问题描述
我试图绑定一个对象从角控制元素到Dart中的Polymer元素。
I'm trying to bind an object from an Angular controlled element to a Polymer element in Dart.
要绑定的对象:
class Person {
String name;
String surname;
Person(this.name, this.surname);
}
聚合物元素模板:
<link rel="import" href="packages/polymer/polymer.html">
<polymer-element name="person-element">
<template>
<style>
.label {font-weight: bold;}
</style>
<p>
<span class="label">Name: </span>{{person.name}}
<span class="label">Surname: </span>{{person.surname}}
</p>
</template>
<script type="application/dart" src="person_element.dart"></script>
</polymer-element>
聚合物元素代码:
import 'package:polymer/polymer.dart';
import 'person.dart';
@CustomTag('person-element')
class PersonElement extends PolymerElement {
@published Person person;
PersonElement.created() : super.created();
}
在Angular中我创建了一个控制器和一个模块:
In Angular I've created a controller and a module:
@Controller(
selector: '[person-container]',
publishAs: 'ctrl')
class PersonController {
List<Person> persons = [new Person('John','Smith'), new Person('Mario','Rossi')];
}
class PersonModule extends Module {
PersonModule() {
bind(PersonController);
}
}
第一个解决方案正在使用包:
<div person-container ng-cloak>
<h2>Person elements</h2>
<div ng-repeat="person in ctrl.persons">
<div>{{person.name}}</div>
<person-element person="[[person]]"></person-element>
</div>
</div>
当我在Dartium中运行应用程序时出现错误:
When I run the application in Dartium I get this error:
Exception: type 'String' is not a subtype of type 'Person' of 'value'. (http://localhost:8080/person_element.dart:6)
以这种方式修改html代码中的属性实例化:
I've also tried to modify the attribute instantiation in the html code in this way:
<person-element person=[[person]]></person-element>
但是我也有同样的异常。
But I get the same exception.
angular_node_bind包支持对象绑定?
The angular_node_bind package supports the object binding?
第二个解决方案使用,并以这种方式绑定聚合物元素:
The second solution is using the new binding features of Angular 0.14.0 and binding the polymer element in this way:
使用这个解决方案我没有得到任何异常,元素是可视化的,但字段是空的, 。
With this solution I don't get any exception, the element is visualized but the fields are empty and the person instance null.
完整的示例如下:
推荐答案
新版本的AngularDart(0.14.0)支持Polymer-Dart绑定()。
目前,不同版本可能会有一些问题:
The new version of AngularDart (0.14.0) has a support for Polymer-Dart binding (http://blog.angulardart.org).At the moment there can be some problems with different versions:Pub get failed, [1] Resolving dependencies... Incompatible version constraints on code_transformers
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