为什么我的网格显示实体字段-Vaadin 14

我有这些实体。

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Language {
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    
    @NotNull
    private String language;
}

以及

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Sentence {
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    
    @NotNull
    private String wordInFrench;
    
    @NotNull
    private String wordInOtherLanguage;
    
    @ManyToOne(cascade = CascadeType.ALL)
    @NotNull
    private Language language;
    
}

其目的是创建一个淹没式组合框,它使用以下代码:

@Route("addSentence")
@CssImport("./styles/shared-styles.css")
@CssImport(value = "./styles/vaadin-text-field-styles.css", themeFor = "vaadin-text-field")
public class AddSentenceView extends AppLayout {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    
    public AddSentenceView(SentenceService sentenceService, LanguageService languageService) {
        Top top = new Top();
        top.setTopAppLayout(this);
        
        // crud instance
        GridCrud<Sentence> crud = new GridCrud<>(Sentence.class);
                
        // grid configuration
        crud.getGrid().setColumns("wordInFrench", "wordInOtherLanguage", "language");
        crud.getGrid().setColumnReorderingAllowed(true);
        
        // form configuration
        crud.getCrudFormFactory().setUseBeanValidation(true);
        crud.getCrudFormFactory().setVisibleProperties("wordInFrench", "wordInOtherLanguage", "language");
        crud.getCrudFormFactory().setFieldProvider("language",
                new ComboBoxProvider<>("Language", languageService.findAll(), new TextRenderer<>(Language::getLanguage), Language::getLanguage));
        
        // layout configuration
        setContent(crud);
        
        // logic configuration
        crud.setOperations(
                () -> sentenceService.findAll(),
                sentence -> sentenceService.save(sentence),
                sentence -> sentenceService.save(sentence),
                sentence -> sentenceService.delete(sentence)
        );
        
    }

}

但结果是这样的。我只想看看属性 language . 不是 Language(id = 5, language = fikus") . 我该怎么做才能做到呢?

我用的是瓦丁14加积垢。 https://vaadin.com/directory/component/crud-ui-add-on