如果我没有使用自定义元素,我在将模型绑定到表时遇到问题。 自定义元素工作正常,但是当我尝试手动绑定模型而不创建自定义组件时,不会显示任何数据。任何想法?
custom_table.html
<!DOCTYPE html>
<html>
<body>
<polymer-element name="custom-table" extends="div" apply-author-styles>
<template>
<table>
<tbody>
<tr template repeat="{{people}}">
<td>{{firstName}}</td>
<td>{{lastName}}</td>
</tr>
</tbody>
</table>
</template>
<script type="application/dart" src="custom_table.dart"></script>
</polymer-element>
</body>
</html>
custom_table.dart
import 'package:polymer/polymer.dart';
class Person {
String firstName;
String lastName;
Person(this.firstName, this.lastName);
}
@CustomTag('custom-table')
class CustomTable extends PolymerElement with ObservableMixin {
List people = [new Person('Bob', 'Smith'), new Person('Alice', 'Johnson')];
}
没有自定义元素版本:
polymer_test.html
<!DOCTYPE html>
<head>
<script src="packages/polymer/boot.js"></script>
</head>
<html>
<head>
<meta charset="utf-8">
<title>Polymer test</title>
<link rel="stylesheet" href="polymer_test.css">
</head>
<body>
<h1> Table test </h1>
<template id="tableTemplate" repeat>
<table>
<tbody>
<tr template repeat="{{ people }}">
<td>{{firstName}}</td>
<td>{{lastName}}</td>
<tr>
</tbody>
</table>
</template>
<script type="application/dart" src="polymer_test.dart"></script>
</body>
</html>
polymer_test.dart
import 'dart:html';
import 'package:polymer/polymer.dart';
import 'package:fancy_syntax/syntax.dart';
class Person {
String firstName;
String lastName;
Person(this.firstName, this.lastName);
}
class Message extends Object with ObservableMixin {
List<Person> people = toObservable([new Person('Bob', 'Smith'), new Person('Alice', 'Johnson')]);
}
main() {
var msgModel = new Message();
TemplateElement template = query('#tableTemplate');
template.bindingDelegate = new FancySyntax();
template.model = msgModel;
}
答案 0 :(得分:1)
将此添加到main是否有帮助?
void main() {
initPolymer([], () {
// put existing main code in here
});
}
polymer / boot.js应该这样做,但我认为现在它没有踢,除非页面至少有一个聚合物元素(这是一个错误)。
或者,您可以在HTML中添加一个虚拟<polymer-element>
。这将解决问题。
答案 1 :(得分:0)
绑定属性。相反,我错误地使用了重复。 它应该是:
<template id="tableTemplate" bind>
而不是:
<template id="tableTemplate" repeat>
答案 2 :(得分:0)
你能试试吗
templateBind(query('#tableTemplate'))
..bindingDelegate = new FancySyntax()
..model = msgModel;
请参阅http://api.dartlang.org/docs/releases/latest/template_binding.html#templateBind