Question

我有以下抽象类：

public abstract class Person extends Model {
private Serializable id;
private String name;
private Integer year;
private String nationality;
private String deathYear;

@Override
protected Serializable getId() {
    return id;
}

@Override
protected Model byId() {
    return null;
}

public String getName() {
    return name;
}

public abstract void add();

public abstract void update();

public abstract void delete();

public abstract String getDeathYear();

public abstract int getYear();

public abstract String getNationality();

public abstract List<Book> getBooks();

}

以下类扩展了它：

public class Author extends Person {

private Serializable id;
private String name;
private Integer year;
private String nationality;
private String deathYear;
private List<Prize> prizes;
private List<Book> books;

public Author() {

}

@Override
public String getNationality() {
    return nationality;
}

@Override
public String getName() {
    return name;
}

@Override
public int getYear() {
    return year;
}

@Override
public String getDeathYear() {
    return deathYear;
}

@Override
public List<Book> getBooks() {
    return books;
}

public List<Prize> getPrizes() {
    return prizes;
}

public void setName(String name) {
    this.name = name;
}//plus some unrelated stuff

我正在尝试创建一个这样的表单：

public class AdminAuthorPage extends AdminBasePage {
Author inputAuthor;

public AdminAuthorPage() {
    this(new Author());
}

public AdminAuthorPage(Author author) {
    this.inputAuthor = author;

    this.add(new ListView<Author>("authorList", Author.all()) {
        @Override
        protected void populateItem(ListItem<Author> item) {
            final Author author = item.getModelObject();
            item.add(new PersonLink("authorLink", author));
            item.add(new Link("editLink") {
                @Override
                public void onClick() {
                    setResponsePage(new AdminAuthorPage(author));
                }
            });
            item.add(new Link("deleteLink") {
                @Override
                public void onClick() {
                    author.delete();
                    setResponsePage(new AdminAuthorPage());
                }
            });
        }

    });

    Form authorForm = new Form("authorForm", new CompoundPropertyModel(
            this.inputAuthor));
    authorForm.add(new RequiredTextField<String>("name"));
    //....

然而，当我浏览相应的页面时，我收到以下错误：

 Last cause: null
 WicketMessage: 
 Error attaching this container for rendering: [Form
 [Component id = authorForm]]

据我所知，当CompoundPropertyModel的类型（在这种情况下是作者）时会发生此错误找不到所需的吸气剂。

但是，似乎我的代码已经为name属性定义了getter方法。

Answer 1

我认为你误解了模型的概念。你的人类不应该扩展模型，它应该是标准的pojo。你要声明模型对你的pojo是通用的。

MyPage extends GenericWebPage<Author> {

  public MyPage(IModel<Author> model) {
    super(model);
  }

}

将wicket CompoundPropertyModel与抽象类一起使用

1 个答案: