春季數據異常查詢

Question

我對春季數據查詢有問題。我想要接收用戶已賦予角色的用戶（列表）（角色在列表中）並且此用戶（列表）的assignedOrders爲空或此訂單處於給定狀態（State爲枚舉類）。

我想出了這樣的查詢：

List<User> findAllByRoleContainsAndOrdersAssignedStateIsNullOrOrdersAssignedStateEquals(State state,Role role); 

，但它並不在所有的工作。這是複雜的，我從來沒有創建過這樣的查詢。你能幫助我嗎？非常感謝 ！

編輯： 的一段代碼：

@Entity 
public class User implements Persistable { 
........... 
@Column(name = "ROLES") 
@Enumerated(EnumType.STRING) 
@ElementCollection(targetClass = Role.class) 
private List<Role> role; 
.......... 
@OneToMany(fetch = FetchType.LAZY, mappedBy = "driver") 
private List<Order> ordersAssigned = new ArrayList<>(); 

} 
@Entity 
public class Order implements Persistable { 
........... 
@JoinColumn(name = "DRIVER_ID") 
@ManyToOne(fetch = FetchType.LAZY,cascade = CascadeType.PERSIST) 
private User driver; 

@Column(name = "STATE") 
@Enumerated(EnumType.STRING) 
private State state; 
............. 

} 

Answer 1

嘗試是這樣的：

@Entity 
public class User { 

    private String name; 

    @ElementCollection 
    @Column(name = "role") 
    private List<Role> roles = new ArrayList<>(); 

    @OneToMany(mappedBy = "user") 
    private List<Order> orders = new ArrayList<>(); 

    public User(String name, Role... roles) { 
     this.name = name; 
     this.roles.addAll(asList(roles)); 
    } 

    public enum Role { 
     ROLE1, ROLE2 
    } 
} 

@Entity 
public class Order { 

    private String title; 

    @ManyToOne 
    private User user; 

    private State state; 

    public enum State { 
     STATE1, STATE2 
    } 
} 

public interface UserRepository extends JpaRepository<User, Long> { 

    @Query("select distinct u from User u join u.orders o join u.roles r where r = ?1 and (o.state is null or o.state = ?2)") 
    List<User> getUsers(User.Role role, Order.State state); 
} 

工作example。

更多的信息是here和here。