这是我的 html :
<body ng-controller="myCtrl">
{{loadDataSubject('${subjectList}')}}
{{loadDataTopic('${topicList}')}}
<h1 class = "bg-success" style="color: red;text-align: center">Fill in the below details for Question Template : -</h1> <br>
<div class="container">
<form method="get" action="createTemplate">
<div class="form-group">
<label for="sel1">Topics (select one):</label>
<select class="form-control" ng-model="selectedTopic" ng-options="topic.name as topic.name for topic in topics">
</select> <br>
{{selectedTopic}}
<label for="sel1">Subject (select one):</label>
<select name="subject" value= "" class="form-control" ng-model ="selectedSubject" ng-options="sub.name as sub.name for sub in subjects">
</select> <br>
<label for="sel1">Negative marking:</label>
<select class="form-control" name="negativeMarks">
<option>Yes</option>
<option>No</option>
</select> <br>
<label>Reference Book:</label>
<input type="text" class="form-control" name="ref" required>
<label for="sel1">Number of Questions:</label>
<input type="number" class="form-control" name="questionCount" required><br>
<input class ="bg-primary" type="submit" value="submit and download template">
</div>
</form>
</div>
</body>
这是脚本:
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope, $http) {
$scope.subjects = [];
$scope.topics = [];
$scope.selectedSubject = {};
$scope.selectedTopic = {};
$scope.loadDataSubject = function(subjectList) {
$scope.subjects = JSON.parse(subjectList);
};
$scope.loadDataTopic = function(topicList) {
$scope.topics = JSON.parse(topicList);
};
});
我想在选项中添加一个过滤器以仅选择所选主题的主题， 类似过滤器的东西:selectedTopic.id
错误是
angular.js:38 Uncaught Error: [$rootScope:infdig] http://errors.angularjs.org/1.4.8/$rootScope/infdig?p0=10&p1=%5B%5B%7B%22ms…turn%20b(f%2Cc%2Ce)%7D%22%2C%22newVal%22%3A74%2C%22oldVal%22%3A68%7D%5D%5D
at angular.js:38
at r.$digest (angular.js:15934)
at r.$apply (angular.js:16160)
at angular.js:1679
at Object.e [as invoke] (angular.js:4523)
at c (angular.js:1677)
at yc (angular.js:1697)
at Zd (angular.js:1591)
at angular.js:29013
at HTMLDocument.b (angular.js:3057)
在此之前，我想将对象的值绑定(bind)到 ng-model，同时绑定(bind)对象名称。请帮助我，我是新手。
科目: [{"subjectId":1,"name":"ComputerScience","code":"CS"},{"subjectId":2,"name":"计算机基础","code":"CS","documentUrl":"None"},{"subjectId":3,"name":"计算机基础","code":"CS","documentUrl":"None"},{"subjectId":4,"name ":"php","code":"PHP01","documentUrl":"None"},{"subjectId":5,"name":"JAVA","code":"JAVA01","childSubjects": [{"subjectId":6,"name":"Core Java","code":"JAVA02","parentSubject":5,"childSubjects":[{"subjectId":8,"name":"线程","code":"JAVA04","parentSubject":6},{"subjectId":9,"name":"对象类","code":"JAVA05","parentSubject":6},{"subjectId ":10,"name":"Inheritance","code":"JAVA06","parentSubject":6}]},{"subjectId":7,"name":"Advance Java","code":"JAVA03","parentSubject":5,"childSubjects":[{"subjectId":11,"name":"Servlet","code":"JAVA07","parentSubject":7}]}]},{"subjectId":12,"name":"计算机基础","code":"CS","documentUrl":"None"}]
主题:
[{"topicId":1,"name":"Technical","code":"TECH","isSubjectsRelated":1,"description":"All Technical subjects","isActive":1,"subjects":[{"subjectId":1,"name":"ComputerScience","code":"CS"},{"subjectId":1,"name":"ComputerScience","code":"CS"}]},{"topicId":2,"name":"GATE","code":"GATE","isSubjectsRelated":1,"description":"GATE exam","isActive":1,"subjects ":[]},{"topicId":5,"name":"Programming","code":"PROG","isSubjectsRelated":0,"description":"编码技巧","isActive":1, “主题”:[{“主题 ID”:5，“名称”:“JAVA”，“代码”:“JAVA01”}]}]
最佳答案
将您的主题选择框更改为此
<label for="sel1">Topics (select one):</label>
<select class="form-control" ng-model="selectedTopic" ng-options="topic as topic.name for topic in topics">
</select>
主题选择框也类似。查看this笨蛋。
关于javascript - 如何在对象数组的 select 标记中的 ng-model 中设置对象值。是否有一种简单的方法可以在 ng-options 上添加过滤器，，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43714894/