我在后端加载网格数据并在聚合物模板中创建列时遇到问题。列数正确,但不会显示任何数据。我真的会使用排序和过滤功能的 vaadin-grid-column 功能。有什么我错过的吗?我用 vaadin 12 和 13 试过。我也用 Spring-boot 2.1.0.RELEASE
订单列表视图.kt
@Tag("orderlist-view")
@HtmlImport("src/views/orders/orderlist-view.html")
@Route(CommanderConst.PAGE_ORDERS, layout = MainView::class)
class OrderListView(
var orderGridDataProvider: OrderGridDataProvider
) : PolymerTemplate<TemplateModel>(), BeforeEnterObserver {
@Id("orderGrid")
private lateinit var orderGrid: Grid<OrderDTO>
override fun beforeEnter(event: BeforeEnterEvent?) {
orderGrid.dataProvider = orderGridDataProvider
}
}
orderlist-view.html:
<link rel="import" href="../../../bower_components/polymer/polymer-element.html">
<link rel="import" href="../../../bower_components/vaadin-grid/vaadin-grid.html">
<link rel="import" href="../../../bower_components/vaadin-grid/vaadin-grid-column.html">
<link rel="import" href="../../../bower_components/vaadin-grid/vaadin-grid-filter.html">
<link rel="import" href="order-card.html">
<dom-module id="orderlist-view">
<template>
<vaadin-grid id="orderGrid" theme="no-row-borders" data-provider='{{myOrders}}'>
<vaadin-grid-column>
<template class="header">#</template>
<template>[[index]]</template>
</vaadin-grid-column>
<vaadin-grid-column>
<template class="header">id</template>
<template>[[item.id]]</template>
</vaadin-grid-column>
</vaadin-grid>
</template>
<script>
class OrderListView extends Polymer.Element {
static get is() {
return 'orderlist-view';
}
static get properties() {return {
myOrders:{
type:Array
observer: '_myOrders'
}
}}
_myOrders(o) {console.log(o);}
}
window.customElements.define(OrderListView.is, OrderListView);
</script>
</dom-module>
但是如果我使用 TemplateRenderer 并在那里只有一些 div 数据将显示:
orderGrid.addColumn(TemplateRenderer.of<OrderDTO>(
"<order-show"
+ " header='[[item.header]]'"
+ " order='[[item.order]]'>"
+ "</order-show>")!!
.withProperty("order") { order -> order }
.withProperty("header") { order -> order.id }
)
订单显示.html:
<dom-module id="order-show">
<template>
<div>
<span>[[header]]</span>
</div>
<div>
<h3>[[order.id]]</h3>
<template is="dom-repeat" items="[[order.orderItems]]">
<div>
<span>[[item.quantity]]</span>
</div>
</template>
</div>
</template>
<script>
class OrderCard extends Polymer.Element {
static get is() {
return 'order-show';
}
}
window.customElements.define(OrderCard.is, OrderCard);
</script>
</dom-module>