Here's MVCE: https://github.com/neo4j-examples/movies-java-spring-data-neo4j If you change one test to:
@Test
public void testFindByTitle() {
String title = "The Matrix";
Movie result = movieRepository.findByTitle(title);
Person p = personRepository.findByName("Keanu Reeves");
assertNotNull(result);
assertEquals(1999, result.getReleased());
}
You can see in debug mode that object p
does not have any movies
.
Person
entity is:
@NodeEntity
public class Person {
@Id
@GeneratedValue
private Long id;
private String name;
private int born;
@Relationship(type = "ACTED_IN")
private List<Movie> movies = new ArrayList<>();
public Person() {
}
public Person(String name, int born) {
this.name = name;
this.born = born;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public int getBorn() {
return born;
}
public List<Movie> getMovies() {
return movies;
}
}
This is offical example from neo4j. How can i store entity Person
with movies
in database and also have Movie
entity with roles
?
Edit: What i can do is add in Person
entity method:
public void addMovie(Movie movie) {
if (this.movies == null) {
this.movies = new ArrayList<>();
}
this.movies.add(movie);
}
And in the test add:
p.addMovie(matrix);
personRepository.save(p);
But i don't like this - cause i setting it manually from two sites.
You do not need to set the references manually from two sides. Expand your code snippet slightly by a single line movie.setPerson(this);
and you are done:
public void addMovie(@NotNull Movie movie) {
if (this.movies == null)
this.movies = new ArrayList<>();
this.movies.add(movie);
movie.setPerson(this);
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.