AngularJS-無法總結范圍內的屬性

Question

我在角度控制器中有以下角度代碼：

碼：

$scope.orangeCrate.italian = {
    "description": "Annual",
    "payer": "farmer",
    "farmerCost": 0,
    "ownerCost": 21
};

$scope.orangeCrate.portugal = {
    "description": "Annual",
    "payer": "owner",
    "farmerCost": 6.5,
    "ownerCost": 0
};

$scope.orangeCrate.total = {
    "farmerCost": $scope.orangeCrate.italian.farmerCost + $scope.orangeCrate.portugal.farmerCost,
    "ownerCost": $scope.orangeCrate.italian.ownerCost + $scope.orangeCrate.portugal.ownerCost,
};

當我嘗試將$scope.orangeCrate.total.farmerCost的值打印到我的視圖中時，我什么也沒得到，即使我應該得到6.5 ！

我究竟做錯了什么？

Answer 1

這樣的事情會做（對“可憐”的回答很抱歉。.我很着急）：

$scope.orangeCrate = {
    "italian": {
        "description": "Annual",
            "payer": "farmer",
            "farmerCost": 0,
            "ownerCost": 21
    },
        "portugal": {
        "description": "Annual",
            "payer": "owner",
            "farmerCost": 6.5,
            "ownerCost": 0
    }
};
$scope.orangeCrate.total = {
    "farmerCost": $scope.orangeCrate.italian.farmerCost + $scope.orangeCrate.portugal.farmerCost,
        "ownerCost": $scope.orangeCrate.italian.ownerCost + $scope.orangeCrate.portugal.ownerCost,
};