Retrieve data on user role from Firebase before log-in












0















I am trying to creating a condition which checks the user's account role (student or teacher) before directing to a specific root page. My code for my loginUser function is below. The problem is I am getting undefined for the role.



loginUser(): void {
if (!this.loginForm.valid) {
console.log(
`Form is not valid yet, current value: ${this.loginForm.value}`
);
} else {
const email = this.loginForm.value.email;
const password = this.loginForm.value.password;
var role, datas;

console.log(role);
this.authProvider.loginUser(email, password).then(
authData => {
this.loading.dismiss().then(() => {
firebase.database().ref().child("userProfile").on('value', function(snapshot) {
snapshot.forEach(function(child) {
datas = child.val();
role = child.val().role;
});
});

if (role === 'student') {
this.navCtrl.setRoot(StudentRootPage);
} else if (role === 'teacher') {
this.navCtrl.setRoot(TeacherRootPage);
}
});
},
error => {
this.loading.dismiss().then(() => {
const alert: Alert = this.alertCtrl.create({
message: error.message,
buttons: [{ text: 'Ok', role: 'cancel' }]
});
alert.present();
});
}
);
this.loading = this.loadingCtrl.create();
this.loading.present();
}
}


How could I implement this










share|improve this question



























    0















    I am trying to creating a condition which checks the user's account role (student or teacher) before directing to a specific root page. My code for my loginUser function is below. The problem is I am getting undefined for the role.



    loginUser(): void {
    if (!this.loginForm.valid) {
    console.log(
    `Form is not valid yet, current value: ${this.loginForm.value}`
    );
    } else {
    const email = this.loginForm.value.email;
    const password = this.loginForm.value.password;
    var role, datas;

    console.log(role);
    this.authProvider.loginUser(email, password).then(
    authData => {
    this.loading.dismiss().then(() => {
    firebase.database().ref().child("userProfile").on('value', function(snapshot) {
    snapshot.forEach(function(child) {
    datas = child.val();
    role = child.val().role;
    });
    });

    if (role === 'student') {
    this.navCtrl.setRoot(StudentRootPage);
    } else if (role === 'teacher') {
    this.navCtrl.setRoot(TeacherRootPage);
    }
    });
    },
    error => {
    this.loading.dismiss().then(() => {
    const alert: Alert = this.alertCtrl.create({
    message: error.message,
    buttons: [{ text: 'Ok', role: 'cancel' }]
    });
    alert.present();
    });
    }
    );
    this.loading = this.loadingCtrl.create();
    this.loading.present();
    }
    }


    How could I implement this










    share|improve this question

























      0












      0








      0








      I am trying to creating a condition which checks the user's account role (student or teacher) before directing to a specific root page. My code for my loginUser function is below. The problem is I am getting undefined for the role.



      loginUser(): void {
      if (!this.loginForm.valid) {
      console.log(
      `Form is not valid yet, current value: ${this.loginForm.value}`
      );
      } else {
      const email = this.loginForm.value.email;
      const password = this.loginForm.value.password;
      var role, datas;

      console.log(role);
      this.authProvider.loginUser(email, password).then(
      authData => {
      this.loading.dismiss().then(() => {
      firebase.database().ref().child("userProfile").on('value', function(snapshot) {
      snapshot.forEach(function(child) {
      datas = child.val();
      role = child.val().role;
      });
      });

      if (role === 'student') {
      this.navCtrl.setRoot(StudentRootPage);
      } else if (role === 'teacher') {
      this.navCtrl.setRoot(TeacherRootPage);
      }
      });
      },
      error => {
      this.loading.dismiss().then(() => {
      const alert: Alert = this.alertCtrl.create({
      message: error.message,
      buttons: [{ text: 'Ok', role: 'cancel' }]
      });
      alert.present();
      });
      }
      );
      this.loading = this.loadingCtrl.create();
      this.loading.present();
      }
      }


      How could I implement this










      share|improve this question














      I am trying to creating a condition which checks the user's account role (student or teacher) before directing to a specific root page. My code for my loginUser function is below. The problem is I am getting undefined for the role.



      loginUser(): void {
      if (!this.loginForm.valid) {
      console.log(
      `Form is not valid yet, current value: ${this.loginForm.value}`
      );
      } else {
      const email = this.loginForm.value.email;
      const password = this.loginForm.value.password;
      var role, datas;

      console.log(role);
      this.authProvider.loginUser(email, password).then(
      authData => {
      this.loading.dismiss().then(() => {
      firebase.database().ref().child("userProfile").on('value', function(snapshot) {
      snapshot.forEach(function(child) {
      datas = child.val();
      role = child.val().role;
      });
      });

      if (role === 'student') {
      this.navCtrl.setRoot(StudentRootPage);
      } else if (role === 'teacher') {
      this.navCtrl.setRoot(TeacherRootPage);
      }
      });
      },
      error => {
      this.loading.dismiss().then(() => {
      const alert: Alert = this.alertCtrl.create({
      message: error.message,
      buttons: [{ text: 'Ok', role: 'cancel' }]
      });
      alert.present();
      });
      }
      );
      this.loading = this.loadingCtrl.create();
      this.loading.present();
      }
      }


      How could I implement this







      firebase ionic-framework firebase-realtime-database ionic3 firebase-authentication






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      asked Nov 25 '18 at 11:23









      angielleangielle

      184




      184
























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