Ember.js: TextField with dynamic binding

Question

I want to bind a TextField to a property which is specified by a string variable (see the edit for a better explanation), as in this question. Unfortunately the answer that was

Answer 1

After many failed attempts I found a pretty simple solution.

Add the helper

Ember.Handlebars.helper('dataTextField', function (data, key, options) {
    options.hash.valueBinding = 'data.' + key;

    return Ember.Handlebars.helpers.input.apply(this, [options]);
});

and then call

{{dataTextField data key}}

This will render a text field that shows and changes the value of data[key] and it even supports all the optional arguments the normal input helper can understand.