Nativescript 2.2.0 更新后引发的未处理异常

Question

我刚刚更新到 Nativescript 2.2.0，一切都构建良好并且在我的大部分应用程序中运行良好。加载特定视图时，尽管我得到了以下未处理的异常以及堆栈跟踪。这在更新核心平台和模块之前不会发生。当我搜索堆栈跟踪中提到的 'disableNotifications' 属性时，我在我的项目中找不到任何此类内容。在做了一些挖掘之后似乎与核心框架有些不同，任何人有什么想法吗？

编辑：这是核心可观察模块中发生错误的实际代码块。他们是否删除了按以下方式添加属性的功能 var model = new Observable({propName: 'value'});?

Observable.js code where exception is thrown:
    Observable.prototype._setCore = function (data) {
        this.disableNotifications[data.propertyName] = true;
        var newValue = WrappedValue.unwrap(data.value);
        this[data.propertyName] = newValue;
        delete this.disableNotifications[data.propertyName];
    };

以下是我倾向于在我的视图模型中实例化我的 Observable 的方式：

var model = new Observable({
    measurements: new ObservableArray([]),
    recentMeasurement: {},
    notificationsEnabled: appSettings.getBoolean('notificationsEnabled', true),
    patientFirstName: "",
    patientLastName: "",
    units: "",
    hasMultipleConnections: true
});

另一个例子

var model = new Observable({        
    countries:  new ValueList([
        { ValueMember: "FR", DisplayMember: L('france') },
        { ValueMember: "DE", DisplayMember: L('germany') },
        { ValueMember: "IT", DisplayMember: L('italy') },
        { ValueMember: "NL", DisplayMember: L('netherlands') },
        { ValueMember: "ES", DisplayMember: L('spain') },
        { ValueMember: "SE", DisplayMember: L('sweden') },
        { ValueMember: "GB", DisplayMember: L('unitedkingdom') }]),  
    selectedCountry: 0,
    countryPlaceholder: L('select_country')
});

原始堆栈跟踪

com.tns.NativeScriptException:  Calling js method onTouch failed

TypeError: Cannot set property 'disableNotifications' of undefined
File: "/data/data/org.nativescript.CareGiver/files/app/tns_modules/ui/gestures/gestures.js", line: 97, column: 40

StackTrace:   Frame: function:'Observable._setCore',
file:'/data/data/org.nativescript.CareGiver/files/app/tns_modules/data/observable/observable.js',
line: 136, column: 54     Frame: function:'Observable.set',
file:'/data/data/org.nativescript.CareGiver/files/app/tns_modules/data/observable/observable.js',
line: 129, column: 14     Frame: function:'Observable',
file:'/data/data/org.nativescript.CareGiver/files/app/tns_modules/data/observable/observable.js',
line: 50, column: 26  Frame: function:'Observable',
file:'/data/data/org.nativescript.CareGiver/files/app/tns_modules/data/observable/observable.js',
line: 47, column: 38  Frame: function:'MeasurementViewModel',
file:'/data/data/org.nativescript.CareGiver/files/app/models/measurement-view-model.js',
line: 16, column:
file:'/data/data/org.nativescript.CareGiver/files/app/models/measurement-view-model.js',
line: 16, column:

Answer 1

所以，在我的例子中，问题似乎是由于嵌套的 Observable。通过删除嵌套的可观察对象，不再抛出异常：

老办法

var model = new Observable({
    measurements: new ObservableArray([]),
    recentMeasurement: {},
    notificationsEnabled: appSettings.getBoolean('notificationsEnabled', true),
    patientFirstName: "",
    patientLastName: "",
    units: "",
    hasMultipleConnections: true
});

新方式

var model = new Observable({
    measurements: [],
    recentMeasurement: {},
    notificationsEnabled: appSettings.getBoolean('notificationsEnabled', true),
    patientFirstName: "",
    patientLastName: "",
    units: "",
    hasMultipleConnections: true
});

此更改似乎还导致我安装和使用的一些插件出现问题。你可以看到这个提到here on Github

Nativescript 2.2.0 更新后引发的未处理异常

Unhanded Exception thrown following Nativescript 2.2.0 update

android

nativescript