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我有以下问题。Resolving Promise Angular 2
在函数中我有一个承诺作为返回类型。该功能位于类层次结构中。
updateNodeValues(entity: String, data: {}): Promise<any>{
let jsonBody = JSON.stringify(data);
let url = environment.endpointCore + '/api/' + entity + '/' + data['id'];
return this.http.put(url, jsonBody, this.options)
.toPromise()
.then(response => {
return response;
})
.catch(this.handleError);
}
此函数在类节点中。
onSubmit(): void{
var currentForm = this.form.value;
var entityName = this.inflection.classify(this.node.type).toLowerCase();
var requiredData = {};
for(var i = 0; i < this.formItems.length; i++){
this.formItems[i].value = currentForm[Object.keys(currentForm)[i]];
}
for(var i=0; i<this.formItems.length; i++){
requiredData[this.globalService.camelize(this.formItems[i].label)] = this.formItems[i].value
}
Promise.resolve(this.hierarchyService.updateNodeValues(entityName, requiredData)).then(response => {
alert(response.ok);
if(response.ok){
this.globalService.showSuccessMessage('Values updated');
this.refreshGui(requiredData);
}
});
this.editMode = false;
}
的问题是,当我试图解决的承诺,并调用this.refreshGui(requireddata)
什么也没有发生。我已经阅读了关于脂肪箭头如何保留这个“上下文”,我不明白为什么调用这个方法没有做任何事情,而调用successMessage
产生预期的结果。
我调用的方法如下所示,它也在类节点中。
private refreshGui(data: {}){
this._node.data = data;
this.objectProperties = new Array();
this.nodeChildren = new Array();
for (var property in data) {
var propertyValue = data[property];
if (propertyValue instanceof Array) {
this.nodeChildren.push({label: property, value: "total: ".concat(propertyValue.length.toString())});
} else {
this.objectProperties.push({label: property, value: propertyValue});
}
}
}