each ... in ... support for ember compat handlebars

app/assets/javascripts/discourse/lib/ember_compat_handlebars.js

@@ -38,7 +38,18 @@
     };
   };
 
-  stringCompatHelper("each");
+  // #each .. in support
+  RawHandlebars.registerHelper('each', function(localName,inKeyword,contextName,options){
+    var list = Em.get(this, contextName);
+    var output = [];
+    var innerContext = Object.create(this);
+    for (var i=0; i<list.length; i++) {
+      innerContext[localName] = list[i];
+      output.push(options.fn(innerContext));
+    }
+    return output.join('');
+  });
+
   stringCompatHelper("if");
   stringCompatHelper("unless");
   stringCompatHelper("with");

app/assets/javascripts/discourse/templates/list/posters-column.raw.hbs

@@ -1,5 +1,5 @@
 <td class='posters'>
-{{#each posters}}
-<a href="{{user.path}}" data-user-card="{{user.username}}" class="{{extras}}">{{avatar this usernamePath="user.username" imageSize="small"}}</a>
+{{#each poster in posters}}
+<a href="{{poster.user.path}}" data-user-card="{{poster.user.username}}" class="{{poster.extras}}">{{avatar poster usernamePath="user.username" imageSize="small"}}</a>
 {{/each}}
 </td>

app/assets/javascripts/discourse/templates/topic-status.raw.hbs

@@ -1,8 +1,8 @@
 {{~#if view.renderDiv ~}}
 <div class='topic-statuses'>
 {{/if ~}}
-{{~#each view.statuses ~}}
-<{{openTag}} title='{{title}}' class='topic-status'><i class='fa fa-{{icon}}'></i></{{closeTag}}>
+{{~#each status in view.statuses ~}}
+<{{status.openTag}} title='{{status.title}}' class='topic-status'><i class='fa fa-{{status.icon}}'></i></{{status.closeTag}}>
 {{~/each}}
 {{~#if view.renderDiv ~}}
 </div>