I have the screen and the screen controller. There are two lookupPickerField components on the screen.
A simple task - when the value in the first of them (PK) changes, in the second one should be loaded dependent values (FK).
Descriptor of my screen:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<window xmlns="http://schemas.haulmont.com/cuba/window.xsd"
caption="msg://editCaption"
class="com.client.web.item.CardItemEdit"
datasource="cardItemDs"
focusComponent="fieldGroup"
messagesPack="com.client.web.item">
<dsContext>
<datasource id="cardItemDs" class="com.client.entity.CardItem" allowCommit="false"/>
<collectionDatasource id="cardTypeDs" class="com.client.entity.CardType" view="_local">
<query>
<![CDATA[select e from demo$CardType e]]>
</query>
</collectionDatasource>
<collectionDatasource id="cardSubTypeDs" class="com.client.entity.CardSubType" view="_local">
<query>
<![CDATA[select s from demo$CardSubType s where s.cardType.id = :component$cardSubTypePicker.id]]>
</query>
</collectionDatasource>
</dsContext>
<dialogMode forceDialog="true" width="AUTO"/>
<layout expand="windowActions" spacing="true">
<fieldGroup id="fieldGroup" datasource="cardItemDs">
<column width="500px">
<field id="cardType" caption="Тип документа">
<lookupPickerField id="cardTypePicker" optionsDatasource="cardTypeDs"/>
</field>
<field id="cardSubType" caption="Подтип документа">
<lookupPickerField id="cardSubTypePicker" optionsDatasource="cardSubTypeDs"/>
</field>
// Skipped
Controller of my screen:
public class CardItemEdit extends AbstractEditor<CardItem> {
@Inject
private Datasource<CardItem> cardItemDs;
@Inject
private Metadata metadata;
@Inject
private CollectionDatasource<CardSubType, UUID> cardSubTypeDs;
@Inject
private LookupPickerField cardTypePicker;
@Override
public void init(Map<String, Object> params) {
CardItem cardItem = metadata.create(CardItem.class);
cardItemDs.setItem(cardItem);
cardTypePicker.addValueChangeListener(e -> cardSubTypeDs.refresh());
}
}
Entity CardSubType:
@NamePattern("Подтип входящего документа: %s |subtype")
@Table(name = "DEMO_CARD_SUB_TYPE")
@Entity(name = "demo$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
So, I select a value in the cardTypePicker, but the second component remains empty. Both tables have the data.
What could be the problem?
I would be very grateful for the information. Thanks to all.