我在scope变量这样的存储数据比较两个数组和获取数据，因为它是
$scope.myData =
{
"firstName": "rocky",
"lastName": "P",
"place": "Koraput",
"education": [
{
"id": "764006"
},
{
"id": "764001"
}
],
"email": "[email protected]",
"id": "46ads75asda7s6d57ad"
}
案例：假设我更新这个数据。我添加了教育，然后点击cancel。如何删除当前添加的教育点击取消和检索数据，只有两个教育如上所述点击edit user？
您可以使用angular.copy()方法有原始数组的一个副本对象，只是让对它的引用，当你取消：
var app = angular.module('demoApp', []);
app.controller('demoCtrl', function($scope) {
$scope.myData = {
"firstName": "rocky",
"lastName": "P",
"place": "Koraput",
"education": [{
"id": "764006"
}, {
"id": "764001"
}],
"email": "[email protected]",
"id": "46ads75asda7s6d57ad"
};
$scope.copy = angular.copy($scope.myData.education);
$scope.onAdd = function() {
$scope.myData.education.push({
id: $scope.myData.education.length
});
};
$scope.onCancel = function() {
$scope.myData.education = $scope.copy; // <----reset to original
};
});<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0/angular.min.js"></script>
<div ng-app="demoApp" ng-controller="demoCtrl">
<pre>{{myData.education}}</pre>
<button ng-click="onAdd()">+</button>
<button ng-click="onCancel()">X</button>
</div>你应该保持两个独立对象，一个是原始的，未改变的对象，另一个用于编辑。一旦用户点击，说save，那么你应该用第二个对象覆盖第一个对象。单击cancel后，只需将可编辑对象的值恢复为原始数据的克隆即可。
// Your original data (unchanged)
$scope.myData = { /* ... */ };
// Your object for editing purposes
$scope.myDataClone = clone($scope.myData);
$scope.cancel = function() {
// reset the 'editable' clone to the unchanged value of myData
$scope.myDataClone = clone($scope.myData);
}
$scope.save = function() {
// Once the user accepts their changes, you can simply
// set the value of myData to a clone of the edited data.
// This will ensure you are not just creating a new pointer
// from myData to myDataClone, which would cause myData
// to change if you make subsequent requests to myDataClone.
$scope.myData = clone($scope.myDataClone);
}
// A clone function which takes an object and returns an exact
// replica as a new object with a unique memory reference
function clone(obj) {
return JSON.parse(JSON.stringify(obj));
}
保留原始副本，并在取消作品时对其进行比较。 –
这是你要找的答案吗？ –
是的。而不是克隆（），我用angular.copy（）@Danny Bull –
删除使用ID
$scope.myData =
{
"firstName": "rocky",
"lastName": "P",
"place": "Koraput",
"education": [
{
"id": "764006"
},
{
"id": "764001"
}
],
"email": "[email protected]",
"id": "46ads75asda7s6d57ad"
};
//Remove specific item
$scope.onCancel = function(cancelId){
for(var i in $scope.myData.education){
if($scope.myData.education[i].id==cancelId){
$scope.myData.education.splice(i, 1);;
break;
}
}
};
可以使主对象，而副本取消：
你会通过克隆的第一个对象到一个新的，第二个对象开始您可以使用副本更新主对象
并保存更新副本时使用新对象
像
$scope.myData =
{
"firstName": "rocky",
"lastName": "P",
"place": "Koraput",
"education": [
{
"id": "764006"
},
{
"id": "764001"
}
],
"email": "[email protected]",
"id": "46ads75asda7s6d57ad"
};
$scope.copymyData = angular.copy($scope.myData);
$scope.cancel = function(){
$scope.myData = angular.copy($scope.copymyData);
}
$scope.save = function(){
$scope.copymyData = angular.copy($scope.myData);
}
我们可以通过使用push和pop实现这一目标，
HTML：
<button ng-click="cancel()">cancel</button>
控制器：
$scope.myData =[];
$scope.myData = [
{
"firstName": "rocky",
"lastName": "P",
"education":'MBA',
"place": "Koraput",
"email": "[email protected]",
"id": "46ads75asda7s6d57ad"
}];
$scope.myData.push({
education : 'BE'
})
$scope.cancel = function(){
var lastElement = $scope.myData.pop();
}
请编辑的问题。目前还不清楚你想问什么。 – ScrapCode
你可以有一个你的初始数组的副本，当编辑和恢复到取消可能吗？ – tanmay
使用'.push（）'将数据添加到您的教育中，这会将数据添加到数组的末尾。如果取消，则使用'.pop（）'。这将删除您最后添加的数据。 – Jalil