I want to make association to some many-to-many relation entity
#Entity
#Table(name = "users")
#Data
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "user_id")
private String userId;
private String name;
#OneToMany(mappedBy = "user")
private List<UserGroups> userGroups;
#Table(name = "groups")
#Data
public class Group {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "group_id")
private String groupId;
private String category;
private String name;
private String description;
#OneToMany(mappedBy = "group")
private List<UserGroups> userGroups;
public void addUser(User user){
UserGroup newUserGroup = new UserGroup();
newUserGroup.setName(user.getName())
userGroups.add(newUserGroup);
user.getUserGroups().add(newUserGroup)
}
#Entity
#Data
#Table(name = "user_groups")
public class UserGroups {
#EmbeddedId
UserGroupsCompositeKey id;
#ManyToOne
#MapsId("userId")
#JoinColumn(name = "user_id")
private Users user;
#ManyToOne
#MapsId("featureId")
#JoinColumn(name = "group_id")
private Group group;
private Date created;
I trying to add POST method to service where I should get group_id from endpoint url and assosiate user_id in request body. My Service method looks like this.
#Override
public ResponseEntity<String> createUsersGroup(String groupId,
String userId) {
Optional<Group> group = groupRepository.findById(groupId).get();
Optional<User> user = userRepository.findById(userId).get();
group.addUser(user);
return ResponseEntity.ok(userId);
};
}
Is there some more proper way to do this or when I will add more users in request body I will have to pull out every user from the database and add it like that ?
Related
i have Three entities User, Institution and Role.
1)one to many between user and institution
2)and many to many between User and Role
-------user-------
#Entity
#Table(name = "user")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="user_Id")
private int userId;
#Column(name="name")
private String name;
#Column(name="lastname")
private String lastname;
#Column(name="email")
private String email;
#Column(name="password")
private String password;
#Column(name="isActive")
private boolean isActive;
#Column(name="lastActive")
private String lastActive;
#Column(name="createdDate")
private String createdDate;
#Column(name="isBlocked")
private boolean isBlocked;
#ManyToOne(fetch = FetchType.LAZY, optional = false)
#JoinColumn(name = "institution_id", nullable = false)
#JsonIgnoreProperties(value = {"user"})
private Institution institution;
#ManyToMany(fetch = FetchType.LAZY)
#JoinTable(name = "user_has_role",
joinColumns = {
#JoinColumn(name = "user_id", referencedColumnName = "user_id",
nullable = false, updatable = true)},
inverseJoinColumns = {
#JoinColumn(name = "role_id", referencedColumnName = "role_id",
nullable = false, updatable = true)})
#JsonIgnoreProperties(value = {"users"})
private Set<Role> roles = new HashSet<>();
}
-------institution-------
#Getter
#Setter
#NoArgsConstructor
#AllArgsConstructor
#ToString
#Entity
#Table(name = "institution")
public class Institution {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="institution_Id")
private int institutionId;
#Column(name="name")
private String name;
#Column(name="type")
private String type;
#Column(name="location")
private String location;
#OneToMany(mappedBy = "institution", fetch = FetchType.LAZY)
#JsonIgnoreProperties(value = {"institution" , "user"})
private Set<User> user;
}
-------role-------
#Getter
#Setter
#NoArgsConstructor
#AllArgsConstructor
#ToString
#Entity
#Table(name = "role")
public class Role {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="role_Id")
private int roleId;
#Column(name="name")
private String name;
#Column(name="description")
private String description;
#ManyToMany(mappedBy = "roles", fetch = FetchType.LAZY)
#JsonIgnoreProperties(value = {"roles"})
private Set<User> users = new HashSet<>();
}
Those are my 3 entities and tables in MySql
i have 7 roles
• Super-User
• Bank-Admin
• Bank-Support
• Bank-Service
• Merchant-Admin
• Merchant-Support
• Merchant-service
The super-User can create a user of any role
#PostMapping("/addUser")
public String addUser(#RequestBody User user) {
String rawpassword = user.getPassword();
String encodedpasswrod = passwordencoder.encode(rawpassword);
user.setPassword(encodedpasswrod);
userrepository.save(user);
return "user saved with name: " + user.getName();
}
this api works and i can set the role to anything in my api json body
But want that if the User is Bank-Admin he can only create Bank-Support and Bank-Service
im trying to create a new API which can only create a user with those 2 specific roles.
and then restrict the bank admin to access the other API that can create users of any kind.
is there any other way to do it and if no how can i do that...
You have to implement your custom implementation of User Entitlement.
Like according to login person, you will get that login person role, and according to your criteria just put validation like check that entity he is trying to add is he eligible to create it.
Map<String, List<String>> roleUserAccessMap = new HashMap<>();
roleUserAccessMap.put("Bank-Admin", Arrays.asList("Bank-Support", "Bank-Service"));
Just check like below
String loginPersonRole="Bank-Admin"; //This value should get from logged-in person context
if(roleUserAccessMap.containsKey(loginPersonRole) && roleUserAccessMap.get(loginPersonRole).contains(newuserrole) ){
//proceed ahead with Add api
}else{
System.out.println("You do not have enough privileage to create Use");
}
This will help you.
I have two Entities in my Spring-Boot Application:
User.java
#Entity
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
Long id;
String firstname;
String lastname;
String username;
String password;
}
and
Role.java
Entity
#Table(name = "role")
public class Role {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
Long id;
String name;
String description;
}
for my MySql database
I have excluded the getter and setter methods for this question.
I want to realise a Many-to-Many-Relationship between both Entities. Every user should be able to assign multiple roles to himself
I already Created a mapping table for both tables in my database. It has the rows
user_id
role_id.
I also created a new Entity UserRole.java which looks like this:
#Entity
#Table(name = "user_role")
public class UserRole implements Serializable{
private User user;
private Role role;
#Id
#ManyToOne
#JoinColumn(name = "user_id")
public User getuser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
#Id
#ManyToOne
#JoinColumn(name = "role_id")
public Role getrole(){
return role;
}
public void setRole(Role role){
this.role = role;
}
}
Now my question: is this construction correct? If yes, how do i add existing roles to an existing user and get the roles of this user in spring-boot?
You can find any tutorial connected with many-to-many relationship using Hibernate/Spring Data, example:
Spring Data many-to-many
With your model it's simple to add the relationship mappings, like this:
#Entity
public class Role {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
private String description;
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable
private Set<User> users;
}
and this:
#Entity
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String firstname;
private String lastname;
private String username;
private String password;
#ManyToMany(mappedBy = "users")
private Set<Role> roles;
}
I have two entites as follows
user entity
#Entity
#Table(name = "user")
#Getter
#Setter
public class UserEntity{
#Id
#GeneratedValue(strategy = GeneratedType.IDENTITY)
#Column(name = "user_id")
private Long userId;
#Column(name = "user_name")
private String name;
#OneToOne(Cascade=CascadeType.ALL, mappedBy="user")
private UserAddressEntity addressEntity;
}
user address entity
#Entity
#Table(name = "user_address")
#Getter
#Setter
public class UserAddressEntity{
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "user_id")
private Long userId;
#Column(name = "address")
private String address;
#OneToOne
#JoinColumn(name = "user_id", nullable = false, referencedColumnName = "user_id")
private UserEntity user;
}
I am saving user entity as follows in service class
#Service
public class UserService{
#Autowired
private UserRepository userRepository;
public void saveUser(){
UserEntity userEntity=new UserEntity();
UserAddressEntity userAddressEntity=new UserAddressEntity();
//logic here
userEntity.setAddressEntity(userAddressEntity);
userRepository.save(userEntity);
}
}
After saving entity user_id column is not being saved in user_address table. It's value is saved as null.I can't seem to find where the issue is.
EDIT:
I have added following to entities after answer referred in comments but I am getting this error
Infinite recursion (StackOverflowError)
#Entity
#Table(name = "user")
#Getter
#Setter
public class UserEntity{
#Id
#GeneratedValue(strategy = GeneratedType.IDENTITY)
#Column(name = "user_id")
private Long userId;
#Column(name = "user_name")
private String name;
#OneToOne(Cascade=CascadeType.ALL, mappedBy="user")
private UserAddressEntity addressEntity;
//added this
public void setAddressEntity(UserAddressEntity addressEntity){
if (!addressEntity.equals(this.addressEntity)){
this.addressEntity=addressEntity;
addressEntity.setUser(this);
}
}
#Entity
#Table(name = "user_address")
#Getter
#Setter
public class UserAddressEntity{
#Id
#Column(name = "id")
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name = "user_id")
private Long userId;
#Column(name = "address")
private String address;
#OneToOne
#JoinColumn(name = "user_id", nullable = false, referencedColumnName = "user_id")
private UserEntity user;
//added this
public void setUser(UserEntity user){
if (!user.equals(this.user){
this.user=user;
}
}
}
You need to set the relationship correctly in UserService.saveUser():
userEntity.setAddressEntity(userAddressEntity);
userAddressEntity.setUser(userEntity);
Also, use regular getters/setters, no need to add logic there.
The recommended/best way to map a #OneToOne is to use #MapsId. With that approach, you don’t need at all a bidirectional association.
I would advise you to take look at link below, there you have answer to your question with example how to save and map between objects.
https://vladmihalcea.com/the-best-way-to-map-a-onetoone-relationship-with-jpa-and-hibernate/
I am doing an application where I need 2 entities: User and Car.
public class User{
private long id;
private String name;
}
public class Car{
private long id;
private User firstUser;
private User secondUser;
}
So my table cars_info info will contain
RENT(date), FIRST_USER(id), SECOND_USER(id)
How do I connect this using hibernate? I need unidirectional relation. I tried OneToOne, ManyToOne but neither of that works.
Check that you're properly naming the column on your CAR table vs the reference column on the USER table. Example below:
#Entity
#Table(name = "USER")
public class User {
#Id
#Column(name = "USER_ID")
private long id;
#Column(name = "NAME")
private String name;
}
#Entity
#Table(name = "CAR")
public class Car {
#Id
#Column(name = "CAR_ID")
private long id;
#ManyToOne
#JoinColumn(name = "FIRST_USER_ID", referencedColumnName = "USER_ID")
private User firstUser;
#ManyToOne
#JoinColumn(name = "SECOND_USER_ID", referencedColumnName = "USER_ID")
private User secondUser;
}
I have two entities User and Wish :
#Entity
#Table(name = "T_USER")
public class User implements Serializable {
#Column(length = 50)
private String lastname;
#Column(length = 50)
private String firstname;
#OneToMany(mappedBy = "user",cascade = CascadeType.ALL,fetch = FetchType.EAGER)
#Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
private Set<Wish> wishes = new HashSet<Wish>();
// getters and setters
}
#Entity
#Table(name = "T_WISH")
public class Wish implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "title")
private String title;
#Column(name = "description")
private String description;
#ManyToOne
private User user;
// getters and setters
}
When i save the user, recruiter_id is null why. I've tried :
Wish wish = wishRepository.save(wish);
user.getWishes.add(wish);
User userSaved = userRepository.save(user);
Why the recruiter_id is not set.
Your user class does not have #Id anottated field.