Targeting unmapped class error in Spring boot app - spring

Question

I work on basic exemplary app that is about #OneToMany & ManyToOne annotation. I define mapping between two classes, apparently there is no error but on running app it gives me an error : Use of #OneToMany or #ManyToMany targeting an unmapped class: com.orchard.orchard.model.AppUser.userRole[ com.orchard.orchard.model.UserRole]
I'm failed to understand where does problem lies as mapping also describe in AppUser. I'd be grateful for the help.
Classes are as follows:
AppUser.java
package com.orchard.orchard.model;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
#Entity
public class AppUser {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(updatable = false, nullable = false)
private Integer id;
private String name;
#Column(unique = true)
private String username;
private String password;
private String email;
#Column(columnDefinition = "text")
private String bio;
private Date createdDate;
#OneToMany(mappedBy = "appUser", cascade = CascadeType.ALL, fetch =
FetchType.EAGER)
private Set<UserRole> userRole = new HashSet<>();
public AppUser() {
}
public AppUser(Integer id, String name, String username, String
password, String email, String bio,
Date createdDate, Set<UserRole> userRoles) {
this.id = id;
this.name = name;
this.username = username;
this.password = password;
this.email = email;
this.bio = bio;
this.createdDate = createdDate;
this.userRole = userRoles;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
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 String getBio() {
return bio;
}
public void setBio(String bio) {
this.bio = bio;
}
public Date getCreatedDate() {
return createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
public Set<UserRole> getUserRoles() {
return userRole;
}
public void setUserRoles(Set<UserRole> userRoles) {
this.userRole = userRoles;
}
}
UserRole.java
package com.orchard.orchard.model;
import javax.persistence.Column;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import com.fasterxml.jackson.annotation.JsonIgnore;
public class UserRole {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private long userRoleId;
#ManyToOne
#JoinColumn(name = "user_id")
#JsonIgnore
private AppUser appUser;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "role_id")
private Role role;
public UserRole() {
}
public UserRole(long userRoleId, AppUser appUser, Role role) {
this.userRoleId = userRoleId;
this.appUser = appUser;
this.role = role;
}
public long getUserRoleId() {
return userRoleId;
}
public void setUserRoleId(long userRoleId) {
this.userRoleId = userRoleId;
}
public AppUser getAppUser() {
return appUser;
}
public void setAppUser(AppUser appUser) {
this.appUser = appUser;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
}

Answer 1

You forgot to add #Entity annotation to your UserRole class
#Entity
public class UserRole {
}