Question

这里有角度的新手，我有一个ng-repeat列表，其中包含触发删除功能的ng-click =“remove（item）”按钮：

$scope.remove = function (item) {
        console.log(item);
        $scope.items.$remove(item);
};

$ scope.items。$ remove（）;适用于删除模型中的所有项目。我不确定为什么如果我通过一个物品去除它会给我一个错误。以下是我得到的错误。

Error: Firebase.child failed: First argument was an invalid path: "[object Object]". Paths must be non-empty strings and can't contain ".", "#", "$", "[", or "]"
    at Error (<anonymous>)
    at Ga (https://cdn.firebase.com/v0/firebase.js:12:230)
    at H.J.F (https://cdn.firebase.com/v0/firebase.js:134:213)
    at Object.object.$remove (https://cdn.firebase.com/libs/angularfire/0.5.0/angularfire.js:160:26)
    at Scope.MyCtrl.$scope.removeShape (http://127.0.0.1:9000/scripts/controllers/main.js:24:23)
    at http://127.0.0.1:9000/bower_components/angular/angular.js:9977:21
    at http://127.0.0.1:9000/bower_components/angular/angular.js:17678:17
    at Scope.$eval (http://127.0.0.1:9000/bower_components/angular/angular.js:11668:28)
    at Scope.$apply (http://127.0.0.1:9000/bower_components/angular/angular.js:11768:23)
    at Scope.$delegate.__proto__.$apply (<anonymous>:855:30) angular.js:9193
(anonymous function) angular.js:9193
(anonymous function) angular.js:6746
Scope.$apply angular.js:11770
$delegate.__proto__.$apply VM21684:855
(anonymous function) angular.js:17677
jQuery.event.dispatch jquery-1.9.1.js:3074
elemData.handle

提前感谢您帮助我了解正在发生的事情。

Answer 1

$remove将字符串作为参数，要删除的子项的键名，而不是对象本身。迭代两者 ng-repeat中的键和值，这样您就可以访问该键。例如：

<div ng-repeat="(key, item) in items">
  <a ng-click="remove(key)">Remove</a>
</div>

Answer 2

你也可以使用#include <iostream> #include <cstring> int main(void) { int id = 12; int age = 14; const size_t size = sizeof(int); unsigned char* pData = new unsigned char[2*size]; memcpy(pData,&id,size);/* using memcpy to copy */ pData = pData + size; memcpy(pData,&age,size);/* using memcpy to copy */ std::cout<<*reinterpret_cast<int*>(pData)<<std::endl; pData = pData - size; std::cout<<*reinterpret_cast<int*>(pData)<<std::endl; delete []pData; return 0; }键中的“build”，你可以在angular ng-repeat中使用它，并将$ index传递给你的remove方法：

$index

AngularFire 0.5 $删除。错误：Firebase.child失败：第一个参数是无效路径

2 个答案: