Foreach inside foreach not working in knockout

Question

I am trying to apply foreach inside foreach in knockout but it's not working outer foreach is working fine for me but for inner foreach is it saying MyFMnu1 is undefined.

If i put this inner foreach outside then it is working but why it is not working inside the foreach.

<div data-bind="foreach: MyFmnu">
      <!-- ko if: key === 'ASM' -->
           <input type="checkbox" value="ASM"  class="styled"  
               name="fldMenuCheck_Acc1" id="fldMenuCheck_Acc1"
               style="width:10%;"/>
      <!-- /ko -->
      <div data-bind="foreach: MyFmnu1">
           <!-- ko if: key === 'ASMS' -->
                <input type="checkbox" value="ASMS"  class="styled"  
                     name="fldMenuCheck_Acc12" id="fldMenuCheck_Acc12"
                     style="width:10%;"/>
           <!-- /ko -->
       </div>
</div>

My view model

var AccountsViewModel = function () {

    var self = this;

    self.myfavmenu = ko.observable();
    self.PerLzdmenuList = ko.observable();
    self.MyPerlzdMenus = ko.observable();

    self.myfavmenuOtherCount = ko.observable();
    self.MyFmnu = ko.observableArray([]);
};

Answer 1

Inside foreach binding the binding context is item of collection, not the root view model. To get access to parent context in foreach binding use $parent, like this:

<div data-bind="foreach: MyFmnu">
      <!-- ko if: key === 'ASM' -->
           <input type="checkbox" value="ASM"  class="styled"  
               name="fldMenuCheck_Acc1" id="fldMenuCheck_Acc1"
               style="width:10%;"/>
      <!-- /ko -->
      <div data-bind="foreach: $parent.MyFmnu1">
           <!-- ko if: key === 'ASMS' -->
                <input type="checkbox" value="ASMS"  class="styled"  
                     name="fldMenuCheck_Acc12" id="fldMenuCheck_Acc12"
                     style="width:10%;"/>
           <!-- /ko -->
       </div>
</div>

more info here: http://knockoutjs.com/documentation/binding-context.html

Answer 2

If you have a MyFmnu1 array as a property for each object in the MyFmnu array, it will work.