Filter abort apply

Support
#1

Hi,
Wich way to prevent filter apply if some condition properties value on filter was wrong?

In cuba we can do it by event beforeFilterAppliedHandler. But now?

regards

gabriel

#3

Hi,

You can use the PreLoadEvent of the DataLoader.

Something like this:

import com.company.extendreportscreen.entity.User;
import io.jmix.core.querycondition.Condition;
import io.jmix.core.querycondition.LogicalCondition;
import io.jmix.core.querycondition.PropertyCondition;
import io.jmix.ui.Notifications;
import io.jmix.ui.component.Filter;
import io.jmix.ui.model.CollectionLoader;
import io.jmix.ui.navigation.Route;
import io.jmix.ui.screen.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;


@UiController("User.browse")
@UiDescriptor("user-browse.xml")
@LookupComponent("usersTable")
@Route("users")
public class UserBrowse extends StandardLookup<User> {

    @Autowired
    private Filter filter;

    @Autowired
    private Notifications notifications;

    @Subscribe(id = "usersDl", target = Target.DATA_LOADER)
    public void onUsersDlPreLoad(CollectionLoader.PreLoadEvent<User> event) {
        Filter.Configuration currentConfiguration = filter.getCurrentConfiguration();
        LogicalCondition queryCondition = currentConfiguration.getQueryCondition();
        for (Condition condition : queryCondition.getConditions()) {
            if (condition instanceof PropertyCondition propertyCondition) {
                String property = propertyCondition.getProperty();
                if ("username".equals(property)) {
                    String value = (String) propertyCondition.getParameterValue();
                    if (value != null && value.startsWith("a")) {
                        notifications.create(Notifications.NotificationType.WARNING)
                                .withCaption("I will not filter for usernames starting with 'a' letter")
                                .show();
                        event.preventLoad();
                    }
                }
            }
        }
    }
}