Loop over items and use the item in ng-init

I would like to use a ng-repeat to loop over dimmer items.

<div ng-repeat="thisitem in itemsInGroup(testgroup) | filter: query as filtered">
  <div class="test" ng-init="model_1={ item: thisitem, hidelabel: true, hidepointer: true, hidelimits: true }">
    <widget-slider ng-model="model_1" style="width: 80%; margin-left: -10px; display: block;"></widget-slider>

This code is not working, and I guess the problem lies in ng-init where I would like to use thisitem.
Any idea how this can be solved?