Question

我使用的控制器中有一个更新功能：

public static Result updateCustomer(Long id) {
    Form<CustomerData> customerDataForm = form(CustomerData.class)
            .bindFromRequest();

    if (customerDataForm.hasErrors()) {
        return badRequest(views.html.admin.customerFormEdit
                .render(customerDataForm));
    }
    customerDataForm.get().update(id);
    flash("success", "Customer " + customerDataForm.get().customerName
            + " has been updated");
    return CLIENT_HOME;
}

但它不会保存空的输入文本值，甚至不会保存未选中的复选框。

当我选中一个复选框，或者在任何字段中输入任何值时，它会在更新时保存，但如果我想保存空输入或未选中复选框，则不会删除以前保存的更新值。

我该如何解决这个问题？

Answer 1

以下示例显示我们可以保存/更新输入的空值或勾选/不勾选复选框：

控制器：

public static Result editCustomer() {
    // find CustomerData, Note: this use hard coded ID
    CustomerData customerData = CustomerData.find.byId(1L); 
    Form<CustomerData> customerDataForm = Form.form(CustomerData.class)
        .fill(customerData);

    return ok(views.html.editCustomer.render(customerDataForm));
}

public static Result updateCustomer() {
    Form<CustomerData> customerDataForm = Form.form(CustomerData.class)
        .bindFromRequest();

    if (customerDataForm.hasErrors()) {
        return badRequest(editCustomer.render(customerDataForm));
    }
    CustomerData customerData = customerDataForm.get();

    // update data, Note: this use hard coded ID
    customerData.update(1L);
    flash("success", "Customer ID " + customerData.id + " has been updated");

    return redirect(routes.Application.editCustomer());
}

模型：

@Entity
public class CustomerData extends Model {
    @Id
    public Long id;
    public String name;
    public boolean isMember;

    public static Finder<Long, CustomerData> find = new Finder<>(
        Long.class, CustomerData.class
    );
}

观点：

@(customerDataForm: Form[models.CustomerData])
@import views.html.helper._

@main(title = "Edit Customer Data") {
    @form(routes.Application.updateCustomer()) {
        @*** Note: this use hard coded ID ***@
        <input type="hidden" name="id" value="1">
        @inputText(customerDataForm("name"), 'label -> "Customer Name")
        @checkbox(customerDataForm("isMember"))

        <input type="submit" value="Submit">
    }
}

希望这会有所帮助。 :)

播放框架2在空时保存输入字段

1 个答案:

控制器：

模型：

观点：