I am new to Angular JS and I am trying to create a set of radio buttons. Creating the buttons was the easy part, but I am having problems figuring out how to default select one of them without breaking everything. I have read about using ngChecked in the Angular docs and on multiple other stackoverflow questions but still can't quite seem to figure it out.
What I need to do is have one of the descriptions preselected when the user es to the page. The price, discount, and deal_value also need to be shown with the values from the preselected price_option object.
Here is the code that I am trying to get to work: /
HTML Code:
<body ng-app="demoApp">
<div ng-controller="DemoController" ng-init="init([{qty: 1, price:10, qty_description:'descrip 1', discount:'1%', deal_value:200}, {qty: 2, price:7, qty_description:'descrip 2', discount:'5%', deal_value:100}])">
<div>
<label ng-repeat="price_option in price_options">
<input type="radio" ng-model="init.price_option" ng-value="price_option" ng-checked="selected_price_option" name="quantity"/>
{{ price_option.qty_description }}
</label>
<ul>
<li>{{ init.price_option.price }}</li>
<li>{{ init.price_option.discount }}</li>
<li>{{ init.price_option.deal_value }}</li>
</ul>
</div>
</div>
</body>
Javascript:
angular.module('demoApp', []).controller('DemoController', function($scope) {
$scope.init = function(prices) {
$scope.price_options = prices;
$scope.selected_price_option = $scope.price_options[0];
};
});
I am new to Angular JS and I am trying to create a set of radio buttons. Creating the buttons was the easy part, but I am having problems figuring out how to default select one of them without breaking everything. I have read about using ngChecked in the Angular docs and on multiple other stackoverflow questions but still can't quite seem to figure it out.
What I need to do is have one of the descriptions preselected when the user es to the page. The price, discount, and deal_value also need to be shown with the values from the preselected price_option object.
Here is the code that I am trying to get to work: http://jsfiddle/qWzTb/311/
HTML Code:
<body ng-app="demoApp">
<div ng-controller="DemoController" ng-init="init([{qty: 1, price:10, qty_description:'descrip 1', discount:'1%', deal_value:200}, {qty: 2, price:7, qty_description:'descrip 2', discount:'5%', deal_value:100}])">
<div>
<label ng-repeat="price_option in price_options">
<input type="radio" ng-model="init.price_option" ng-value="price_option" ng-checked="selected_price_option" name="quantity"/>
{{ price_option.qty_description }}
</label>
<ul>
<li>{{ init.price_option.price }}</li>
<li>{{ init.price_option.discount }}</li>
<li>{{ init.price_option.deal_value }}</li>
</ul>
</div>
</div>
</body>
Javascript:
angular.module('demoApp', []).controller('DemoController', function($scope) {
$scope.init = function(prices) {
$scope.price_options = prices;
$scope.selected_price_option = $scope.price_options[0];
};
});
3 Answers
Reset to default 8HTML
<body ng-app="demoApp">
<!-- ng-init functionality belongs in controller -->
<div ng-controller="DemoController">
<!-- move ng-repeat to container div instead of label -->
<div ng-repeat="price_option in price_options">
<label>
<!-- the model is the scope variable holding the selected value -->
<!-- the value is the value of this particular option -->
<input type="radio" ng-model="$parent.selected_price_option" ng-value="price_option" name="quantity" />{{price_option.qty_description}}</label>
<ul>
<li ng-bind="price_option.price"></li>
<li ng-bind="price_option.discount"></li>
<li ng-bind="price_option.deal_value"></li>
</ul>
</div>
</div>
</body>
JS
angular.module('demoApp', []).
controller('DemoController', function ($scope) {
//moved init logic to controler
$scope.price_options = [{
qty: 1,
price: 10,
qty_description: 'descrip 1',
discount: '1%',
deal_value: 200
}, {
qty: 2,
price: 7,
qty_description: 'descrip 2',
discount: '5%',
deal_value: 100
}];
$scope.selected_price_option = $scope.price_options[1];
});
Forked fiddle: http://jsfiddle/W8KH7/2/
Or you can use the object strategy to avoid having to reference $parent: http://jsfiddle/W8KH7/3/
General suggestion, avoid using '{{}}' use ng-bind (This will not related to question, its just good practice )
Use
ng-value="true"
If you want to control from controller.js then use
ng-checked="default_option"
and control it in controller.js
$scope.default_option = true
Try this approach:
angular.module('demoApp', []).controller('DemoController', function ($scope) {
$scope.priceOptions = [
{qty: 1, price: 10, qty_description: 'Descrip 1', discount: '1%', deal_value: 200},
{qty: 2, price: 7, qty_description: 'Descrip 2', discount: '5%', deal_value: 100}
];
$scope.selected = {priceOption: $scope.priceOptions[0]};
});
HTML
<label ng-repeat="priceOption in priceOptions">
<input type="radio" ng-model="selected.priceOption" ng-value="priceOption" name="quantity" />
{{ priceOption.qty_description }}
</label>
<ul>
<li>{{ selected.priceOption.price }}</li>
<li>{{ selected.priceOption.discount }}</li>
<li>{{ selected.priceOption.deal_value }}</li>
</ul>