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Radio Buttons ng-checked with ng-model

In my HTML page, I have two sets of Boolean based radio buttons: Labeled: "Yes" and "No" / Values: True and False respectively. I'm populating a full form from a PostgreSQL database table to allow the authenticated user to view the form with populated data and edit the populated fields including the radio buttons, then save the form which will save the data to the DB. All of the other text fields populate without issue; it's both collection of radio buttons I am having an issue with pre-checkmarking the radio buttons.

The below does not pre-populate the checked on front end (but adds the correct attribute of checked in HTML source):

    <input id="billing-no" type="radio" name="billing" ng-model="person.billing" value="FALSE" ng-checked="person.billing == 'false'" />
    <input id="billing-yes" type="radio" name="billing" ng-model="person.billing" value="TRUE" ng-checked="person.billing == 'true'" />

However, this does check the correct radio button on load:

    <input id="billing-no" type="radio" name="billing" value="FALSE" ng-checked="person.billing == 'false'" />
    <input id="billing-yes" type="radio" name="billing" value="TRUE" ng-checked="person.billing == 'true'" />

Note: I needed to check against the string boolean value in the directive ng-checked since the boolean value always comes back as a string from PostgreSQL. This, apparently, was a part of PostgreSQL's design when querying data from columns that have boolean data types.

When adding the ng-model directive, the radio button no longer is checked (at least in the rendered browser view). The odd part is that I looked at the source and it clearly checks the correct one. What's even more odd, is that I have to click on the radio button twice to 'check' it. I've tested this in latest version of Chrome, FF, and IE and it all results in the same issue.

The question is: when adding the ng-model directive, why would the HTML source add 'checked' in the radio button attribute, but seemingly does not mark the radio button? Furthermore, why would I have to click twice on the radio button that IS supposed to be checked?


Solution: To fix this, I removed the ng-checked directive from the radio buttons and only used ng-model as suggested by @Cypher and @aet. I then replaced the attribute value with the directive ng-value "true" & "false". After, I set the values in the controller.

HTML

<input id="billing-no" type="radio" name="billing" ng-model="person.billing" ng-value="false" />
<input id="billing-yes" type="radio" name="billing" ng-model="person.billing" ng-value="true" />

Angular JS

app.controller('peopleCtrl', function($scope, peopleFactory){
    ...
    peopleFactory.getPerson(personParams).then(function(data){
        $scope.person = data;
        /* moved from ng-checked */
        $scope.person.billing = data.billing == 'true';
    });
    ...
};
like image 756
RNickMcCandless Avatar asked Apr 24 '14 20:04

RNickMcCandless


People also ask

Does checked work for radio buttons?

The checked property sets or returns the checked state of a radio button. This property reflects the HTML checked attribute.

How do you check the radio button is checked?

Using Input Radio checked property: The Input Radio checked property is used to return the checked status of an Input Radio Button. Use document. getElementById('id'). checked method to check whether the element with selected id is check or not.

What does ng checked do?

Definition and Usage. The ng-checked directive sets the checked attribute of a checkbox or a radiobutton. The checkbox, or radiobutton, will be checked if the expression inside the ng-checked attribute returns true. The ng-checked directive is necessary to be able to shift the value between true and false .

What is the value of a checked radio button?

The checked property returns True if the radio button is selected and False otherwise.


1 Answers

I think you should only use ng-model and should work well for you, here is the link to the official documentation of angular https://docs.angularjs.org/api/ng/input/input%5Bradio%5D

The code from the example should not be difficult to adapt to your specific situation:

<script>
   function Ctrl($scope) {
      $scope.color = 'blue';
      $scope.specialValue = {
         "id": "12345",
         "value": "green"
      };
   }
</script>
<form name="myForm" ng-controller="Ctrl">
   <input type="radio" ng-model="color" value="red">  Red <br/>
   <input type="radio" ng-model="color" ng-value="specialValue"> Green <br/>
   <input type="radio" ng-model="color" value="blue"> Blue <br/>
   <tt>color = {{color | json}}</tt><br/>
</form>
like image 78
TlonXP Avatar answered Sep 20 '22 16:09

TlonXP