Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

Behavior of assignment expression invoked by ng-click within ng-repeat

I'm attempting to update my model using ng-click attached to a <p>.

I have no problem with an assignment expression outside of an ng-repeat, or with calling a scope method inside the ng-repeat. However, if I use an assignment inside the ng-repeat, it appears to be ignored. I don't see any messages reported in the Firefox console, but haven't tried setting breakpoints to see if the event is being fired.

<!DOCTYPE html> <html> <head>     <title>Test of ng-click</title>     <script type='text/javascript' src='http://code.angularjs.org/1.1.1/angular.js'></script>     <script type='text/javascript'>//<![CDATA[           function MyCtrl($scope) {             $scope.selected = "";             $scope.defaultValue = "test";             $scope.values = ["foo", "bar", "baz"];              $scope.doSelect = function(val) {                 $scope.selected = val;             }         }         //]]>        </script> </head>  <body ng-app>     <div ng-controller='MyCtrl'>         <p>Selected = {{selected}}</p>         <hr/>         <p ng-click='selected = defaultValue'>Click me</p>         <hr/>         <p ng-repeat='value in values' ng-click='selected = value'>{{value}}</p>         <hr/>         <p ng-repeat='value in values' ng-click='doSelect(value)'>{{value}}</p>     </div> </body> </html> 

Fiddle is here, if you prefer (along with a couple of earlier variants).

like image 651
kdgregory Avatar asked Mar 13 '13 14:03

kdgregory


1 Answers

Directive ngRepeat creates a new scope for each iteration, so you need to reference your variables in parent scope.

Use $parent.selected = value, as in:

<p ng-repeat='value in values' ng-click='$parent.selected = value'>{{value}}</p> 

Note: Function call propagates due to prototypal inheritance.

If you want to learn more: The Nuances of Scope Prototypal Inheritance.

like image 171
Stewie Avatar answered Nov 10 '22 12:11

Stewie