AngularJS changing deep scope object value -


hit bit of brick wall here hoping guidance.

i'm building scope variable called 'display' built off 2 http calls haven't included keep simple. i'm doing adding product types each category object.

$scope.display = {};  portal.fetchcategories().then(function(data) {     $scope.categories = data.categories;     return portal.fetchproducttypes(); }) .then(function(data) {     $scope.producttypes = data.product_types;      angular.foreach($scope.categories, function(value) {         $scope.display[value.id] = {             title: value.title,             start: value.start,             end: value.end,             product_types: $scope.producttypes         };     }); })

this works fine.

the trouble i'm having when target product type inside category , attempt update title:

$scope.display[2].product_types[0]['title'] = "updated title";

it updating product type title in categories rather specified category. suspect it's updating $scope.producttypes.

can shed light on i'm doing wrong?

problem same object reference associated product types display. can overcome making copy of producttypes, if suffices , not problem.

angular.foreach($scope.categories, function(value) {     $scope.display[value.id] = {         title: value.title,         start: value.start,         end: value.end,         product_types: angular.copy($scope.producttypes)     }; });

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