[英]How to filter a @OneToMany mapped field in spring data JPA?
我正在嘗試使用 Spring Boot REST api 構建費用跟蹤器應用程序。 以下是我創建的實體類。
用戶 Model
@Entity
public class User{
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@NotBlank(message = "username is required !")
@Column(unique = true)
@Size(min = 10,max = 10,message = "username must be exactly 10 characters in length !")
private String username;
@Email(message = "Must be a valid Email !")
@NotBlank(message = "Email is required !")
@Size(min = 5, max = 256, message = "Email must be between 5 and 256 characters in length !")
private String email;
@NotBlank(message = "Password is required !")
@Size(min = 8 , message = "Password must be greater than 8 characters in length !")
private String password;
@NotBlank(message = "FirstName is required !")
@Size(min = 3 , max = 100 , message = "FirstName must be between 3 and 100 characters in length !")
private String firstName;
@NotBlank(message = "LastName is required !")
@Size(min = 3 , max = 100 , message = "LastName must be between 3 and 100 characters in length !")
private String lastName;
@OneToOne(cascade = CascadeType.ALL)
private Balance balance;
@OrderBy("createdAt DESC")
@OneToMany(fetch = FetchType.LAZY , cascade = CascadeType.ALL)
private List<Expense> expensesList;
@Temporal(TemporalType.TIMESTAMP)
private Date createdAt;
......
}
費用 Model
@Entity
@Table(name = "expense_tracker_expenses")
public class Expense {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@ManyToOne(fetch = FetchType.LAZY)
private User user;
@NotBlank(message = "Title is required !")
@Size(min = 3 , max = 60 , message = "Title must be between 3 and 8 characters !")
private String title;
@Size(max = 256, message = "Note must be less than 256 characters !")
private String note;
@DecimalMin(value = "0.0",message = "Amount cannot be less than 0.0 !")
private double amount;
@NotBlank(message = "Category is required !")
@Pattern(regexp = "Clothing|Entertainment|Food|Fuel|Health|Salary|Misc", message = "Invalid category !")
private String category;
@Temporal(TemporalType.TIMESTAMP)
private Date createdAt;
...
}
我創建了一個方法
public List<Expense> findByCreatedAtBetween(Date startCreatedAt,Date endCreatedAt);
獲取日期之間的費用列表,但它返回日期之間所有用戶的費用。
如何獲取某個用戶在開始日期和結束日期之間的費用列表?
有2種方法可以做
public List<Expense> findByUserAndCreatedAtBetween(User user,
Date startCreatedAt,
Date endCreatedAt);
user.getExpensesList().stream().filter(item ->
item.getCreatedAt().after(startDate) &&
item.getCreatedAt().before(endDate)
).collect(Collectors.toList());
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