我正在使用Angular和Node / Express / Mongo创建一个轮询应用程序,并且当您选择“我想添加自定义选项”时,我想添加一个自定义输入字段来添加选项。我正在使用ng-options来生成投票选项。
民意调查的HTML现在看起来像这样:(从数据库中检索轮询并添加到$ scope.poll.options:
<div class="container">
<div class="panel panel-default">
<div class="panel-body">
<div class="row">
<div class="col-md-6">
<h2>
{{poll.title}}
</h2>
<h5>
Created by: {{poll.displayName}}
</h5>
<form>
<div class="form-group">
<label for="vote">I would like to vote for:</label>
<select class="form-control" id="vote" ng-model="poll.vote" ng-options="item.option as item.option for item in poll.options">
</select>
</div>
<div class="form-group" ng-show="userID === poll.userID">
<br>
<label for="vote">Vote with my own option</label>
<input ng-model="poll.vote" placeholder="Your own option" class="form-control" type="text">
</div>
<button type="submit" class="btn btn-primary" ng-click="votePoll(poll)">Vote</button>
</form>
</br>
</div>
<div class="col-md-6">
<canvas id="myChart" width="400" height="400">
</canvas>
</div>
</div>
</div>
</div>
</div>
投票附加到$ scope.poll.vote,我使用它来命中一个与API对话以更新数据库的EditPoll控制器。
如果您是自己轮询的登录用户+:您可以从下拉列表中选择一个自定义选项,并显示一个空白输入字段以添加选项。我无法弄清楚代码应该是什么,任何建议???
例如:
我想投票支持:
答案 0 :(得分:1)
在这里,您可以使用监视功能将自定义下拉项目与特定文本输入字段绑定,我们可以动态更新下拉归档数据。
var app=angular.module("myApp",[]);
app.controller("FirstController",function($scope){
$scope.items = [{
id: 'opt_1',
label: 'aLabel',
subItem: { name: 'aSubItem' }
},
{
id: 'opt_2',
label: 'bLabel',
subItem: { name: 'bSubItem' }
},
{
id: 'opt_custom',
label: 'I would like a custom option',
subItem: { name: 'bSubItem' }
}];
$scope.checkOptions=function(){
// alert($scope.selected.id);
if($scope.selected.id=='opt_custom'){
$scope.$watch('custom', function(newValue, oldValue) {
debugger;
$scope.items[2].id='opt_custom_'+$scope.custom;
$scope.items[2].label=$scope.custom;
});
}
}
})
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<html ng-app="myApp">
<head>
<title>Simple App</title>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.js"></script>
</head>
<body>
<div ng-controller="FirstController">
<select ng-change="checkOptions()" ng-options="item as item.label for item in items track by item.id" ng-model="selected"></select>
<input ng-model="custom" placeholder="Your own option" class="form-control" type="text">
</div>
</body>
</html>
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