如何为AngularJS表单验证至少要求1个复选框? [英] How to require at least 1 checkbox for AngularJS Form Validation?
问题描述
我有一个显示在窗体中的JSON对象数组。我希望进行表单验证工作,用户必须至少选择一个复选框才能使整个表单有效。
I have an array of JSON objects which is displayed in a form. I would like to have the form validation work where a user has to select at least one checkbox for the entire form to be valid.
我知道 ng-required
可以使用,但是对于我的实现,这意味着必须选择所有这些才能生效。
I know that the ng-required
can be used but with the implementation I have, it means that all of them have to be selected for it to be valid.
以下是我到目前为止的代码:
Here is the code I have so far:
index.html:
<div ng-repeat="item in volunteerOptions">
<label class="checkbox"><input type="checkbox" value="" data-ng-model="item.selected" ng-required="true">{{ item.content }}</label>
</div>
<button type="submit" class="btn btn-success" ng-disabled="!memberRegistrationForm.$valid">Submit</button>
controller.js
$scope.volunteerOptions = [
{ content : 'Content 1', selected : false },
{ content : 'Content 2', selected : false },
{ content : 'Content 3', selected : false },
{ content : 'Content 4', selected : false },
];
关于我如何能够实现这种行为的任何想法?
Any ideas on how I would be able to achieve this behaviour?
推荐答案
您可以添加另一个范围属性并使用 array.some
来检查是否有任何选中
是 true
。然后将该范围属性提供给 ng-required
。类似于
You can add another scope property and use array.some
to check if any of the selected
are true
. Then feed that scope property to ng-required
. Something like
$scope.isOptionsRequired = function(){
return !$scope.volunteerOptions.some(function(options){
return options.selected;
});
}
<input type="checkbox" value="" data-ng-model="item.selected" ng-required="isOptionsRequired()">
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