The use of {foo|json} is effective for displaying only part of the $scope. Is there a way to pass the entire scope to the json filter?
The use of {foo|json} is effective for displaying only part of the $scope. Is there a way to pass the entire scope to the json filter?
It appears that the JSON filter in AngularJS does not allow for outputting the entire $scope object, even when attempting to manipulate it using the controllerAs syntax and connecting the injected $scope to your context.
Example Setup:
<div ng-app="app">
<div ng-controller="TestCtrl as vm">
<div ng-bind="vm.foo | json"></div>
<div ng-bind="vm.scope | json"></div>
</div>
</div>
JavaScript Functionality:
var app = angular.module('app', [])
.controller('TestCtrl', function ($scope) {
var vm = this;
vm.foo = {
bar: "sample bar",
foobar: "example foobar"
};
vm.scope = $scope;
console.log(vm.scope);
});
In the provided JSFiddle link,
{ "bar": "sample bar", "foobar": "example foobar" }
is displayed for vm.foo, whereas
"$SCOPE"
is shown for vm.scope.
Hence, it seems impossible to directly pass the complete scope object to the json filter. Instead, you will need to manually extract and structure the necessary data into a new object. Meanwhile, utilizing angular.copy is also prohibited by Angular in this scenario.
In Angular, there is a built-in toJSON function that prevents you from accessing it in the usual way.
function toJson(obj, pretty) {
if (typeof obj === 'undefined') return undefined;
return JSON.stringify(obj, toJsonReplacer, pretty ? ' ' : null);
}
function toJsonReplacer(key, value) {
....
} else if (isScope(value)) {
val = '$SCOPE';
}
....
}
If you want to access it anyway, you can use a workaround like this, as $scope refers to 'this' in Angular templates.
<div ng-repeat="(k, v) in ($$=this)">
<div ng-if="k!='$$' && k!='this'">key: {{k}}
<pre ng-bind="$$[k]|json:4"></pre>
</div>
</div>
You can see the full snippet and example here
var app = angular.module('app', [])
.controller('TestCtrl', function ($scope) {
$scope.foo = {
bar: "test bar",
foobar: "test foobar"
};
$scope.zzz = {
bar: "test bar",
foobar: "test foobar"
};
});<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div ng-controller="TestCtrl">
<div ng-repeat="(k, v) in ($$=this)">
<div ng-if="k!='$$' && k!='this'">key: {{k}}
<pre ng-bind="$$[k]|json:4"></pre>
</div>
</div>
</div>
</div>Alternatively, if you want to retrieve $scope as a single object in JSON format, you can do it like this or check out the example here
<div ng-init="$scope={}">
<div ng-repeat="(k, v) in ($$=this)" ng-init="$scope[k] = $$[k]" ng-if="k!=='$$'&&k!=='this'&&k!=='$scope'">
</div>
</div>
<pre ng-bind="$scope|json:4"></pre>
This will output:
{
"foo": {
"bar": "test bar",
"foobar": "test foobar"
},
"zzz": {
"bar": "test bar",
"foobar": "test foobar"
}
}
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