How can one retrieve the "code" attribute from a FirebaseError object in AngularFire using TypeScript?

Question

How can one retrieve the "code" attribute from a FirebaseError object in AngularFire using TypeScript?

When using FirebaseError with a "code" property, how can you access it within the catch method of a promise? The code snippet below results in a TypeScript error:

Property 'code' does not exist on type 'Error'.

this.af.database
.object(`/some/path`)
.set(newObj)
.then(data => {
  console.log('success');
})
.catch(err => {
  // Property 'code' does not exist on type 'Error'.
  console.log(`code`, err.code);
});

angular typescript firebase angularfire

Answer 1

Answer №1

If you're looking for a solution, consider importing the global FirebaseError from the '@firebase/util' package and using a type guard as shown below.

import { FirebaseError } from '@firebase/util'

try {
    // Execute some firebase functions
    await signInWithEmailAndPassword(auth, email, password)
} catch (error: unknown) {
   if (error instanceof FirebaseError) {
      console.error(error.code)
   }
}

Answer 2

If you're looking for a solution, consider importing the global FirebaseError from the '@firebase/util' package and using a type guard as shown below.

import { FirebaseError } from '@firebase/util'

try {
    // Execute some firebase functions
    await signInWithEmailAndPassword(auth, email, password)
} catch (error: unknown) {
   if (error instanceof FirebaseError) {
      console.error(error.code)
   }
}

Answer 3

Answer №2

If you want to retrieve the code attribute, make sure to include firebase in your project and assign the error a type of firebase.FirebaseError. Here is an example:

import { AngularFire } from 'angularfire2';
import firebase from 'firebase';

...

constructor(
  private af: AngularFire
) {}

...

this.af.database
.object(`/specific/path`)
.set(newObject)
.then(result => {
  console.log('Operation successful');
})
.catch( (error: firebase.FirebaseError) => {
  // Assigning the error the FirebaseError type will grant access to its properties
  console.log(`code`, error.code);
  console.log(`message`, error.message);
  console.log(`name`, error.name);
  console.log(`stack`, error.stack);
});

Answer 4

If you want to retrieve the code attribute, make sure to include firebase in your project and assign the error a type of firebase.FirebaseError. Here is an example:

import { AngularFire } from 'angularfire2';
import firebase from 'firebase';

...

constructor(
  private af: AngularFire
) {}

...

this.af.database
.object(`/specific/path`)
.set(newObject)
.then(result => {
  console.log('Operation successful');
})
.catch( (error: firebase.FirebaseError) => {
  // Assigning the error the FirebaseError type will grant access to its properties
  console.log(`code`, error.code);
  console.log(`message`, error.message);
  console.log(`name`, error.name);
  console.log(`stack`, error.stack);
});

Answer 5

Answer №3

Although the workaround suggested by Patrickmcd may work, it is not the most optimal solution. Depending on importing the firebase object to ensure the correct type on the Error Object goes against the purpose of the Angular Fire Module. It also unnecessarily increases the size of your application. Please refer to the bug report at the following link: https://github.com/angular/angularfire2/issues/666

This issue is expected to be resolved in beta 7.

My workaround using Bracket Notation and String Literals eliminates the need to import the Firebase library.

Below is an example:

 this.af.auth.login({
      email: this.userEmail,
      password: this.userPassword
    }).catch(error => {
      // Retrieve the firebase Error Code as documented here: https://firebase.google.com/docs/reference/js/firebase.auth.Error
      console.log(error['code']);
      // Get the firebase message associated with the Error Code
      console.log(error['message']);

      // Display failed login validation
      this.loginFailed = true;

    });

I hope this information proves useful!

Answer 6

Although the workaround suggested by Patrickmcd may work, it is not the most optimal solution. Depending on importing the firebase object to ensure the correct type on the Error Object goes against the purpose of the Angular Fire Module. It also unnecessarily increases the size of your application. Please refer to the bug report at the following link: https://github.com/angular/angularfire2/issues/666

This issue is expected to be resolved in beta 7.

My workaround using Bracket Notation and String Literals eliminates the need to import the Firebase library.

Below is an example:

 this.af.auth.login({
      email: this.userEmail,
      password: this.userPassword
    }).catch(error => {
      // Retrieve the firebase Error Code as documented here: https://firebase.google.com/docs/reference/js/firebase.auth.Error
      console.log(error['code']);
      // Get the firebase message associated with the Error Code
      console.log(error['message']);

      // Display failed login validation
      this.loginFailed = true;

    });

I hope this information proves useful!

Answer 7

Answer №4

When utilizing separate Firebase modules, each module comes with its own unique error type.

import { FirestoreError } from 'firebase/firestore'

.catch( (err: FirestoreError) => {
  // Assign the firebase.firestore.Error type to your error
  // to access all of the Error properties
  console.log(`code`, err.code);
  console.log(`message`, err.message);
  console.log(`name`, err.name);
  console.log(`stack`, err.stack);
});

Answer 8

When utilizing separate Firebase modules, each module comes with its own unique error type.

import { FirestoreError } from 'firebase/firestore'

.catch( (err: FirestoreError) => {
  // Assign the firebase.firestore.Error type to your error
  // to access all of the Error properties
  console.log(`code`, err.code);
  console.log(`message`, err.message);
  console.log(`name`, err.name);
  console.log(`stack`, err.stack);
});

How can one retrieve the "code" attribute from a FirebaseError object in AngularFire using TypeScript?

Answer №1

Answer №2

Answer №3

Answer №4

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