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EmberJS 路由器刷新模型

2018-01-04 11:39 更新

描述

如果模型中的数据被更新，Ember.js将定期刷新以显示更新的值。控制器可以向路线发送动作。调用路由的刷新方法将再次重新执行模型挂钩。

语句

refresh()

例子

<!DOCTYPE html>
<html>
   <head>
      <title>Emberjs Refreshing your Model</title>
      <!-- CDN's -->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.1/handlebars.min.js"></script>
      <script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.10.0/ember.min.js"></script>
      <script src="https://builds.emberjs.com/tags/v1.10.0-beta.3/ember-template-compiler.js"></script>
      <script src="https://builds.emberjs.com/release/ember.debug.js"></script>
      <script src="https://builds.emberjs.com/beta/ember-data.js"></script>
   </head>
   <body>
      <script type="text/x-handlebars">
         {{outlet}}
      </script>

      <script type="text/x-handlebars" data-template-name="index">
         <h2>Information</h2>
         <!-- loop over the JSON data -->
         {{#each pr in model}}
            <p><b>Created at</b>: {{pr.created_at}}</p>
            <p><b>Title</b>: {{pr.title}}</p>
         {{/each}}
         <a href="#" {{action "getLatest"}}><i>Refresh the model</i></a>
      </script>

      <script type="text/javascript">
         App = Ember.Application.create();

         App.IndexRoute = Ember.Route.extend({
            model: function() {
               var url = 'https://api.github.com/repos/emberjs/ember.js/pulls';
               //get the JSON values from the specified url
               return Ember.$.getJSON(url).then(function(data) {
                 //adds the data to/from an array. splice(0,2) is the number of items to be displayed: is 2
                 return data.splice(0, 3);
               });
            },
            actions: {
               invalidateModel: function() {
                  //display message in the console of your browser
                  Ember.Logger.log('Route is now refreshing...');
                 //refresh the model
                  this.refresh();
               }
            }
         });

         App.IndexController = Ember.Controller.extend({
            actions: {
               getLatest: function() {
                  //display message in the console of your browser
                  Ember.Logger.log('Controller requesting route to refresh...');
                  this.send('invalidateModel');
               }
            }
         });
      </script>
   </body>
</html>

输出

让我们执行以下步骤，看看上面的代码如何工作：

将上面的代码保存在routing_rfrsh_mod.html文件中
在浏览器中打开此HTML文件。

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