I create valueCollectionDatasource which return sum of amount. Query below
select COALESCE(sum(c.destinationDocument.brutto),0) as settled
from demo$amountConnector c
where c.sourceDocument.id=:ds$xxxCreatorParamsDs.document.id
This datasource depend on other dataSource xxxCreatorParamsDs
Now I’d set result settled to field in editWindow. I try set datasource parameter for settled field.
I check datasource return correctly values. How can I set result from sumDS datasource to column in xxxCreatorParamsDs datasource. Maybe there is other way for realize this case.
The value datasources/data containers contain instances of KeyValueEntity which is an entity with attributes defined at runtime, in <properties> element of the datasource. So you can bind the visual components to these attributes as to regular entities/attributes.
First, let’s define the value data container and the field bound to it in order-browse.xml:
<window xmlns="http://schemas.haulmont.com/cuba/screen/window.xsd" ...>
<data readOnly="true">
<collection id="ordersDc" class="com.company.sales.entity.Order" view="order-with-customer">
<loader id="ordersDl">
<query>
<![CDATA[select e from sales_Order e]]>
</query>
</loader>
</collection>
<keyValueInstance id="orderAmountDc">
<loader id="orderAmountDl">
<query>select sum(e.quantity * e.product.price) from sales_OrderLine e where e.order = :order</query>
</loader>
<properties>
<property name="amount" datatype="decimal"/>
</properties>
</keyValueInstance>
</data>
<layout expand="ordersTable"
spacing="true">
...
<groupTable ...>
...
<buttonsPanel ...>
...
<textField id="amountField" inputPrompt="Amount of the selected order"
dataContainer="orderAmountDc" property="amount"/>
</buttonsPanel>
</groupTable>
After that, change OrderBrowse controller as follows:
@UiController("sales_Order.browse")
@UiDescriptor("order-browse.xml")
@LookupComponent("ordersTable")
// notice there is no @LoadDataBeforeShow annotation
public class OrderBrowse extends StandardLookup<Order> {
@Inject
private CollectionLoader<Order> ordersDl;
@Inject
private KeyValueInstanceLoader orderAmountDl;
@Subscribe
private void onBeforeShow(BeforeShowEvent event) {
// load orders list right before screen opening
ordersDl.load();
}
@Subscribe(id = "ordersDc", target = Target.DATA_CONTAINER)
private void onOrdersDcItemChange(InstanceContainer.ItemChangeEvent<Order> event) {
// load order amount each time an order is selected
orderAmountDl.setParameter("order", event.getItem());
orderAmountDl.load();
}
}
Demo:
As for datasources, there is no direct counterpart to keyValueInstance container, so you should use ValueCollectionDatasource and set the first loaded item in it after refreshing.
