Reference the inputs created with ng-repeat in angular based on the number of variable options

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My question was:

The problem I’m facing, as outlined in the code, is that I can’t seem to find out how to bind the second checkboxes (created with ng-repeat) to some model which I would then be able to use further down the code (showing/hiding yet another set of options). Also, I managed to show the additional number of inputs based on the count parameter in the $scope.availableOptions by using the $scope.getItterator function, but now I don’t see how would I access the values of these checkboxes? I know I have to somehow use the option “ng-model” but am failing to do so, so any help appreciated.

My code is here, but am showing it here too:

HTML:

<div ng-controller='MyCtrl'>
    Show additional options <input type="checkbox" ng-model="additionalOptions">
    <div ng-show="additionalOptions">
        <ul>
            <li ng-repeat="option in availableOptions">
                <label class="checkbox" for="opt_{{option.id}}">
                    <input type="checkbox" name="opt_{{option.id}}" id="opt_{{option.}}" />
                    {{option.name}}

                    <ul ng-show="if the upper checkbox is clicked">
                        <li>
                            <input type="text" ng-repeat="i in getItterator(option.count)" ng-model="SOME_VALUE_TO_BE_USED_BELOW"/>
                            Output the value based on what's entered above in the textboxes (SOME_VALUE_TO_BE_USED_BELOW)
                        </li>   
                    </ul>
                </label>
            </li>
        </ul>
    </div>
</div>

and my js:

function MyCtrl($scope) {
    $scope.availableOptions = [{"id":"1","name":"easy","count":"2"},{"id":"2","name":"medium","count":"3"},{"id":"3","name":"hard","count":"2"}];

    $scope.getItterator=function(n){
        var a = new Array();

        for(var i=1; i <= n; i++)
            a.push(i);

        return a;       
    };
}

The answer, by user Khanh TO, was:

Try ng-model="option.checked":

<input type="checkbox" name="opt_{{option.id}}" id="opt_{{option.}}" ng-model="option.checked"/>

And then you can access this property further below like this:

<ul ng-show="option.checked">

DEMO

If you need to also reference the text box inputs. You create a new property (values) on the option. Like this:

{"id":"1","name":"easy","count":"2",values:[]}

Html:

<div ng-repeat="i in getItterator(option.count)">
     <input type="text"  ng-model="option.values[$index]"/>
      {{option.values[$index]}}
</div>

DEMO