javascript - 更新表单时无法读取 angularjs 中未定义的属性 '1'

Question

我正在尝试实现一个更新表单，但是当我点击提交按钮时，我经常遇到这个错误:

TypeError: Cannot read property '1' of undefined

这是我的 Controller :

$scope.pets = [];

$http.get(baseApiUrl + '/pets').
success(function (data) {
  console.log("Success : " + data);
  $scope.pets = data;
}).error(function () {
  console.log(data);
});

$scope.UpdateData = function (index) {      
    $http({
        method: 'PUT',
        url: baseApiUrl + '/pets/' + index,
        data: {
            id: index,
            name: $scope.updateName[index],
            age: $scope.updateAge[index],
            owner: $scope.updateOwner[index],
        }
    }).then(function successCallback(response) {
        console.log(response);
    }, function errorCallback(response) {
        console.log(response);
    });
};

这是我的观点:

<tbody>
    <tr ng-repeat="pet in pets track by pet.id">
        <td><input type="text" placeholder="{{ pet.name }}" name="name" class="form-control" ng-model="updateName[pet.id]" required></td>
        <td><input type="text" placeholder="{{ pet.age }}" name="age" class="form-control" ng-model="updateAge[pet.id]" required></td>
        <td><input type="text" placeholder="{{ pet.owner }}" name="owner" class="form-control" ng-model="updateOwner[pet.id]" required></td>
        <td><input id="update" type="submit" class="btn btn-danger disabled" ng-click="UpdateData(pet.id)" /></td>
    </tr>
</tbody>

我找不到为什么这不起作用。如果您有任何建议。谢谢

Answer 1

我问了一个与此主题相关的问题(但在 C# 中)Create dynamic variable name 请检查问题和答案。希望对您有所帮助。

对于我们不能在 C# 中创建动态变量，有一个答案。就像我们不能在 angularjs 中创建任何动态模型名称一样。

但在这种情况下，我们可以在 array(pets) 中动态创建一个新的对象名称。

请尝试以下方式

You need to change ng-model="pet.updateAge[pet.id]" to ng-model="pet.updateAge" and you can pass the pet object to your submit method via param ng-click="UpdateData(pet)"

    <tr ng-repeat="pet in pets track by pet.id">
    <td>
        <input type="text" placeholder="{{ pet.name }}"
        name="name" class="form-control" ng-model="pet.updateName"
        required>
    </td>
    <td>
        <input type="text" placeholder="{{ pet.age }}"
        name="age" class="form-control" ng-model="pet.updateAge"
        required>
    </td>
    <td>
        <input type="text" placeholder="{{ pet.owner }}"
        name="owner" class="form-control" ng-model="pet.updateOwner"
        required>
    </td>
    <td>
        <input id="update" type="submit" class="btn btn-danger disabled"
        ng-click="UpdateData(pet)" /></td></tr>

And you can get the values from the method param and you can use that as the below way

$scope.UpdateData = function (pet) {      
    $http({
        method: 'PUT',
        url: baseApiUrl + '/pets/' + pet.id,
        data: {
            id: pet.id,
            name: pet.updateName,
            age: pet.updateAge,
            owner: pet.updateOwner,
        }
    }).then(function successCallback(response) {
        console.log(response);
    }, function errorCallback(response) {
        console.log(response);
    });
};