我有屏幕和屏幕控制器。屏幕上有两个lookupPickerField
组件。
一个简单的任务 - 当第一个(PK)中的值发生变化时,第二个应该加载依赖值(FK)。
我的屏幕描述符:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<window xmlns="http://schemas.haulmont.com/cuba/window.xsd"
caption="msg://editCaption"
class="com.tkbbank.client.web.item.CardItemEdit"
datasource="cardItemDs"
focusComponent="fieldGroup"
messagesPack="com.tkbbank.client.web.item">
<dsContext>
<datasource id="cardItemDs" class="com.tkbbank.client.entity.CardItem" allowCommit="false"/>
<collectionDatasource id="cardTypeDs" class="com.tkbbank.client.entity.CardType" view="_local">
<query>
<![CDATA[select e from demo$CardType e]]>
</query>
</collectionDatasource>
<collectionDatasource id="cardSubTypeDs" class="com.tkbbank.client.entity.CardSubType" view="_local">
<query>
<![CDATA[select s from demo$CardSubType s where s.cardType.id = :component$cardSubTypePicker.id]]>
</query>
</collectionDatasource>
</dsContext>
<dialogMode forceDialog="true" width="AUTO"/>
<layout expand="windowActions" spacing="true">
<fieldGroup id="fieldGroup" datasource="cardItemDs">
<column width="500px">
<field id="cardType" caption="Тип документа">
<lookupPickerField id="cardTypePicker" optionsDatasource="cardTypeDs"/>
</field>
<field id="cardSubType" caption="Подтип документа">
<lookupPickerField id="cardSubTypePicker" optionsDatasource="cardSubTypeDs"/>
</field>
// Skipped
我的屏幕控制器:
public class CardItemEdit extends AbstractEditor<CardItem> {
@Inject
private Datasource<CardItem> cardItemDs;
@Inject
private Metadata metadata;
@Inject
private CollectionDatasource<CardSubType, UUID> cardSubTypeDs;
@Inject
private LookupPickerField cardTypePicker;
@Override
public void init(Map<String, Object> params) {
CardItem cardItem = metadata.create(CardItem.class);
cardItemDs.setItem(cardItem);
cardTypePicker.addValueChangeListener(e -> cardSubTypeDs.refresh());
}
}
实体CardSubType
:
@NamePattern("Подтип входящего документа: %s |subtype")
@Table(name = "DEMO_CARD_SUB_TYPE")
@Entity(name = "demo$CardSubType")
public class CardSubType extends StandardEntity {
private static final long serialVersionUID = -3558412722346178348L;
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "CARD_TYPE_ID")
protected CardType cardType;
// Skipped
因此,我在 中选择了一个值cardTypePicker
,但第二个组件仍然为空。两个表都有数据。
可能是什么问题呢?
我将非常感谢您提供的信息。谢谢大家。