我有多个组件的布局(4个textFields和2个组合框)。 这是如何定义的:
private ManufacturerRepository manRepo;
InteriorDoor interiorDoor;
Manufacturer manufacturer;
ComponentHelper componentHelper;
@PropertyId("width")
private TextField widthField;
@PropertyId("height")
private TextField heightField;
@PropertyId("thickness")
private TextField thicknessField;
@PropertyId("modelName")
private TextField modelName;
@PropertyId("hasGlass")
private ComboBox glassCombo;
@PropertyId("manufacturerId")
private ComboBox manCombo;
private BeanItemContainer<Manufacturer> beanItemContainer;
beanItemContainer
用于从数据库中获取数据:
beanItemContainer = new BeanItemContainer<>(Manufacturer.class, manRepo.findAll());
manCombo.setContainerDataSource(beanItemContainer);
不介意glassCombo
,因为它具有常量数据,并且绑定在那里很有效。
这是我绑定字段的方式:
// binding data to fields
BeanFieldGroup binder = new BeanFieldGroup<>(InteriorDoor.class);
binder.setItemDataSource(interiorDoor);
binder.setBuffered(false);
binder.bindMemberFields(this);
到目前为止一切都那么好,但是当布线字段发生时,问题就出现了manCombo
- 从组合框中选择项目时,我收到了这个
引起:com.vaadin.data.util.converter.Converter $ ConversionException:无法将值转换为Long 在com.vaadin.ui.AbstractField.convertToModel(AbstractField.java:778)〜[vaadin-server-7.7.5.jar:7.7.5] 在com.vaadin.ui.AbstractField.convertToModel(AbstractField.java:755)〜[vaadin-server-7.7.5.jar:7.7.5] 在com.vaadin.ui.AbstractField.setValue(AbstractField.java:539)〜[vaadin-server-7.7.5.jar:7.7.5] ...省略了49个常用帧 引起:com.vaadin.data.util.converter.Converter $ ConversionException:无法将类型.domain.Manufacturer的值转换为模型类型类java.lang.Long。没有设置转换器且类型不兼容。 在com.vaadin.data.util.converter.ConverterUtil.convertToModel(ConverterUtil.java:182)〜[vaadin-server-7.7.5.jar:7.7.5] 在com.vaadin.ui.AbstractField.convertToModel(AbstractField.java:775)〜[vaadin-server-7.7.5.jar:7.7.5] ...省略了51个常见帧
请帮忙
P.S我试图施放为(((Manufacturer).getValue).getId()
,但它没有效果
更新1
@Marco C解决方案不起作用。现在,在调用布局时,我会收到:
java.lang.NullPointerException:null at java.lang.Class.isAssignableFrom(Native Method)〜[na:1.8.0_121] at com.vaadin.data.util.converter.ConverterUtil.canConverterPossiblyHandle(ConverterUtil.java:243) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.vaadin.ui.AbstractField.setPropertyDataSource(AbstractField.java:649) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.vaadin.data.fieldgroup.FieldGroup.bind(FieldGroup.java:272) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.vaadin.data.fieldgroup.BeanFieldGroup.bind(BeanFieldGroup.java:155) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.vaadin.data.fieldgroup.FieldGroup.buildAndBindMemberFields(FieldGroup.java:1011) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.vaadin.data.fieldgroup.FieldGroup.bindMemberFields(FieldGroup.java:856) 〜[vaadin-server-7.7.5.jar:7.7.5] at com.reborn.doorshop.ui.components.InteriorEditor.editEntity(InteriorEditor.java:156) 〜[classes /:na] at com.reborn.doorshop.ui.views.InteriorView.lambda $ $的initComponents $ 61446b05 1(InteriorView.java:53) 〜[classes /:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 方法)〜[na:1.8.0_121] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
UPDATE2:
manCombo.setConverter(new Converter<Object, Long>() {
@Override
public Long convertToModel(Object value, Class<? extends Long> targetType, Locale locale)
throws ConversionException {
if (value == null) {
return null;
}
return ((Manufacturer)value).getId();
}
@Override
public Object convertToPresentation(Long value, Class<?> targetType, Locale locale)
throws ConversionException {
if (value == null) {
return null;
}
return beanItemContainer.getItemIds().stream().filter( m -> value.equals(m.getId()))
.findFirst().orElse(null);
}
@Override
public Class<Long> getModelType() {
return null;
}
@Override
public Class<Object> getPresentationType() {
return null;
}
});
答案 0 :(得分:1)
您可以实施转换器制造商 - &gt;长并将其设置在组合框上
$user->active_profile