春季数据异常查询

Question

我对春季数据查询有问题。我想要接收用户已赋予角色的用户（列表）（角色在列表中）并且此用户（列表）的assignedOrders为空或此订单处于给定状态（State为枚举类）。

我想出了这样的查询：

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

，但它并不在所有的工作。这是复杂的，我从来没有创建过这样的查询。你能帮助我吗？非常感谢 ！

编辑： 的一段代码：

@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

尝试是这样的：

@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。