Why does not it work SequenceGenerator in Spring Boot? - spring-boot

Question

I make a blog on Spring Boot + Spring Date
There is a post, user, comment, and entities that contain links between them.
For each of these 6 entities, I added the annotation
#SequenceGenerator (name = "...", sequenceName = "...", allocationSize = 1)
Also created in the Database additionally hibernate_sequencе
However, the following problems arise.
When I add a post (with id = 1) and delete it, and then create a new post, it is already with id 2, not id 1
When I try to add a comment to it,then throws an error that usually occurs if there is no SequenceGenerator.
Error:
ERROR: insert or update on table "posts_comments" violates foreign key constraint "posts_comments_post_id_fkey"
DETAIL: Key (post_id) = (5) is not present in table
Why?
add comment in CommentService
public void create(Comments new_comment,Long parent_id, String login, int post_id)
{
Users user=userService.findByLogin(login);
Posts post=postsRepository.findById((long) post_id).get();
if((parent_id!=null)&&(commentsRepository.existsById(parent_id)))
{
Comments parentComment=commentsRepository.findById(parent_id).get();
parentComment.getChildComment().add(new_comment);
commentsRepository.save(parentComment);
}
new_comment.setOwnerpost(post);
new_comment.setOwner(user);
commentsRepository.save(new_comment);
}
Comment
#Entity
#Table(name = "comments")
#Setter
#Getter
#NoArgsConstructor
#AllArgsConstructor
public class Comments implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#SequenceGenerator(name = "clientsIdSeq1", sequenceName = "comments_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE,generator="comments_id_seq")
private Long id;
#Column(name = "title")
private String title;
#Column(name = "content")
private String content;
#Column(name = "date_create")
private LocalDate dateCreate;
#Column(name = "count_like")
private Long countLike;
#Column(name = "count_dislike")
private Long counterDislike;
#OneToMany(fetch= FetchType.EAGER,cascade=CascadeType.ALL ,orphanRemoval=true )
#JoinTable(name = "parentchild_comment",
joinColumns = #JoinColumn(name= "parent_id"),
inverseJoinColumns = #JoinColumn(name= "child_id"))
#Fetch(value = FetchMode.SUBSELECT)
private List<Comments> childComment;
#ManyToOne(fetch= FetchType.EAGER,cascade=CascadeType.ALL )
#JoinTable(name = "users_comments",
joinColumns = #JoinColumn(name= "comment_id"),
inverseJoinColumns = #JoinColumn(name= "user_id"))
#JsonIgnoreProperties({"listPost", "listComment"})
private Users owner;
#ManyToOne(fetch= FetchType.EAGER,cascade = {CascadeType.REFRESH })
#JoinTable(name = "posts_comments",
joinColumns = #JoinColumn(name= "post_id"),
inverseJoinColumns = #JoinColumn(name= "comment_id"))
#JsonIgnoreProperties({"listComments"})
private Posts ownerpost;
}
Post
#Entity
#Table(name = "posts")
#Setter
#Getter
#NoArgsConstructor
#AllArgsConstructor
public class Posts implements Serializable {
#Id
#Column(name = "id")
#SequenceGenerator(name = "clientsIdSeq4", sequenceName = "posts_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE,generator ="posts_id_seq" )
private Long id ;
#Column(name = "title")
private String title;
#Column(name = "content")
private String content;
#Column(name = "date_create")
private LocalDate dateCreate;
#Column(name = "count_like")
private Long countLike;
#Column(name = "count_dislike")
private Long counterDislike;
#OneToMany(mappedBy = "ownerpost",fetch= FetchType.EAGER,cascade=CascadeType.ALL,orphanRemoval=true )
#Fetch(value = FetchMode.SUBSELECT)
#JsonIgnoreProperties("childComment")
private List<Comments> listComments;
#ManyToOne(fetch= FetchType.EAGER,cascade=CascadeType.REFRESH)
#JoinTable(name = "users_posts",
joinColumns = #JoinColumn(name= "post_id"),
inverseJoinColumns = #JoinColumn(name= "user_id"))
#JsonIgnoreProperties({"listPost", "listComment"})
private Users owner;
}
User
#Entity
#Table(name = "users")
#Setter
#Getter
#NoArgsConstructor
#AllArgsConstructor
public class Users implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#SequenceGenerator(name = "clientsIdSeq5", sequenceName = "users_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "users_id_seq")
private Long id;
#Column(name = "login")
private String login;
#Column(name = "password")
private String password;
#ManyToOne(optional = false, cascade = CascadeType.REFRESH)
#JoinColumn(name = "position_id")
private Position position;
#OneToMany(mappedBy = "owner",fetch= FetchType.EAGER,cascade=CascadeType.ALL,orphanRemoval=true )
#JsonIgnoreProperties("listComments")
#Fetch(value = FetchMode.SUBSELECT)
private List<Posts> listPost;
#OneToMany(mappedBy = "owner",fetch= FetchType.EAGER,cascade=CascadeType.ALL,orphanRemoval=true )
#JsonIgnoreProperties("childComment")
#Fetch(value = FetchMode.SUBSELECT)
private List<Comments> listComment;
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof Users)) return false;
Users users = (Users) o;
if (!Objects.equals(id, users.id)) return false;
if (!Objects.equals(login, users.login)) return false;
if (!Objects.equals(password, users.password)) return false;
if (!Objects.equals(position, users.position)) return false;
if (!Objects.equals(listPost, users.listPost)) return false;
return Objects.equals(listComment, users.listComment);
}
#Override
public int hashCode() {
int result = id != null ? id.hashCode() : 0;
result = 31 * result + (login != null ? login.hashCode() : 0);
result = 31 * result + (password != null ? password.hashCode() : 0);
result = 31 * result + (position != null ? position.hashCode() : 0);
result = 31 * result + (listPost != null ? listPost.hashCode() : 0);
result = 31 * result + (listComment != null ? listComment.hashCode() : 0);
return result;
}
}
my code https://dropmefiles.com/pdv48
Insomnia with with requests https://dropmefiles.com/jPOgB

Answer 1

You mixed the name and the sequence name. The generator attribute must be then name not the sequenceName
#SequenceGenerator(name = "clientsIdSeq1", sequenceName = "comments_id_seq", allocationSize = 1)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator="clientsIdSeq1")