路径必须是非空字符串，不能包含"."、"#"、"$"、"["或"]"

Question

我正在尝试注册firebase和ionic，但我从一开始就面临这个问题，

错误错误：Reference.child失败：第一个参数是无效路径="undefined"。路径必须是非空字符串，并且不能包含"."、"#"、"$"、"["或"]"、

有人能帮我拿吗

this is the provider:
import * as firebase from 'firebase';
import { Injectable } from '@angular/core';
/*
Generated class for the UserServiceProvider provider.
See https://angular.io/guide/dependency-injection for more info on providers
and Angular DI.
*/
@Injectable()
export class UserServiceProvider {
public data: any;
public fireAuth: any;
public userProfile: any;
constructor() {
console.log('Hello UserServiceProvider Provider');
this.fireAuth = firebase.auth();
	this.userProfile = firebase.database().ref(`email`);
}
signupUserService(account: {}){

return this.fireAuth.createUserWithEmailAndPassword(account[`email`], account[`password`]).then((newUser) => {
//sign in the user
this.fireAuth.signInWithEmailAndPassword(account[`email`], account[`password`]).then((authenticatedUser) => {
//successful login, create user profile
this.userProfile.child(authenticatedUser.uid).set(
account
);
});
});
}
}
------------------------------------------------------
this is my signUp page
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams, LoadingController, ToastController } from 'ionic-angular';
import { UserServiceProvider } from '../../providers/user-service/user-service';
import { HomePage } from '../home/home';
/**
* Generated class for the LoginPage page.
*
* See https://ionicframework.com/docs/components/#navigation for more info on
* Ionic pages and navigation.
*/
@IonicPage()
@Component({
selector: 'page-login',
templateUrl: 'login.html',
})
export class LoginPage {
public skills : string;
public email : string;
public phone : any;
public password : any;
public first_name : any;
public last_name : any;
public city : any;
public state : any;
public country : any;
public isJobSeeker : boolean;
constructor(public navCtrl: NavController,
public navParams: NavParams,
public usersserviceProvider : UserServiceProvider, 
public toastCtrl: ToastController, public loadingCtrl: LoadingController) {
}
ionViewDidLoad() {
console.log('ionViewDidLoad LoginPage');
}

doSignup(){
var   account = {
first_name: this.first_name,
last_name: this.last_name || '',
skills: this.skills || '',
email: this.email,
phone: this.phone || '',
password: this.password,
city: this.city || '',
state: this.state || '',
country: this.country || '',
isJobSeeker : this.country || ''
};
var that = this;
var loader = this.loadingCtrl.create({
content: "Please wait...",

});
loader.present();
	this.usersserviceProvider.signupUserService(account).then(authData => {
		//successful
		loader.dismiss();
		that.navCtrl.setRoot(HomePage);
	}, error => {
loader.dismiss();
// Unable to log in
let toast = this.toastCtrl.create({
message: error,
duration: 3000,
position: 'top'
});
toast.present();
that.password = ""//empty the password field
	});

}
}

this my html 
<ion-list>

<ion-item >
<ion-label stacked>Skill Set (separate with comma)</ion-label>
<ion-input type="text" [(ngModel)]="skills" name="skills" placeholder="eg. PHP, Writing, Chef" required="required"></ion-input>
</ion-item>

<ion-item>
<ion-label stacked>Email</ion-label>
<ion-input type="email" [(ngModel)]="email" name="email" placeholder="eg. [e-mail]"></ion-input>
</ion-item>
<ion-item >
<ion-label stacked>Phone</ion-label>
<ion-input type="text" [(ngModel)]="phone" name="phone" placeholder="eg. 0802222222" required="required"></ion-input>
</ion-item>



<ion-item>
<ion-label stacked>Password</ion-label>
<ion-input type="password" [(ngModel)]="password" name="password"></ion-input>
</ion-item>
<hr/>
<ion-item>
<ion-label stacked>First name</ion-label>
<ion-input type="text" [(ngModel)]="first_name" name="first_name"></ion-input>
</ion-item>

<ion-item>
<ion-label stacked>Last name</ion-label>
<ion-input type="text" [(ngModel)]="last_name" name="last_name"></ion-input>
</ion-item>

<ion-item>
<ion-label stacked>City</ion-label>
<ion-input type="text" [(ngModel)]="city" name="city"></ion-input>
</ion-item>
<ion-item>
<ion-label stacked>State/Province</ion-label>
<ion-input type="text" [(ngModel)]="state" name="state"></ion-input>
</ion-item>




<ion-item>
<ion-label>Looking for Job?</ion-label>
<ion-toggle [(ngModel)]="isJobSeeker" name="phone" checked="false"></ion-toggle>
</ion-item>

<div padding text-center>
<button ion-button color="danger" round (click)="doSignup()" >Signup</button>
</div>

</ion-list>

提前感谢

Answer 1

如果检查signInWithEmailAndPassword的文档，您将看到它返回一个UserCredential。检查文档可以发现它没有uid属性，这就解释了获得undefined的原因。

您需要使用authenticatedUser.user.uid，因此：

this.fireAuth.signInWithEmailAndPassword(account[`email`], account[`password`]).then((userCredential) => {
this.userProfile.child(userCredential.user.uid).set(
account
);
});

---

使用createUserWithEmailAndPassword创建新的用户帐户会自动登录，因此不需要嵌套这些调用。如果您(仅(希望在创建帐户时存储用户配置文件，createUserWithEmailAndPassword还会返回一个UserCredential。因此，你也需要间接到user.uid:

return this.fireAuth.createUserWithEmailAndPassword(account[`email`], account[`password`]).then((userCredential) => {
return this.userProfile.child(userCredential.user.uid).set(
account
);
});