how to access properties passed to Ember Component inside a component-class?

问题

I have DECLARED an emberjs component in template as:

<script type="text/x-handlebars" id="components/custom-component">      
  <h4>The name of the object passed is : {{object.name}}</h4>
  {{#if show_details}}
    <p>The details of the object passed are : {{object.details}}</p>
  {{/if}}
</script>

Now I am USING this component in my html template as :

<script type="text/x-handlebars" data-template-name="index">
  <ul>
    {{#each object in model}}
      <li>{{custom-component object=object}}</li>
    {{/each}}
  </ul>
</script>

My component class for custom-component is as shown below :

App.CustomComponentComponent = Ember.Component.extend({
  show_details: function() {
      // return true or false based on the OBJECT's property (e.g. "true" if object.type is 'AUTHORIZED')
  },
});

Update

The way I achieved it is as follows :

App.CustomComponentComponent = Ember.Component.extend({
    show_details: function() {
      var object = this.get('object');
      if (object.type == "AUTHORIZED")
        return true;
      else
        return false;
    }
});

The parameters passed to the component class are available using it's get methods.

回答1:

It should work this way:

{{custom-component object_name=object}}

(you just used the wrong property name).

This should work if object is the object name. If name is a property of object then use object.name.

UPDATE

This should be straightforward. show_details should be defined as computed property depending on the object type:

App.CustomComponentComponent = Ember.Component.extend({
    object: null,
    show_details: function() {
      var object = this.get('object');
      if (object.get('type') === "AUTHORIZED")
         return true;
      else
         return false;
    }.property('object.type') 
});

or simpler:

App.CustomComponentComponent = Ember.Component.extend({
    show_details: function() {
      return this.get('object').get('type') === "AUTHORIZED";
    }.property('object.type') 
});

Don't forget to use get when accessing the properties of an Ember object.

来源：https://stackoverflow.com/questions/22956756/how-to-access-properties-passed-to-ember-component-inside-a-component-class

标签

ember.js

properties

components