問題加入與獲取where子句同一實體

Question

我已經在我的倉庫下面的查詢：

SELECT p FROM Project p JOIN p.users u WHERE u.login =:login 

有一個許多人的用戶和項目之間有許多relationshio。 一切工作正常，它返回用戶的項目，但我希望它爲每個項目返回相應的用戶組。因此，與更新，它抓取連接：

SELECT p FROM Project p JOIN FETCH p.users JOIN p.users u WHERE u.login =:login 

但現在我得到了以下異常：

nested exception is java.lang.IllegalArgumentException: Count query validation failed for method public abstract org.springframework.data.domain.Page com.example.app.repository.ProjectRepository.findAllByUserLo‌​gin(java.lang.String‌​,org.springframework‌​.data.domain.Pageabl‌​e)! org.hibernate.QueryException: query specified join fetching, but the owner of the fetched association was not present in the select list 

無法找到一種解決方法是執行where子句，並在同一時間內獲取的集合。

項目單位：

@Entity 
@Table(name = "project") 
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) 
@Document(indexName = "project") 
public class Project implements Serializable { 

private static final long serialVersionUID = 1L; 

@Id 
@GeneratedValue(strategy = GenerationType.AUTO) 
private Long id; 

@NotNull 
@Size(min = 10, max = 50) 
@Column(name = "name", length = 50, nullable = false) 
private String name; 

@Size(max = 150) 
@Column(name = "description", length = 150) 
private String description; 

@Column(name = "project_type") 
private Integer projectType; 

@Column(name = "is_active") 
private Boolean isActive; 

@Column(name = "date_created") 
private ZonedDateTime dateCreated; 

@Column(name = "date_updated") 
private ZonedDateTime dateUpdated; 

@ManyToMany 
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) 
@JoinTable(name = "project_user", 
      joinColumns = @JoinColumn(name="projects_id", referencedColumnName="ID"), 
      inverseJoinColumns = @JoinColumn(name="users_id", referencedColumnName="ID")) 
private Set<User> users = new HashSet<>(); 

@OneToMany(mappedBy = "project") 
@JsonIgnore 
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) 
private Set<Milestone> milestones = new HashSet<>(); 

@OneToMany(mappedBy = "project") 
@JsonIgnore 
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) 
private Set<TaskList> taskLists = new HashSet<>(); 

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; 
} 

public String getDescription() { 
    return description; 
} 

public void setDescription(String description) { 
    this.description = description; 
} 

public Integer getProjectType() { 
    return projectType; 
} 

public void setProjectType(Integer projectType) { 
    this.projectType = projectType; 
} 

public Boolean isIsActive() { 
    return isActive; 
} 

public void setIsActive(Boolean isActive) { 
    this.isActive = isActive; 
} 

public ZonedDateTime getDateCreated() { 
    return dateCreated; 
} 

public void setDateCreated(ZonedDateTime dateCreated) { 
    this.dateCreated = dateCreated; 
} 

public ZonedDateTime getDateUpdated() { 
    return dateUpdated; 
} 

public void setDateUpdated(ZonedDateTime dateUpdated) { 
    this.dateUpdated = dateUpdated; 
} 

public Set<User> getOwners() { 
    return users; 
} 

public void setOwners(Set<User> users) { 
    this.users = users; 
} 

public Set<Milestone> getMilestones() { 
    return milestones; 
} 

public void setMilestones(Set<Milestone> milestones) { 
    this.milestones = milestones; 
} 

public Set<TaskList> getTaskLists() { 
    return taskLists; 
} 

public void setTaskLists(Set<TaskList> taskLists) { 
    this.taskLists = taskLists; 
} 

@Override 
public boolean equals(Object o) { 
    if (this == o) { 
     return true; 
    } 
    if (o == null || getClass() != o.getClass()) { 
     return false; 
    } 
    Project project = (Project) o; 
    if(project.id == null || id == null) { 
     return false; 
    } 
    return Objects.equals(id, project.id); 
} 

@Override 
public int hashCode() { 
    return Objects.hashCode(id); 
} 

@Override 
public String toString() { 
    return "Project{" + 
     "id=" + id + 
     ", name='" + name + "'" + 
     ", description='" + description + "'" + 
     ", projectType='" + projectType + "'" + 
     ", isActive='" + isActive + "'" + 
     ", dateCreated='" + dateCreated + "'" + 
     ", dateUpdated='" + dateUpdated + "'" + 
     '}'; 
    } 
} 

用戶實體：

@Entity 
@Table(name = "user") 
@Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE) 
@Document(indexName = "user") 
public class User extends AbstractAuditingEntity implements Serializable { 

private static final long serialVersionUID = 1L; 

@Id 
@GeneratedValue(strategy = GenerationType.AUTO) 
private Long id; 

@NotNull 
@Pattern(regexp = Constants.LOGIN_REGEX) 
@Size(min = 1, max = 100) 
@Column(length = 100, unique = true, nullable = false) 
private String login; 

@JsonIgnore 
@NotNull 
@Size(min = 60, max = 60) 
@Column(name = "password_hash",length = 60) 
private String password; 

@Size(max = 50) 
@Column(name = "first_name", length = 50) 
private String firstName; 

@Size(max = 50) 
@Column(name = "last_name", length = 50) 
private String lastName; 

@Email 
@Size(max = 100) 
@Column(length = 100, unique = true) 
private String email; 

@NotNull 
@Column(nullable = false) 
private boolean activated = false; 

@Size(min = 2, max = 5) 
@Column(name = "lang_key", length = 5) 
private String langKey; 

@Size(max = 20) 
@Column(name = "activation_key", length = 20) 
@JsonIgnore 
private String activationKey; 

@Size(max = 20) 
@Column(name = "reset_key", length = 20) 
private String resetKey; 

@Column(name = "reset_date", nullable = true) 
private ZonedDateTime resetDate = null; 

@Column(name = "avatar", nullable = true) 
private String avatar; 

public Long getId() { 
    return id; 
} 

public void setId(Long id) { 
    this.id = id; 
} 

public String getLogin() { 
    return login; 
} 

public void setLogin(String login) { 
    this.login = login.toLowerCase(Locale.ENGLISH); 
} 

public String getAvatar() { 
    return avatar; 
} 

public void setAvatar(String avatar) { 
    this.avatar = avatar; 
} 

public String getPassword() { 
    return password; 
} 

public void setPassword(String password) { 
    this.password = password; 
} 

public String getFirstName() { 
    return firstName; 
} 

public void setFirstName(String firstName) { 
    this.firstName = firstName; 
} 

public String getLastName() { 
    return lastName; 
} 

public void setLastName(String lastName) { 
    this.lastName = lastName; 
} 

public String getEmail() { 
    return email; 
} 

public void setEmail(String email) { 
    this.email = email; 
} 

public boolean getActivated() { 
    return activated; 
} 

public void setActivated(boolean activated) { 
    this.activated = activated; 
} 

public String getActivationKey() { 
    return activationKey; 
} 

public void setActivationKey(String activationKey) { 
    this.activationKey = activationKey; 
} 

public String getResetKey() { 
    return resetKey; 
} 

public void setResetKey(String resetKey) { 
    this.resetKey = resetKey; 
} 

public ZonedDateTime getResetDate() { 
    return resetDate; 
} 

public void setResetDate(ZonedDateTime resetDate) { 
    this.resetDate = resetDate; 
} 

public String getLangKey() { 
    return langKey; 
} 

public void setLangKey(String langKey) { 
    this.langKey = langKey; 
} 

@Override 
public boolean equals(Object o) { 
    if (this == o) { 
     return true; 
    } 
    if (o == null || getClass() != o.getClass()) { 
     return false; 
    } 

    User user = (User) o; 

    if (!login.equals(user.login)) { 
     return false; 
    } 

    return true; 
} 

@Override 
public int hashCode() { 
    return login.hashCode(); 
} 

@Override 
public String toString() { 
    return "User{" + 
     "login='" + login + '\'' + 
     ", avatar='" + avatar + '\'' + 
     ", firstName='" + firstName + '\'' + 
     ", lastName='" + lastName + '\'' + 
     ", email='" + email + '\'' + 
     ", activated='" + activated + '\'' + 
     ", langKey='" + langKey + '\'' + 
     ", activationKey='" + activationKey + '\'' + 
     "}"; 
    } 


} 

Answer 1

嘗試刪除第二join：

SELECT p FROM Project p JOIN FECTH p.users u WHERE u.login =:login

如果你想獲得項目，其中包含指定用戶通過登錄，然後你可以試試這個：

SELECT p FROM Project p JOIN FECTH p.users u WHERE :login in elements(u.login)