Question

我正在寻找在 Thymeleaf 表单中管理一对多关系的解决方案。我正在运行 Spring Boot 和 Hibernate 。

我想在提交用户信息时发布我的子对象的值，该对象是地址类型，我不知道如何在百里香中绑定它。我还应该提醒一下，在目前的表单中，我只想在提交用户表单时添加一个地址值。我想做这样的事情：

<div class="form-group">
    <div class="col-sm-9">
        <input type="text" th:field="*{addresses[].address.addressDesc}" placeholder="Password" class="form-control" /> 
        <label th:if="${#fields.hasErrors('addresses')}" th:errors="*{addresses}" class="validation-message"></label>
    </div>
</div>

我的用户实体：

...

/** Field to store username */
@Column(name = "username", nullable = false, length = 45)
@NotEmpty(message = "*Please provide your name")
private String username;

/** Many to many relationship with address via user_address */
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "user_address", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "address_id"))
private Set<Address> addresses = new HashSet<Address>(0);

...

我的地址实体：

public class Address implements java.io.Serializable {

    /** Primary key address id */
    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "address_id", unique = true, nullable = false)
    private Integer addressId;

    /** Field to store actual address */
    @Column(name = "address_desc", nullable = false, length = 100)
    private String addressDesc;

    /** From Date for which the address was in use */
    @Temporal(TemporalType.DATE)
    @Column(name = "from_date", nullable = false, length = 10)
    private Date fromDate;

    /** Field to store the date till address was in use */
    @Temporal(TemporalType.DATE)
    @Column(name = "to_date", nullable = false, length = 10)
    private Date toDate;

    /** user_address entity mapping */
    @OneToMany(fetch = FetchType.LAZY, mappedBy = "address")
    private Set<UserAddress> userAddresses = new HashSet<UserAddress>(0);

    ...

}

有没有办法可以将它绑定到单个文本字段？

Answer 1

在addresses为Set时，实际上并没有很好的方法，因为无法引用Set内的特定项目。如果您可以改为使用List（或者在User和List之间添加额外的getter / setter，那么只需在输入上正确设置th:field。

th:field属性首先需要使用数组表示法addresses[0]引用列表中的第一项，然后您在该地址中使用addressDesc：

th:field="*{addresses[0].addressDesc}"

Answer 2

您必须像这样设置th:field：

<div th:each="address, iterstat: ${user.addresses}">
    <input th:field="*{addresses[__${iterstat.index}__].addressDesc}"/>
</div>

如何在Thymeleaf / Spring Boot post请求中添加子对象列表

2 个答案: