te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Handlebar helper inside {{#each}} - Stack Overflow

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    javascript - Handlebar helper inside {{#each}} - Stack Overflow

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    I try to call a registered handlebar helper inside a {{#each}} loop. Unfortunately Ember.js plains because it tries to resolve the helper as a property of the controller rather than a helper.

    Handlebars.registerHelper('testHelper', function(name) {
    return 'foo: ' + name
});

    (names and content are just dummy values to show the example)

    {{#each entry in App.testController}}
   <div>{{{testHelper entry.name}}}</div>
{{/each}}

    The error that the Ember.js prints is:

    Uncaught Error:  Handlebars error: Could not find property 'testHelper' on object <App.testController:ember254>.

    How do I need to call the registered helper so that it gets recognized?

    I try to call a registered handlebar helper inside a {{#each}} loop. Unfortunately Ember.js plains because it tries to resolve the helper as a property of the controller rather than a helper.

    Handlebars.registerHelper('testHelper', function(name) {
    return 'foo: ' + name
});

    (names and content are just dummy values to show the example)

    {{#each entry in App.testController}}
   <div>{{{testHelper entry.name}}}</div>
{{/each}}

    The error that the Ember.js prints is:

    Uncaught Error:  Handlebars error: Could not find property 'testHelper' on object <App.testController:ember254>.

    How do I need to call the registered helper so that it gets recognized?

    • javascript
    • ember.js
    • handlebars.js
    Share Improve this question edited Sep 11, 2012 at 9:45 Mike Aski 9,2364 gold badges47 silver badges66 bronze badges asked Sep 11, 2012 at 9:39 ritrit 2,3083 gold badges19 silver badges27 bronze badges
    Add a ment  | 

    3 Answers 3

    Reset to default 9

    Got it running, either with this solution,

    Javascript

    Handlebars.registerHelper('testHelper', function(property, options) {
  return 'foo: ' + Ember.get(options.data.view.content, property);
});

    Handlebars template

    <script type="text/x-handlebars" data-template-name='app-view'>
  <ul>
  {{#each entry in content}}
    <li>{{testHelper name}}</li>
  {{/each}}
  </ul>
</script>​

    Or even better, with this one:

    Javascript

    Handlebars.registerHelper('testHelper', function(property) {
  return 'foo: ' + Ember.get(this, property);
});

    Handlebars template

    <script type="text/x-handlebars" data-template-name='app-view'>
  <ul>
  {{#each entry in content}}
    {{#with entry}}
      <li>{{testHelper name}}</li>
    {{/with}}
  {{/each}}
  </ul>
</script>​

    If you don't want to use a global helper then you could use a "pathed query":

    {{#each entry in App.testController}}  
   <div>{{{../testHelper entry.name}}}</div>  
{{/each}}

    ../ is the syntax for a pathed query. It causes you to traverse up the scope tree 1 level, and access private data from a parent scope. To traverse 2 levels upwards you could do the following ../../. This is useful if you have nested for-loops.

    My helpers are written in individual files, so I modified @MikeAski's answer to be the following.

    In helpers/my-helper.js:

    var MyHelper = function(value) {
    return moment(value).format("MMMM Do, YYYY");
};

export
default MyHelper;

    At the top of app.js:

    // import modules
import myHelper from 'appkit/helpers/my-helper';

// register custom helpers
Ember.Handlebars.registerBoundHelper('myHelper', myHelper);

    Then you don't even need the {{#with}} in handlebars, just use as a normal helper.

    {{#each thing}}
    {{myHelper thing.foo}}
{{/each}}

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