Javascript 为什么绑定到另一个余烬对象不起作用？
我已经建立了一个简单的余烬绑定示例，我认为它应该可以工作： 为什么控制器的isTrue属性与模型的isTrue属性不同步？不寻找任何“把东西放在窗户上是不好的做法”之类的东西（除非这实际上是打破窗户的原因）；我在这里寻找理解 我的阅读使我确信它应该这样工作。有人能解释一下我可能解释错了什么吗 除非这是破坏它的真正原因 这就是破坏它的原因。绑定仅适用于Ember对象<代码>窗口不是余烬对象。路径错误也有一个问题，下面是一个图表：Javascript 为什么绑定到另一个余烬对象不起作用？,javascript,ember.js,Javascript,Ember.js,我已经建立了一个简单的余烬绑定示例，我认为它应该可以工作： 为什么控制器的isTrue属性与模型的isTrue属性不同步？不寻找任何“把东西放在窗户上是不好的做法”之类的东西（除非这实际上是打破窗户的原因）；我在这里寻找理解 我的阅读使我确信它应该这样工作。有人能解释一下我可能解释错了什么吗 除非这是破坏它的真正原因 这就是破坏它的原因。绑定仅适用于Ember对象窗口不是余烬对象。路径错误也有一个问题，下面是一个图表： if isTrueBinding is "appController.
if isTrueBinding is "appController.isTrue", This will:
this won't work
+--------------+ +--------------+
| | | |
+-------+| window |+-----+ | window |
| | | | | |
| +--------------+ | +--------------+
v v +
+---------------+ +--------------+ |
| appController | | mod | |
|---------------| |--------------| v
| isTrue | |isTrueBinding | +--------------+
| | | | | mod |
| | | | |--------------|
| | | | |isTrueBinding |
| | | | |appController |+---> +---------------+
| | | | | | | appController |
| | | | | | |---------------|
| | | | | | | isTrue |
+---------------+ +--------------+ | | | |
| | | |
| | | |
+--------------+ | |
| |
| |
i.e. bindings are implicitly pointing to "this", | |
unless they start with a capital letter. +---------------+
window.Currency = Em.Object.create({
"USD": "$"
});
App.MyObject = Em.Object.extend({
currencyBinding: "Currency.USD"
});
if isTrueBinding is "appController.isTrue", This will:
this won't work
+--------------+ +--------------+
| | | |
+-------+| window |+-----+ | window |
| | | | | |
| +--------------+ | +--------------+
v v +
+---------------+ +--------------+ |
| appController | | mod | |
|---------------| |--------------| v
| isTrue | |isTrueBinding | +--------------+
| | | | | mod |
| | | | |--------------|
| | | | |isTrueBinding |
| | | | |appController |+---> +---------------+
| | | | | | | appController |
| | | | | | |---------------|
| | | | | | | isTrue |
+---------------+ +--------------+ | | | |
| | | |
| | | |
+--------------+ | |
| |
| |
i.e. bindings are implicitly pointing to "this", | |
unless they start with a capital letter. +---------------+
window.Currency = Em.Object.create({
"USD": "$"
});
App.MyObject = Em.Object.extend({
currencyBinding: "Currency.USD"
});
if isTrueBinding is "appController.isTrue", This will:
this won't work
+--------------+ +--------------+
| | | |
+-------+| window |+-----+ | window |
| | | | | |
| +--------------+ | +--------------+
v v +
+---------------+ +--------------+ |
| appController | | mod | |
|---------------| |--------------| v
| isTrue | |isTrueBinding | +--------------+
| | | | | mod |
| | | | |--------------|
| | | | |isTrueBinding |
| | | | |appController |+---> +---------------+
| | | | | | | appController |
| | | | | | |---------------|
| | | | | | | isTrue |
+---------------+ +--------------+ | | | |
| | | |
| | | |
+--------------+ | |
| |
| |
i.e. bindings are implicitly pointing to "this", | |
unless they start with a capital letter. +---------------+
window.Currency = Em.Object.create({
"USD": "$"
});
App.MyObject = Em.Object.extend({
currencyBinding: "Currency.USD"
});
if isTrueBinding is "appController.isTrue", This will:
this won't work
+--------------+ +--------------+
| | | |
+-------+| window |+-----+ | window |
| | | | | |
| +--------------+ | +--------------+
v v +
+---------------+ +--------------+ |
| appController | | mod | |
|---------------| |--------------| v
| isTrue | |isTrueBinding | +--------------+
| | | | | mod |
| | | | |--------------|
| | | | |isTrueBinding |
| | | | |appController |+---> +---------------+
| | | | | | | appController |
| | | | | | |---------------|
| | | | | | | isTrue |
+---------------+ +--------------+ | | | |
| | | |
| | | |
+--------------+ | |
| |
| |
i.e. bindings are implicitly pointing to "this", | |
unless they start with a capital letter. +---------------+
window.Currency = Em.Object.create({
"USD": "$"
});
App.MyObject = Em.Object.extend({
currencyBinding: "Currency.USD"
});
然而，在Ember中，使用绑定绑定到全局对象并不是一种好的风格——最佳实践是使用依赖注入来访问共享对象。如果您发现自己需要使用全局绑定，这可能是您需要重构的标志。但是appController是一个ember对象吗？我没有绑定到Window的属性事实上，这甚至不是唯一被破坏的东西。绑定是相对于您在其中声明它们的对象的。因此，到
appController.isTrueappController.isTrueappController.isTrueappController.isTrue