我查看了许多资源,包括this,this和this,但我未能达到预期效果。
我要做的就是验证用户身份(使用firebase),然后进行身份验证后,加载他们的个人资料并将其存储在变量userProfile
中,然后再加载下一页控制板:
我的登录服务:
public signinUser(user: User) {
this.af.auth.login({
email: user.email,
password: user.password
},
{
provider: AuthProviders.Password,
method: AuthMethods.Password
}
)
.then(
success => {
console.log('Authenticated');
this.getProfile().subscribe( // PROBLEM is here
profile => {
console.log(profile);
console.log('Profile Loaded');
this.router.navigate(['/dashboard']);
}
)
}
)
.catch(function (error) {
...
console.log('ERROR SIGNING USER IN');
}
我的getProfile()
方法:
public getProfile(): Observable<any> {
return this.af.database.object('/profiles/' + this.user.uid)
.flatMap(
profile => {
console.log('inside success');
console.log(profile);
this.userProfile = <User>profile;
console.log('getProfile has completed');
return profile;
},
error => {
console.log(error)
});
这是日志的一部分:
Authenticated
auth.service.ts:104 ERROR SIGNING USER IN
auth.service.ts:105 TypeError: Cannot read property 'subscribe' of undefined
at auth.service.ts:91
at ZoneDelegate.invoke (zone.js:232)
at Object.onInvoke (ng_zone.js:238)
at ZoneDelegate.invoke (zone.js:231)
at Zone.run (zone.js:114)
at zone.js:502
at ZoneDelegate.invokeTask (zone.js:265)
at Object.onInvokeTask (ng_zone.js:229)
at ZoneDelegate.invokeTask (zone.js:264)
at Zone.runTask (zone.js:154)
auth.service.ts:106 Cannot read property 'subscribe' of undefined
auth.service.ts:184 inside success
auth.service.ts:185 Object {confirmPassword: "123123", email: "aaa@gmail.com2", github: "aaa" name: "a", password: "123123"…}
auth.service.ts:188
getProfile has completed()
auth.service.ts:185
我可以看到这些方法分别按预期工作。用户进行身份验证,并加载配置文件(显示在日志中)。问题在于订阅事件,原因我不知道。
答案 0 :(得分:4)
我认为问题是getProfile
并没有真正返回Observable
。
您使用flatMap
,因此您可以链接可观察序列并将配置文件作为可观察对象返回。但为了使其工作,flatMap
内的回调应该返回一个promise或一个observable(正如我从this answer中学到的)。否则,可观察链就会被打破。
所以你可能需要做的是:
public getProfile(): Observable<any> {
return this.af.database.object('/profiles/' + this.user.uid)
.flatMap(
profile => {
console.log('inside success');
console.log(profile);
this.userProfile = <User>profile;
console.log('getProfile has completed');
return Promise.resolve(profile);//<-- this is what needs to be changed
},
error => {
console.log(error)
});
答案 1 :(得分:4)
好的,这很奇怪,但我重新启动了webpack,似乎已经解决了这个问题。
这是代码的外观,它通过promise正确地进行身份验证,然后在成功时加载配置文件然后加载下一页:
我的signinUser
方法:
public signinUser(user: User) {
this.af.auth.login({
email: user.email,
password: user.password
},
{
provider: AuthProviders.Password,
method: AuthMethods.Password
}
)
.then(
success => {
console.log('Authenticated');
this.getProfile().subscribe(
profile => {
this.router.navigate(['/dashboard']);
},
error => console.log(error)
)
我的getProfile
方法:
public getProfile(): Observable<User> {
return this.af.database.object('/profiles/' + this.user.uid)
.map(
profile => {
console.log('inside success');
console.log(profile);
this.userProfile = <User>profile;
console.log(this.userProfile);
return profile;
},
error => {
console.log(error)
});
}
callstack:
- 用户已通过身份验证
- 订阅getProfile并等待方法完成...
- GetProfile()方法执行
- 个人资料已设置
- 页面已重定向
醇>