我正在从组件内部调用一个服务方法,它返回一个Promise。如果承诺得到解决或拒绝,我想做不同的事情。我是这样做的:
调用服务方法的函数
onAddProvider() {
this.userInteraction.addContact(data.email, 'bp').then(
successMessage => {
doSomething();
},
failureMessage => {
doSomethingElse();
});
}
服务方法
addContact(email: string, type: string) {
return new Promise((resolve, reject) => {
if (!email.match(patterns.email)) {
return Promise.reject('Bad email address');
}
let data = {
to: email,
from: this.dataStorage.data.id,
type: type,
date: new Date().getTime()
};
this.http.post(`${serverURL}action=sendAddRequest&token=${localStorage['token']}`, JSON.stringify(data))
.map((res: Response) => res.text())
.subscribe(response => {
resolve('Request sent');
});
});
}
我希望在返回Promise.reject时运行failureMessage
函数,但我在控制台中收到此错误:
EXCEPTION: Error: Uncaught (in promise): Bad email address
答案 0 :(得分:1)
替换:
return Promise.reject('Bad email address');
与
return reject('Bad email address');
答案 1 :(得分:0)
也可以拒绝抛出错误。
throw "Error";