How to fetch the dynamic attributes of the property in CollectionDatasource

Support
#1

Hi…
I am having dynamic attributes for an entity attribute(the entity attribute itself an entity). I have created the dynamic attributes for the attribute entity. When i tried to show the dynamic attributes of the attribute entity in the CollectionDataSource. The dynamic attributes are not showing in the table… I have also added visibility to the target screen…

How to show the dynamic attributes of the entity attribute in the table?

#3

Hi,

This scenario is not supported by the platform and is not recommended for use.
If you really need to display the dynamic attrubutes of related entities, you can use a workaround like the following.

For example, Order has the dynamic attribute priority. To display priority in Customer editor, add the generated column and load the attribute using LoadContext:

<table id="ordersTable"
       height="100px"
       width="200px">
    <columns>
        <column id="amount"/>
        <column id="priority"
                generator="generatePriorityCell"/>
    </columns>
    <rows datasource="ordersDs"/>
</table>

public class CustomerEdit extends AbstractEditor<Customer> {

    @Inject
    private DataManager dataManager;

    public Component generatePriorityCell(Order entity) {
        LoadContext loadContext  = new LoadContext(Order.class).setId(entity.getId());
        loadContext.setLoadDynamicAttributes(true);
        Entity orderEntity = dataManager.load(loadContext);
		return new Table.PlainTextCell(orderEntity.getValue("+priority"));
    }
}

But you should take into account that querying the database for each table row will affect badly the performance of your application.