Vaadin - 行修改后刷新网格 [英] Vaadin - Refresh grid after row modification

问题描述

我使用数据库中的数据创建简单网格：

I create simple grid with data from database:

BeanItemContainer<Customer> container = new BeanItemContainer<>(Customer.class, customerRepository.findAll());
Grid grid = new Grid(container);

要编辑按钮的每一行：

Button edit = new Button("Edit", clickEvent -> openWindow((Customer) grid.getSelectedRows().iterator().next()));

这个打开的新窗口带有编辑表格。接受所有更改后，我必须手动刷新整个页面以查看Grid上的修改。我的问题是：

This open new window with edit form. After all changes accepted, I must manually refresh whole page to see modification on Grid. My question is:

修改任何行条目后如何刷新网格？
以及如何将这些修改保存到数据库（也许beanItemContainer可以做到）？

How refresh only Grid after modification of any row entry? And how save those modifications to database (maybe beanItemContainer could do it)?

推荐答案

这是一个错误。在底层容器中进行更改后，Grid不会自行更新，也没有任何合理的刷新方法。围绕这个问题有几个黑客，即

It's a bug. Grid doesn't update itself after changes were done in underlying container nor has any reasonable method to refresh. There are several hacks around this issue i.e.

grid.clearSortOrder();

或

grid.setEditorEnabled(true);
grid.setEditorEnabled(false);

SSCCE：

TextField text =  new TextField("Edit");
Grid grid;
BeanItemContainer<Customer> container;

@Override
protected void init(VaadinRequest request) {
    final VerticalLayout layout = new VerticalLayout();
    container = new BeanItemContainer<>(Customer.class, Arrays.asList(new Customer("1"), new Customer("2")));
    grid = new Grid(container);
    Button open = new Button("open");
    open.addClickListener(this :: openListener);
    Button save = new Button("save");
    save.addClickListener(this :: saveListener);
    layout.addComponents(grid, open, save, text);
    setContent(layout);
}

private void openListener(Button.ClickEvent clickEvent){
    text.setValue(((Customer) (grid.getSelectedRow())).getName());
}
private void saveListener(Button.ClickEvent clickEvent){
    Customer c = (Customer) grid.getSelectedRow();
    c.setName(text.getValue());
    grid.clearSortOrder();
}

可能重复使用一组新数据更新网格，在Vaadin 7.4应用程序中

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