Does Spring Save Relationship Data too in Rest Call?

Does Spring Save Relationship Data too in Rest Call? - java

So If I have a User and a UserRole Table like soo..
User Class
package app.repo.User;
import javax.persistence.*;
import java.util.Set;
#Entity
#Table(name = "user")
public class User {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private long id;
#Version
private Long version;
#Column(nullable = false)
private String username;
#Column(nullable = false)
private String password;
#OneToMany(mappedBy = "user")
private Set<UserRole> roles;
protected User() {}
public User(String username, String password) {
this.username = username;
this.password = password;
}
#Override
public String toString() {
return String.format(
"User[id=%d, username='%s', password='%s']",
id, username, password);
}
public long getId() {
return id;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Set<UserRole> getRoles() {
return roles;
}
public void setRoles(Set<UserRole> roles) {
this.roles = roles;
}
}
UserRole Class
package app.repo.User;
import javax.persistence.*;
#Entity
#Table(name = "user_roles")
public class UserRole {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Version
private Long version;
#Column(name = "role_name")
private String roleName;
#ManyToOne
private User user;
public UserRole() {
}
public UserRole(String roleName, User user) {
this.roleName = roleName;
this.user = user;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Long getVersion() {
return version;
}
public void setVersion(Long version) {
this.version = version;
}
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
public void setUser(User user) {
this.user = user;
}
}
The above example has a oneToMany relationship with UserRole and a ManyToOne Relationship with user.
My first question is... is it possible to save User and UserRole in one save like so...
userDao.save(user);
And second question is. How would I set that up in a JSON post call ? and how would this be done. This is what I am doing now
{
"userId":"1",
"userName":"RestMan",
"password":"happy",
"version":"1",
"email":"restman#gmail.com",
"enabled":"1",
"roles": {
{"user":"1","role_name":"ROLE_COOLGUY"}
}
}
Otherwise I am thinking to just create a Model that saves the two separately in one method

Change the annotation like this : #OneToMany(cascade = CascadeType.ALL)

Related

How to access table created by join in JPA

I am creating an app where there are two entities
users
chatrooms
There is a many to many relationship between users and chatrooms.
I created a many to many relationship with a join table named users_chatrooms. The values are getting populated in the join table correctly when I wrote code for a user to join a chatroom.
My issue is that, I need an endpoint that can fetch all the users of a given chatroom. For this, I need the table created by the join (users_chatrooms) as part of Jpa. How to accomplish this in JPA ?
User class
package com.example.chat.models;
import javax.persistence.*;
import java.util.List;
#Entity
#Table(name="USERS")
public class User {
#Id
#Column(name="userid")
private String username;
#Column(name="pass")
private String password;
#ManyToMany(mappedBy = "users",fetch=FetchType.EAGER,cascade = CascadeType.ALL)
List<Chatroom>rooms;
public List<Chatroom> getRooms() {
return rooms;
}
public void setRooms(List<Chatroom> rooms) {
this.rooms = rooms;
}
public void setUsername(String username) {
this.username = username;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
Chatroom class
package com.example.chat.models;
import javax.persistence.*;
import java.util.List;
#Entity
#Table(name="Chatrooms")
public class Chatroom {
#Id
#Column(name="chatroomId")
private String id;
#Column(name="chatRoomName")
private String name;
#Column(name="chatroomDesc")
private String description;
#ManyToMany(fetch=FetchType.EAGER,cascade = CascadeType.ALL)
#JoinTable(
name = "users_chatrooms",
joinColumns = #JoinColumn(name = "chatroomId"),
inverseJoinColumns = #JoinColumn(name = "userid"))
private List<User>users;
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

You can simply join the two entities using #JoinColumn
#Entity
#Table(name="Chatrooms")
public class Chatroom {
#Id
#Column(name="chatroomId")
private String id;
#Column(name="chatRoomName")
private String name;
#Column(name="chatroomDesc")
private String description;
#ManyToMany(fetch=FetchType.EAGER,cascade = CascadeType.ALL)
#JoinColumn(name = "userid", referencedColumnName = "chatroomId")
private List<User>users;
// getters and setters
}

spring boot mysql jpa Command Line Runner problem

I want to create a user within the run () method using CommandLineRunner. I want to automatically call this method and register it with JPA as soon as Tomcat runs. Below I share the codes I use within the project.When I ran it this way, the tomcat server worked fine, the system started but was not registered to the database. How do I fix this?
User
#Data
#Entity
#Table(name = "user")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "user_id")
private int id;
#Column(name = "email")
#Email(message = "*Please provide a valid Email")
#NotEmpty(message = "*Please provide an email")
private String email;
#Column(name = "password")
#Length(min = 5, message = "*Your password must have at least 5 characters")
#NotEmpty(message = "*Please provide your password")
private String password;
#Column(name = "name")
#NotEmpty(message = "*Please provide your name")
private String name;
#Column(name = "last_name")
#NotEmpty(message = "*Please provide your last name")
private String lastName;
#Column(name = "active")
private int active;
//JOIN tables
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(name = "user_role", joinColumns = #JoinColumn(name = "user_id"), inverseJoinColumns = #JoinColumn(name = "role_id"))
private Set<Role> roles;
public User() {};
public User(String email, String password, String name, String lastName, int active) {
this.email=email;
this.password=password;
this.name=name;
this.lastName=lastName;
this.active=active;
}
//G&S
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
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 int getActive() {
return active;
}
public void setActive(int active) {
this.active = active;
}
public Set<Role> getRoles() {
return roles;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
}
Role
#Data
#Entity
#Table(name = "role")
public class Role {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "role_id")
private int id;
#Column(name = "role")
private String role;
//G&S
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
}
UserRepository
#Repository("userRepository")
public interface UserRepository extends JpaRepository<User, Long> {
User findByEmail(String email);
}
RoleRepository
#Repository("roleRepository")
public interface RoleRepository extends JpaRepository<Role, Integer> {
Role findByRole(String role);
}
Service
public class ServiceImplement implements CommandLineRunner{
#Autowired
UserService userService;
#Autowired
UserRepository userRepository;
#Autowired
RoleRepository roleRepository;
//$2y$12$YN6IjSzj5DYvSpv6jofxV.p8C.zSKKTdnDZ4oc0XT0TmODcUe.s62 = umut1234
User umut = null;
Role userRole = null;
#Override
public void run(String... args) throws Exception {
umut = new User();
umut.setEmail("umut#umut.com");
umut.setPassword("$2y$12$YN6IjSzj5DYvSpv6jofxV.p8C.zSKKTdnDZ4oc0XT0TmODcUe.s62");
umut.setName("Umut");
umut.setLastName("Eren");
umut.setActive(1);
userRole = roleRepository.findByRole("ADMIN");
umut.setRoles(new HashSet<Role>(Arrays.asList(userRole)));
userRepository.save(umut);
System.out.println("***Generated***");
}
}

import org.springframework.boot.ApplicationArguments
import org.springframework.boot.ApplicationRunner
// add these 2 lines and change your impelentation to ApplicationRunner
#Component
#Order(value = 1)
public class ServiceImplement implements ApplicationRunner{
#Autowired
UserService userService;
#Autowired
UserRepository userRepository;
#Autowired
RoleRepository roleRepository;
//$2y$12$YN6IjSzj5DYvSpv6jofxV.p8C.zSKKTdnDZ4oc0XT0TmODcUe.s62 = umut1234
User umut = null;
Role userRole = null;
#Override
public void run(ApplicationArguments args) throws Exception {
umut = new User();
umut.setEmail("umut#umut.com");
umut.setPassword("$2y$12$YN6IjSzj5DYvSpv6jofxV.p8C.zSKKTdnDZ4oc0XT0TmODcUe.s62");
umut.setName("Umut");
umut.setLastName("Eren");
umut.setActive(1);
//save user before add roles to it
userRepository.save(umut);
userRole = roleRepository.findByRole("ADMIN");
umut.setRoles(new HashSet<Role>(Arrays.asList(userRole)));
userRepository.save(umut);
System.out.println("***Generated***");
}
}

public class ServiceImplement implements ApplicationRunner {
#Autowired
UserService userService;
#Autowired
UserRepository userRepository;
#Autowired
RoleRepository roleRepository;
User umut = null;
Role userRole = null;
#Override
public void run(ApplicationArguments args) throws Exception {
String arguments = String.join(" | ", args.getSourceArgs());
System.out.println(arguments);
if(args.getNonOptionArgs().contains("-register"){
umut = new User();
umut.setEmail("umut#umut.com");
umut.setPassword("$2y$12$YN6IjSzj5DYvSpv6jofxV.p8C.zSKKTdnDZ4oc0XT0TmODcUe.s62");
umut.setName("Umut");
umut.setLastName("Eren");
umut.setActive(1);
userRole = roleRepository.findByRole("ADMIN");
umut.setRoles(new HashSet<Role>(Arrays.asList(userRole)));
userRepository.save(umut);
System.out.println("***Generated***");
}
}
}

TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing

I'm trying to store user details into the following tables: user, role, user_role. When trying to save the details, it throws the following error.
Error during managed flush
[org.hibernate.TransientPropertyValueException: object references an
unsaved transient instance - save the transient instance before
flushing
Here user_role is the parent table, user and role tables are the children. I tried with cascade = CASCADE.ALL. Even though it trows the same error.
User.java
#Entity
public class User implements UserDetails, Serializable{
private static final long serialVersionUID = 902783495L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="Id", nullable=false, updatable = false)
private Long id;
private String username;
private String password;
private String email;
private boolean enabled = true;
#OneToMany(mappedBy = "user", cascade=CascadeType.ALL, fetch = FetchType.EAGER)
#JsonIgnore
private Set<UserRole> userRoles = new HashSet<>();
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
public Set<UserRole> getUserRoles() {
return userRoles;
}
public void setUserRoles(Set<UserRole> userRoles) {
this.userRoles = userRoles;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
#Override
public Collection<? extends GrantedAuthority> getAuthorities() {
Set<GrantedAuthority> authorities = new HashSet<>();
userRoles.forEach(ur -> authorities.add(new Authority(ur.getRole().getName())));
return authorities;
}
#Override
public boolean isAccountNonExpired() {
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isAccountNonLocked() {
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isCredentialsNonExpired() {
// TODO Auto-generated method stub
return true;
}
#Override
public boolean isEnabled() {
return enabled;
}
}
Role.java
#Entity
public class Role implements Serializable{
private static final long serialVersionUID = 890245234L;
#Id
private int roleId;
private String name;
#OneToMany(mappedBy = "role", cascade=CascadeType.ALL, fetch = FetchType.LAZY)
private Set<UserRole> userRoles = new HashSet<>();
public Role(){}
public int getRoleId() {
return roleId;
}
public void setRoleId(int roleId) {
this.roleId = roleId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Set<UserRole> getUserRoles() {
return userRoles;
}
public void setUserRoles(Set<UserRole> userRoles) {
this.userRoles = userRoles;
}
}
UserRole.java
#Entity
#Table(name="user_role")
public class UserRole implements Serializable {
private static final long serialVersionUID = 890345L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long userRoleId;
public UserRole () {}
public UserRole (User user, Role role) {
this.user = user;
this.role = role;
}
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "user_id")
private User user;
#ManyToOne(fetch = FetchType.EAGER)
private Role role;
public long getUserRoleId() {
return userRoleId;
}
public void setUserRoleId(long userRoleId) {
this.userRoleId = userRoleId;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
}

Here role_id is primary key and you are trying to set 1 as role_id every time, make new primary key with
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long seqNo;

Error: AnnotationException: mappedBy reference an unknown target entity property

I'm creating Spring Boot Application with JPA PostgreSQL.
When I compile my spring project, got the following error.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: eveserver.core.entity.User.name in eveserver.core.entity.Role.users
Please, help me to understand what i'm doing wrong.
This is my User.java
package eveserver.core.entity;
import com.fasterxml.jackson.annotation.JsonIgnore;
import javax.persistence.*;
import java.io.Serializable;
import java.util.Set;
#Entity
#Table(name = "users")
public class User implements Serializable {
#Id
#GeneratedValue
private Long id;
#Column(name = "name")
private String username;
#JsonIgnore
#Column(name = "password")
private String password;
#Column(name = "email")
private String email;
private boolean enabled = false;
#ManyToMany
#JoinTable(name = "user_role",
joinColumns = #JoinColumn(name = "user_id", referencedColumnName = "id"),
inverseJoinColumns = #JoinColumn(name = "role_id", referencedColumnName = "id"))
private Set<Role> roles;
public User(){ }
public User(String username, String password, String email) {
this.username = username;
this.password = password;
this.email = email;
}
public User(String username, String password, String email, Set<Role> roles) {
this.username = username;
this.password = password;
this.email = email;
this.roles = roles;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Set<Role> getRoles() {
return roles;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
public void enable(){
enabled = true;
}
public void disable(){
enabled = false;
}
}
Role.java
package eveserver.core.entity;
import com.fasterxml.jackson.annotation.JsonIgnore;
import org.springframework.security.core.GrantedAuthority;
import javax.persistence.*;
import java.util.Set;
#Entity
#Table(name = "role")
public class Role implements GrantedAuthority {
#Id
#GeneratedValue
private Long id;
private String name;
#ManyToMany(mappedBy = "role")
#JsonIgnore
private Set<User> users;
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;
}
#Override
public boolean equals(Object obj){
if (obj instanceof Role){
Role r = (Role)obj;
if (r.getId()==this.getId()){
return true;
}
}
return false;
}
public Set<User> getUsers() {
return users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
#Override
public String getAuthority() {
return getName();
}
}
and this is my tables

In your User class, you have a property called roles:
public Set<Role> getRoles() {
return roles;
}
In your Role class, this:
#ManyToMany(mappedBy = "role")
#JsonIgnore
private Set<User> users;
should be:
#ManyToMany(mappedBy = "roles")
#JsonIgnore
private Set<User> users;
mappedBy = "something" is saying, effectively, "within this other entity, there's a property called something that gets a list of entities of this type (the current type that you're in when you use the #ManyToMany annotation). It is not specifying a type or class name like Role.

Java Spring Link Associate One to One relation

hoping I can get some assistance resolving a particular issue. I am basically trying to create a rest api endpoint that displays my one to one relationship between my User & UserProfile class. I am trying to do this using annotations but I'm not having any luck. I can't seem to return both the user info as well as associated profile info. Here are my classes
package com.account.service.model;
import com.fasterxml.jackson.annotation.JsonBackReference;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonIgnore;
import javax.persistence.*;
import java.util.Date;
#Entity
#Table(name = "users")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String email;
private Boolean active;
#JsonIgnore
private String password;
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
private Date created_at;
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
private Date updated_at;
#OneToOne(cascade = CascadeType.ALL, mappedBy = "user")
#JoinColumn(name = "user_id")
#JsonBackReference
private UserProfile userProfile;
public User(){}
public User(String email, Boolean active, String password, Date created_at, Date updated_at) {
this.email = email;
this.active = active;
this.password = password;
this.created_at = created_at;
this.updated_at = updated_at;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Boolean getActive() {
return active;
}
public void setActive(Boolean active) {
this.active = active;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Date getCreated_at() {
return created_at;
}
public void setCreated_at(Date created_at) {
this.created_at = created_at;
}
public Date getUpdated_at() {
return updated_at;
}
public void setUpdated_at(Date updated_at) {
this.updated_at = updated_at;
}
public UserProfile getUserProfile() {
return userProfile;
}
public void setUserProfile(UserProfile userProfile) {
this.userProfile = userProfile;
}
}
and here is the User Profile
package com.account.service.model;
import com.fasterxml.jackson.annotation.JsonManagedReference;
import javax.persistence.*;
#Entity
#Table(name = "user_profiles")
public class UserProfile {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String first_name;
private String last_name;
#OneToOne(cascade = CascadeType.ALL, optional = false)
#JsonManagedReference
private User user;
public UserProfile(){}
public UserProfile(String first_name, String last_name, User user) {
this.first_name = first_name;
this.last_name = last_name;
this.user = user;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getFirst_name() {
return first_name;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public String getLast_name() {
return last_name;
}
public void setLast_name(String last_name) {
this.last_name = last_name;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
The response I get is the following which is missing the profile association.
[
{
"id": 1,
"email": "ul#gmail.com",
"active": true,
"created_at": "2017-12-21",
"updated_at": "2017-12-21"
}
]
Any thoughts on what the issue could be?
The intention is to display the following:
[
{
"id": 1,
"email": "ul#gmail.com",
"active": true,
"created_at": "2017-12-21",
"updated_at": "2017-12-21",
"profile": {
"id": 1,
"first_name": "master",
"last_name": "splinter"
}
}
]

Figured it out, if anyone else is stuck on an issue like this please take a look at #JsonBackReference this should be used on your User class not on your Profile class.

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Does Spring Save Relationship Data too in Rest Call? - java

Change the annotation like this : #OneToMany(cascade = CascadeType.ALL)

Related

How to access table created by join in JPA

spring boot mysql jpa Command Line Runner problem

TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing

Error: AnnotationException: mappedBy reference an unknown target entity property

Java Spring Link Associate One to One relation

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