CRUD in JPA many to one bidirectional relationship - mysql

Question

I need to create a many-to-one relationship and I do not know if I'm doing it correctly because I cant do update and delete correctly. I'm using Spring boot and JPA repository in Java, the database is mysql.
I have a Post with a name, every Post can have several Comments, but I need use all together, if I want to add a comment, I sent the post with the new comment, for example:
{
"name":"PostName",
"comment: [
{
"text":"comment 1"
},
{
"text":"comment 2"
}
]
}
Post.java
#Entity
public class Post {
#Id
#Column(name = "Post")
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String name;
#OneToMany(cascade = CascadeType.ALL,
fetch = FetchType.LAZY,
mappedBy = "post")
private List<Comments> Comments = new ArrayList<>();
// Get and Set
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;
}
}
Comments.java
#Entity
public class Comments {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String text;
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "post_id")
#JsonIgnore
private Post post;
// Get and Set
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
}
PostRepository.java
public interface PostRepository extends JpaRepository<Post, Long> {
Club findByName(#Param("name") String name);
}
Controller.java
#Autowired
PostRepository postRepository;
#RequestMapping(value="/posts", method=RequestMethod.GET, produces = "application/json")
public ResponseEntity<?> getPost(Pageable pageable){
try {
Page<Post> posts = postRepository.findAll(pageable);
return new ResponseEntity<>(posts,HttpStatus.ACCEPTED);
} catch (Exception e) {
e.printStackTrace();
return new ResponseEntity<>(HttpStatus.NOT_ACCEPTABLE);
}
}
#RequestMapping(value="/newPost", method=RequestMethod.POST, produces = "application/json")
public ResponseEntity<?> newPost(#RequestBody Post post){
try {
for (Comments comments: post.getComments()){
comments.setPost(post);
}
postRepository.save(post);
return new ResponseEntity<>(HttpStatus.CREATED);
} catch (Exception e) {
e.printStackTrace();
return new ResponseEntity<>(HttpStatus.NOT_ACCEPTABLE);
}
}
I don't know if my work is right and I need update and delete methods.