{{bindAttr }} {{action}} [Object] Has no method replace - ember.js

Question

when ember.js tries to render my template containing the following bindAttr. the following exception is thrown in handlebars.js
Uncaught TypeError: Object [object Object] has no method 'replace' handlebars.js:848
bind attr tag:
<div class="postWrapper" {{bindAttr style="display:none"}}>
Update
this also happens when i use the action helper
<div {{action Toggle}} class="btn pull-right">
<i class="postToggler icon-chevron-down " ></i>
</div>
Update Full Code
Template
<script type="text/x-handlebars" data-template-name="Composer">
<div class="postWrapper">
<div class="postContentWrapper" {{bindAttr style="controller.display"}}>
<div class="row-fluid">
<div class="pull-left span10">
To :
<input id="test2" type="text" style="margin-top: 7px;width:90%" />
</div>
<div {{action Toggle}} class="btn pull-right">
<i class="postToggler icon-chevron-down " ></i>
</div>
</div>
<div class="row-fluid" style="height:100%" >
<div id="wmd-button-bar" style="width:48%;display:inline-block" ></div>
<div class="pull-right">
<a>Hide preview</a>
</div>
<div class="wmdWrapper" style="height:80%">
<div class="wmd-panel" style="vertical-align: top;">
<textarea class="wmd-input" id="wmd-input" style="height: 100%;"></textarea>
</div>
<div id="wmd-preview" class="wmd-preview pull-right"></div>
</div>
<br />
</div>
<div class="row-fluid">
<div class="span6 ">
<p>
Tags :
<input id="test" type="text" style="width:80%"/>
</p>
</div>
<div class="span2 pull-right">
<button id="btnSubmitPost" class="btn btn-success pull-right">{{controller.buttonText}}</button>
<button id="btnCanelPost" class="btn btn-warning pull-right">Cancel</button>
</div>
</div>
<div class="row-fluid">
</div>
</div>
</div>
</script>
View and render
/*
MODES
NEW
REPLY
*/
Thoughts.ComposerController = Ember.Object.extend({
mode: 2,
visible: false,
messageContent: "",
buttonText: function () {
switch (this.get("mode")) {
case 1: return "Post";
case 2: return "Reply";
}
}.property(),
display: function () {
if (this.get("visible")) {
return 'display:block';
} else
return 'display:none';
}.property(),
Toggle: function(){
console.log('Helllo');
}
});
Thoughts.ComposerController = Thoughts.ComposerController.create();
Error Information
object dump
string: "data-ember-action="1""
__proto__: Object
constructor: function (string) {
toString: function () {
__proto__: Object
Crashes on the replace method, because the method replace is undefined
Handlebars.Utils = {
escapeExpression: function (string) {
// don't escape SafeStrings, since they're already safe
if (string instanceof Handlebars.SafeString) {
return string.toString();
} else if (string == null || string === false) {
return "";
}
if (!possible.test(string)) { return string; }
----> return string.replace(badChars, escapeChar);
},

Answer 1

So first of all you need to define only need to define the controller. You don't have to create an instance. Ember will do it for you when application initialize.
If you define a property that is observing another in other words its value depends on another, you need this to specify as parameter to property helper.
Thoughts.ComposerController = Ember.Controller.extend({
mode: 2,
visible: false,
messageContent: "",
buttonText: function () {
switch (this.get("mode")) {
case 1: return "Post";
case 2: return "Reply";
}
}.property('mode'),
display: function () {
return 'display:' + this.get('visible') ? 'block' : 'none';
}.property('visible'),
Toggle: function () {
this.toggleProperty('visible');
this.set('mode', this.get('mode') == 2 ? 1 : 2);
}
});
Template itself seems valid.
You can get this working by creating a composer route like this:
this.route('composer');
or by rendering it in another template like this:
{{render 'composer'}}
That should be answer to your question. BUT
Wouldn't be better to use {{if}} helper for showing some content inside of template based on a condition?

Answer 2

i finally found some time to work on this again.
all i did was replace the ember and handlebars js files, and the code is working fine now thanks