Dart中Angular和Polymer之间的对象绑定 [英] Object binding between Angular and Polymer in Dart

问题描述

我正在尝试将对象从 Angular 受控元素绑定到 Dart 中的 Polymer 元素.

要绑定的对象:

class Person {字符串名称；字符串姓氏；人(this.name，this.surname)；}

高分子元素模板:

<聚合物元素名称="人物元素"><模板><风格>.label {字体粗细:粗体；}</风格><p><span class="label">姓名:</span>{{person.name}}<span class="label">姓氏:</span>{{person.surname}}</p><script type="application/dart" src="person_element.dart"></script></聚合物元素>

高分子元素代码:

import 'package:polymer/polymer.dart';导入person.dart"；@CustomTag('person-element')类 PersonElement 扩展了 PolymerElement {@published 人 人；PersonElement.created() : super.created();}

在 Angular 中，我创建了一个控制器和一个模块:

@Controller(选择器:'[人容器]'，发布为:'ctrl')类人控制器{列表<人>people = [new Person('John','Smith'), new Person('Mario','Rossi')];}类 PersonModule 扩展模块 {人模块(){绑定(人控制器)；}}

尝试的第一个解决方案是使用 angular_node_bind 包:

<h2>人物元素</h2><div ng-repeat="person in ctrl.persons"><div>{{person.name}}</div><person-element person="[[person]]"></person-element>

当我在 Dartium 中运行应用程序时，出现此错误:

异常:String"类型不是value"的Person"类型的子类型.(http://localhost:8080/person_element.dart:6)

我也试过这样修改html代码中的属性实例化:

</person-element>

但我得到了同样的例外.

angular_node_bind 包是否支持对象绑定?

第二种解决方案是使用 Angular 0.14.0 的新绑定特性 并以这种方式绑定聚合物元素:

使用这个解决方案，我没有得到任何异常，元素是可视化的，但字段为空，人员实例为空.

完整示例在这里:https://github.com/fedy2/dart-angular-polymer-object-data-binding

解决方案

新版 AngularDart (0.14.0) 支持 Polymer-Dart 绑定 (http://blog.angulardart.org).目前，不同版本可能存在一些问题:发布失败，[1] 解决依赖项... code_transformers 上的版本约束不兼容

I'm trying to bind an object from an Angular controlled element to a Polymer element in Dart.

The object to bind:

class Person {
  String name;
  String surname;

  Person(this.name, this.surname);
}

The polymer element template:

<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>

The polymer element code:

import 'package:polymer/polymer.dart';
import 'person.dart';

@CustomTag('person-element')
class PersonElement extends PolymerElement {
  @published Person person;

  PersonElement.created() : super.created();
}

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);
  }
}

The first solution tried is using the angular_node_bind package:

<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> 

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)

I've also tried to modify the attribute instantiation in the html code in this way:

<person-element person=[[person]]></person-element>

But I get the same exception.

The angular_node_bind package supports the object binding?

The second solution is using the new binding features of Angular 0.14.0 and binding the polymer element in this way:

With this solution I don't get any exception, the element is visualized but the fields are empty and the person instance null.

The complete example is here: https://github.com/fedy2/dart-angular-polymer-object-data-binding

解决方案

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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