我正在循环嵌套的JSON对象,并且我无法访问子项。
以下是我正在使用的JSON文件的示例。它传递了JSONLint测试,因此可以认为它没问题。
JSON
[{
"fleetcheckitemid": "1",
"checkitemdesc": "Engine oil level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}, {
"fleetcheckitemid": "2",
"checkitemdesc": "Water level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}, {
"fleetcheckitemid": "3",
"checkitemdesc": "Brake fluid level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}]
我可以访问“ fleetcheckitemid ”和“ checkitemdesc ”,但我无法访问“答案”:[{“fleetcheckitemid “:”2“,”checkitemdesc“:”Ok“},......值
在我的控制器中,我有以下代码,但是当我点击内部.each()循环时,我收到一个错误:“ TypeError:无法读取未定义的属性'length'”< / p>
app.js
$http.get("http://mymadeupdomain/api/getfleetchecks.php?fleetid=" + $scope.newFleetIDValue).success(function(data)
{
$scope.data = data;
console.log("$scope.data: " + $scope.data); // WORKING - [object Object], ... [object Object]
$scope.answersArray = [];
console.log("$scope.answers: " + $scope.answers); // EMPTY ARRAY - NOT INITIALISED YET
// Unable to access sub-items (answers) here
$.each($scope.data, function(index, element)
{
var itemDescription = element.checkitemdesc;
console.log("itemDescription: " + itemDescription); // WORKING - Engine Oil Level
var fleetcheckitemid = element.fleetcheckitemid;
console.log("fleetcheckitemid: " + fleetcheckitemid); // WORKING - 1....34
$.each(this.answers, function(index, element)
{
var answers = element.answers;
var fleetcheckid = element.fleetcheckid;
console.log("element.fleetcheckid: " + element.fleetcheckid); // NOT WORKING
console.log("fleetcheckid: " + fleetcheckid); // NOT WORKING
});
});
});
我哪里出错了?它可以是JSON中答案的[]括号导致这个吗?
答案 0 :(得分:2)
您问题的其他解决方案。
var app = angular.module("testApp", []);
app.controller('testCtrl', function($scope){
$scope.data = [{
"fleetcheckitemid": "1",
"checkitemdesc": "Engine oil level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}, {
"fleetcheckitemid": "2",
"checkitemdesc": "Water level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}, {
"fleetcheckitemid": "3",
"checkitemdesc": "Brake fluid level",
"answers": [{
"fleetcheckid": "1",
"checkvaluedesc": "Ok"
}, {
"fleetcheckid": "2",
"checkvaluedesc": "Low"
}, {
"fleetcheckid": "3",
"checkvaluedesc": "Top-Up Required"
}]
}];
angular.forEach($scope.data,function(value,key){
console.log(value.fleetcheckitemid);
console.log(value.checkitemdesc);
angular.forEach(value.answers,function(v,k){
console.log(v.fleetcheckid);
console.log(v.checkvaluedesc);
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="testApp" ng-controller="testCtrl">
</div>
答案 1 :(得分:1)
对$scope.answers
而不是this.answers
进行循环。然后更改$.each
第二个参数名称,该名称与外部element
变量相同。所以当控制进入函数内部时
$.each($scope.answers, function(index, ele) {//also change variable here
var answers = element.answers;
var fleetcheckid = element.fleetcheckid;
console.log("element.fleetcheckid: " + element.fleetcheckid);
console.log("fleetcheckid: " + fleetcheckid); // NOT WORKING
}
仍然不确定,您如何填写$scope.answers
中的值?
答案 2 :(得分:0)
angular.forEach($scope.data, function(data1){
console.log("fleetcheckitemid: " + data1.fleetcheckitemid); // WORKING - 1....34
angular.forEach(data1.answers, function(data2)
{
console.log("element.fleetcheckid: " + data2.fleetcheckid); // NOT WORKING
console.log("DESC: " + data2.checkvaluedesc); // NOT WORKING
});
});