javascript - Polymer 1.X - 复杂的观察者不开火

Question

我对所有对象的子属性都有一个复杂的观察者，但它从未触发，我不明白为什么..

//Declaration's property
requirement: {
    type:Object,
    value: {
        allLoaded: false,
        tagsLoaded: false
    }
},

//Complex observer
observers: [
  'requirementChanged(requirement.*)'
],

//Observer definition
requirementChanged: function(val){
    console.log('obs : ', this.requirement, val);//Just to see what's in there
},

//The action that should trigger the observer 
if(res.length > 0)
{
    this.sharedInfo.assetTags = res;
    this.set('requirement.tagsLoaded', true);
    this.notifyPath('requirement.tagsLoaded');
}

谢谢大家，祝你有个愉快的一天

Answer 1

您的属性声明的设置方式使其有效非通知。
您必须在 Polymer 的属性声明上设置 notify 以传播可观察到的更改触发器。
来自 Polymer 1.x 文档 -

notify - A notifying property supports upward data flow. By default, properties are non-notifying, and don't support upward data flow.

尝试将属性声明更改为 -

//Declaration's property
requirement: {
    type:Object,
    value: {
        allLoaded: false,
        tagsLoaded: false
    },
    notify: true
}

这里是进一步阅读 Observable and Unobservable changes