public Actor() {
}
public Actor(Long id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
I also tried springboot + neo4j projects downloaded from github, and also followed the instructions from neo4j website, but the projects still failed on my computer, so is there any super tutorials for neo4j and springboot?
I faced with problem of null value in PK.
Here's an entity:
#Entity
#Table(name="space")
public class Space implements Serializable {
#Id
#GeneratedValue
#Column(nullable = false, unique = true)
private Long id;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name="user_id")
private UserAccount user;
private String name;
private String description;
private Date createdTime;
private Date modifiedTime;
#OneToMany(mappedBy="space")
private Set<SpaceAccess> spaceAccesses = new HashSet<>();
public Set<SpaceAccess> getSpaceAccesses() {
return spaceAccesses;
}
public void setSpaceAccesses(Set<SpaceAccess> spaceAccesses) {
this.spaceAccesses = spaceAccesses;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Space() {}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public UserAccount getUser() {
return user;
}
public void setUser(UserAccount user) {
this.user = user;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getCreatedTime() {
return createdTime;
}
public void setCreatedTime(Date createdTime) {
this.createdTime = createdTime;
}
public Date getModifiedTime() {
return modifiedTime;
}
public void setModifiedTime(Date modifiedTime) {
this.modifiedTime = modifiedTime;
}
}
I wrote strategy to generate PK properly but I always get Null in id field when I create new instance of the Space:
Space space = new Space();
Here's content of the object:
What i should do to generate id of instance properly using hibernate/spring mechanisms?
application.properties:
spring.datasource.url="some_url"
spring.datasource.username=name
spring.datasource.password=password
spring.jpa.generate-ddl=true
P.S. I use spring-boot-starter-data-jpa with version: 2.3.4.RELEASE.
Use:
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
i made an api call using spring rest template as a rest client. when the method that makes the api returns a string, postman is able to see the object and the associated object properties with its values. but when i change the return type to an object that models the api object returned, i get all null values. is there something wrong i'm doing?
#GetMapping(value="/verbvn/{xbvn}")
public Participant verBVN(#PathVariable String xbvn) {
System.out.println("bvn is "+xbvn);
HttpHeaders headers = new HttpHeaders();
headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
headers.setBearerAuth("sk_live_32a7ffd9cc47f");
HttpEntity <String> entity = new HttpEntity<String>(headers);
Participant r= restTemplate.exchange("https://api.stck.co/bnk/resolve_bvn/"+xbvn, HttpMethod.GET, entity, new ParameterizedTypeReference<Participant>() {}).getBody();
System.out.println("the participant firstname is "+r.getFirstName());
return r;
}
public class Participant {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column
private Long id;
#OneToOne(cascade=CascadeType.ALL)
#JoinColumn(name="id",referencedColumnName="id")
private Data data;
public Participant() {
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Data getData() {
return data;
}
public void setData(Data data) {
this.data = data;
}
}
#Entity
#Table
#Async
#JsonIgnoreProperties(ignoreUnknown=true)
public class Data {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column
private Long id;
#Column
#JsonProperty(value="first_name")
private String firstName;
#Column
#JsonProperty(value="last_name")
private String lastName;
#Column
#JsonProperty(value="phone")
private String phoneNumber;
#Column
#JsonProperty(value="email")
private String email;
public Data() {}
public Long getId() {
return id;
}
public void setId(Long 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 String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
I've got problem with my entities. I've trade to make many-to-one connection between this two entities. I'm doing it like that:
User user = new User();
user.setName("a");
user.setLastName("b");
Set<Adress> a = new HashSet<Adress>();
Adress a1 = new Adress();
Adress a2 = new Adress();
a1.setCity("a1");
a2.setCity("a2");
a.add(a1);
a.add(a2);
user.setAdress(a);
userProxy.save(user);
My entites:
#Entity
public class User {
#Id
#GeneratedValue(strategy = GenerationType.TABLE)
private Long id;
#NotNull
private String name;
#NotNull
private String lastName;
#OneToMany(mappedBy="user", cascade=CascadeType.ALL)
private Set<Adress> adress = new HashSet<Adress>();
public User(String name, String lastName) {
this.name = name;
this.lastName = lastName;
}
public User() {
}
public Set<Adress> getAdress() {
return adress;
}
public void setAdress(Set<Adress> adress) {
this.adress = adress;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Long getId() {
return id;
}
}
Second Entity
#Entity
public class Adress {
#Id
#GeneratedValue(strategy=GenerationType.TABLE)
private Long id;
private String city;
#ManyToOne
#JoinColumn(name="user_id")
private User user;
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public Long getId() {
return id;
}
}
Data in table User saves fine, but in table adress field user_id is "NULL" can anyone explain to me why is that? I've tried a lots of combinations with #ManyToOne but nothing worked for me.
For more details UserProxy:
#Service
public class UserProxyDao {
private UserDao userDao;
#Autowired
public UserProxyDao(UserDao userDao) {
this.userDao = userDao;
}
public void save(User user) {
userDao.save(user);
}
}
however if i put #NotNull on field user in Adress entity validation fails... I really dont know why is that
Caused by: javax.validation.ConstraintViolationException: validation failed for classes [pl.rd.j2ee.api.domain.Adress] during persist time for groups [javax.validation.groups.Default, ]
You should be able to do this in one action as long as you do this first.
a1.setUser(user);
a2.setUser(user);
You could always add User to your Address constructor and do it there.
public Address (User user) {
this.user = user;
}