我将设施复选框选项显示为json数组的ng-repeat，并且以逗号分隔的ID（例如“ 1、3、7”）的形式存储在数据库中，但是我需要编辑设施复选框时无法将现有选项显示为检查因为我从db获得的现有值为1,3,7作为单个字符串，我将如何使用ng-repeat中的选项检查此字符串？
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.amenities=[{id:1,value:"Wifi"},
{id:2,value:"AC"},
{id:3,value:"Creditcard"},
{id:4,value:"24x7"},
{id:5,value:"Parking"},
{id:6,value:"Free delivery"},
{id:7,value:"No Smoking"}
];
//For example assume that this is existing amenities from database
$scope.existamenities="1,3,7";
});
</script>
<htmL>
<div ng-app="myApp" ng-controller="myCtrl">
<div ng-repeat="amn in amenities">
<label>{{amn.value}}
<input type="checkbox" name="amenities" ng-value="amn.id">
</label>
</div>
</div>
</htmL>最佳答案
我相信要对其进行检查，您需要将ng-model设置为true或false。只需创建另一个数组并相应地填充它。
您可以选择在现有数组上附加新属性，以保留true / false值，或者创建一个从原始数组映射的新数组。如果列出了ID，则只需将默认的false值切换为true（可通过拆分字符串来获取）。
这是一个小演示：
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.amenities = [
{id:1,value:"Wifi"},
{id:2,value:"AC"},
{id:3,value:"Creditcard"},
{id:4,value:"24x7"},
{id:5,value:"Parking"},
{id:6,value:"Free delivery"},
{id:7,value:"No Smoking"}
];
//For example assume that this is existing amenities from database
$scope.existamenities = "1,3,7";
var a = $scope.existamenities.split(",").map(x => Number(x))
var b = $scope.amenities.map((x) => {
return {
"id": x.id,
"val": false
}
})
for (var i = 0; i < b.length; i++) {
for (var j = 0; j < a.length; j++) {
if (b[i].id == a[j]) {
b[i].val = true
}
}
}
$scope.model = b;
});<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
<div ng-repeat="amn in amenities">
<label>{{amn.value}}
<input type="checkbox" name="amenities" ng-model="model[$index].val" ng-value="amn.id">
</label>
</div>关于javascript - 如何使用Angular Js选中复选框值和存储在数据库中的现有逗号分隔值，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50694955/