controlling isOpen in angular ui bootstrap - angularjs

Question

I would like use isOpen attributes in angualr ui bootstrap accordion directive so it would open the first element of the first ng-repeat in the accordion. I have tried few things with no luck. can anyone advise on this?
//html
<div ng-show="accordionCtrl.isNotString(value);" class="accordionContainer" ng-repeat="(key, value) in accordionCtrl.lessons">
<div class="accordionStepBox">
<h4 class="accordionStepTitle">Step {{$index+1}}: {{value.title}}</h4>
<span>Summary: {{value.summary}}</span>
</div>
<div class="accordionCoursesBox">
<div class="accordionCoursesText">Courses</div>
<!-- accordion for suffles -->
<uib-accordion close-others="accordionCtrl.oneAtATime">
<!-- only give accordion to object vals -->
<div class="accordion" ng-show="accordionCtrl.isNotString(value);" ng-repeat="(key, value) in value">
<!-- <uib-accordion-group heading="{{value.title}}" is-open="accordionCtrl.firstIndex($index)"> -->
<uib-accordion-group heading="{{value.title}}">
<div ng-repeat="(key, value) in value">
<div ng-show="accordionCtrl.isNotString(value);" class="accordionSuffleBox">
{{$index+1}}. {{value.title}}
</div>
</div>
<br/>
<button ui-sref="lesson" class="btn btn-default accordionbutton">Start</button>
</uib-accordion-group>
</div>
</uib-accordion>
</div>
</div>
//controller
angular
.module('neuralquestApp')
.controller('AccordionCtrl', AccordionCtrl);
function AccordionCtrl(FirebaseUrl, $firebaseObject, $firebaseArray) {
var accordionCtrl = this;
var getLessons = getLessons;
accordionCtrl.oneAtATime = true;
accordionCtrl.init = init;
accordionCtrl.init();
accordionCtrl.isNotString = isNotString;
accordionCtrl.firstIndex = firstIndex;
/*======================================
= IMPLEMENTATION =
======================================*/
function init() {
getLessons();
}
function firstIndex(index) {
if(index === 0){
return true;
} else {
return false;
}
}
function getLessons() {
var ref = new Firebase(FirebaseUrl);
accordionCtrl.lessons = $firebaseObject(ref.child('NeuralNetwork'));
}
function isNotString(val) {
// console.log('val', val);
if(typeof val === "string"){
console.log('is string', val);
return false;
} else {
return true;
}
}
}

Answer 1

The is-open attribute is setup for 2 way binding with the controller, so you could do something like so:
<div ng-controller="AccordionDemoCtrl">
<uib-accordion>
<div ng-repeat="group in groups">
<uib-accordion-group heading="{{group.title}}" is-open="openIndex[$index]">
{{group.content}}
</uib-accordion-group>
</div>
</uib-accordion>
</div>
angular.module('ui.bootstrap.demo').controller('AccordionDemoCtrl', function ($scope) {
$scope.openIndex = [true];
$scope.groups = [
{
title: 'Group Header - 1',
content: 'Group Body - 1'
},
{
title: 'Group Header - 2',
content: 'Group Body - 2'
},
{
title: 'Group Header - 3',
content: 'Group Body - 3'
},
{
title: 'Group Header - 4',
content: 'Group Body - 4'
}
];
});
Example plunk. Also, the close-others attribute default value is true, so you don't need to explicitly set that to true.