休眠查询一对多，在列表中传递外键

Question

这是我的休眠映射文件：

<class name="com.cms.entity.ContentPartnerMaster" table="BFContentPartnerMaster">
<!-- <cache include="non-lazy" usage="read-only"/> -->
<id name="partnerId" type="int" column="Id">
<generator class="native" />
</id>
<property name="partnerName" column="PartnerName" type="string" />
<property name="partnerDescription" column="PartnerDescription"
type="string" />
<property name="isActive" column="isActive" type="boolean" />
<property name="partnerSalt" column="PartnerSalt" type="string" />
<bag name="carousels" table="BFCaraousal" inverse="true" lazy="true"
fetch="select">
<key>
<column name="Id" not-null="true" />
</key>
<one-to-many class="com.cms.entity.Carousel" />
</bag>
</class>
<class name="com.cms.entity.Carousel" table="BFCaraousal">
<id name="caraousalId" type="int" column="CaraousalId">
<generator class="native" />
</id>
<property name="section" column="Section" type="string" />
<property name="caraousalName" column="CaraousalName" type="string" />
<property name="dateModified" column="DateModified" type="date" />
<property name="dateAdded" column="DateAdded" type="date" />
<property name="addedBy" column="AddedBy" type="int" />
<property name="countryId" column="countryid" type="int" />
<property name="partnerId" column="PartnerId" type="int" />
</class>

这是我的代码：

public class ContentPartnerMaster implements Serializable {
private static final long serialVersionUID = 1L;
private int partnerId;
private String partnerName;
private String partnerDescription;
private Boolean isActive;
private String partnerSalt;
private ArrayList<Carousel> carousels;
// getter setter ..

public class Carousel implements Serializable {
private static final long serialVersionUID = 1L;
private Integer caraousalId;
private Integer partnerId;
private Integer countryId;
private String section;
private String caraousalName;
private Integer addedBy;
private Date dateAdded;
private Date dateModified;

休眠查询一对多，列表中有外键传递

它抛出错误，如 id 非法参数异常在调用com.cms.entity.ContentPartnerMaster.carousels的 setter 时发生

Answer 1

尝试使用 Set<> 而不是 ArrayList。

public class ContentPartnerMaster implements Serializable { ... private Set<Carousel> carousels;

稍后使用它时，您可以将其转换为 List<>。