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How convert FirebaseUser to string in flutter?

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0

Here is my code of a stateful class:

String id = FirebaseAuth.instance.currentUser().toString();

my function :

readLocal() async 
 prefs = await SharedPreferences.getInstance();
 id = prefs.getString('id') ?? '';
 if (id.hashCode <= peerId.hashCode) 
 groupChatId = '$id-$peerId';
 else 
 groupChatId = '$peerId-$id';
 
 setState(() );

It works fine in String id.

I want the ID to be the same as the current user UID.

flutter firebase-authentication

share|improve this question

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

add a comment | 

0

Here is my code of a stateful class:

String id = FirebaseAuth.instance.currentUser().toString();

my function :

readLocal() async 
 prefs = await SharedPreferences.getInstance();
 id = prefs.getString('id') ?? '';
 if (id.hashCode <= peerId.hashCode) 
 groupChatId = '$id-$peerId';
 else 
 groupChatId = '$peerId-$id';
 
 setState(() );

It works fine in String id.

I want the ID to be the same as the current user UID.

flutter firebase-authentication

share|improve this question

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

add a comment | 

Here is my code of a stateful class:

String id = FirebaseAuth.instance.currentUser().toString();

my function :

readLocal() async 
 prefs = await SharedPreferences.getInstance();
 id = prefs.getString('id') ?? '';
 if (id.hashCode <= peerId.hashCode) 
 groupChatId = '$id-$peerId';
 else 
 groupChatId = '$peerId-$id';
 
 setState(() );

It works fine in String id.

I want the ID to be the same as the current user UID.

flutter firebase-authentication

share|improve this question

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

String id = FirebaseAuth.instance.currentUser().toString();

readLocal() async 
 prefs = await SharedPreferences.getInstance();
 id = prefs.getString('id') ?? '';
 if (id.hashCode <= peerId.hashCode) 
 groupChatId = '$id-$peerId';
 else 
 groupChatId = '$peerId-$id';
 
 setState(() );

flutter firebase-authentication

flutter firebase-authentication

share|improve this question

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

share|improve this question

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

edited Mar 25 at 14:23

Frank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

asked Mar 25 at 13:27

richierichie

3888 bronze badges

1 Answer
1

active

oldest

votes

0

Calling FirebaseAuth.instance.currentUser() return a FirebaseUser, which is an object with all user data. If you only want the UID of the user:

FirebaseUser user = await FirebaseAuth.instance.currentUser();
String uid = user.uid;

---

Update: I just ran this and it prints the UID for me:

void _getUser() async 
 FirebaseUser user = await FirebaseAuth.instance.currentUser();
 print(user.uid);

Which printed:

flutter: P07IXLCrwEahYlDhzO1Iv0SKDat2

Things to notice:

• In order to be able to use await in the code, the method must be marked as async.

share|improve this answer

edited Mar 27 at 1:43

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Error is : The getter 'uid' isn't defined for the class 'Future<FirebaseUser>'.dart(undefined_getter)
  
  – richie
  Mar 25 at 14:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Got it. currentUser is asynchronous, so you'll need to await the result. I updated my answer.
  
  – Frank van Puffelen
  Mar 25 at 14:54
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Again error : A value of type 'Future<FirebaseUser>' can't be assigned to a variable of type 'FirebaseUser'.dart(invalid_assignment)
  
  – richie
  Mar 25 at 15:51
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you sure you added the await keyword? That should unwrap the Future<FirebaseUser> into FirebaseUser.
  
  – Frank van Puffelen
  Mar 25 at 17:03
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes, here is my code FirebaseUser user = await FirebaseAuth.instance.currentUser(); String uid = user.uid;
  
  – richie
  Mar 25 at 17:07
  

  
  
  
  

 | 
show 2 more comments

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0

Calling FirebaseAuth.instance.currentUser() return a FirebaseUser, which is an object with all user data. If you only want the UID of the user:

FirebaseUser user = await FirebaseAuth.instance.currentUser();
String uid = user.uid;

---

Update: I just ran this and it prints the UID for me:

void _getUser() async 
 FirebaseUser user = await FirebaseAuth.instance.currentUser();
 print(user.uid);

Which printed:

flutter: P07IXLCrwEahYlDhzO1Iv0SKDat2

Things to notice:

• In order to be able to use await in the code, the method must be marked as async.

share|improve this answer

edited Mar 27 at 1:43

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Error is : The getter 'uid' isn't defined for the class 'Future<FirebaseUser>'.dart(undefined_getter)
  
  – richie
  Mar 25 at 14:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Got it. currentUser is asynchronous, so you'll need to await the result. I updated my answer.
  
  – Frank van Puffelen
  Mar 25 at 14:54
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Again error : A value of type 'Future<FirebaseUser>' can't be assigned to a variable of type 'FirebaseUser'.dart(invalid_assignment)
  
  – richie
  Mar 25 at 15:51
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you sure you added the await keyword? That should unwrap the Future<FirebaseUser> into FirebaseUser.
  
  – Frank van Puffelen
  Mar 25 at 17:03
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes, here is my code FirebaseUser user = await FirebaseAuth.instance.currentUser(); String uid = user.uid;
  
  – richie
  Mar 25 at 17:07
  

  
  
  
  

 | 
show 2 more comments

0

Calling FirebaseAuth.instance.currentUser() return a FirebaseUser, which is an object with all user data. If you only want the UID of the user:

FirebaseUser user = await FirebaseAuth.instance.currentUser();
String uid = user.uid;

---

Update: I just ran this and it prints the UID for me:

void _getUser() async 
 FirebaseUser user = await FirebaseAuth.instance.currentUser();
 print(user.uid);

Which printed:

flutter: P07IXLCrwEahYlDhzO1Iv0SKDat2

Things to notice:

• In order to be able to use await in the code, the method must be marked as async.

share|improve this answer

edited Mar 27 at 1:43

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Error is : The getter 'uid' isn't defined for the class 'Future<FirebaseUser>'.dart(undefined_getter)
  
  – richie
  Mar 25 at 14:42
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Got it. currentUser is asynchronous, so you'll need to await the result. I updated my answer.
  
  – Frank van Puffelen
  Mar 25 at 14:54
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Again error : A value of type 'Future<FirebaseUser>' can't be assigned to a variable of type 'FirebaseUser'.dart(invalid_assignment)
  
  – richie
  Mar 25 at 15:51
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you sure you added the await keyword? That should unwrap the Future<FirebaseUser> into FirebaseUser.
  
  – Frank van Puffelen
  Mar 25 at 17:03
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes, here is my code FirebaseUser user = await FirebaseAuth.instance.currentUser(); String uid = user.uid;
  
  – richie
  Mar 25 at 17:07
  

  
  
  
  

 | 
show 2 more comments

Calling FirebaseAuth.instance.currentUser() return a FirebaseUser, which is an object with all user data. If you only want the UID of the user:

FirebaseUser user = await FirebaseAuth.instance.currentUser();
String uid = user.uid;

---

Update: I just ran this and it prints the UID for me:

void _getUser() async 
 FirebaseUser user = await FirebaseAuth.instance.currentUser();
 print(user.uid);

Which printed:

flutter: P07IXLCrwEahYlDhzO1Iv0SKDat2

Things to notice:

• In order to be able to use await in the code, the method must be marked as async.

share|improve this answer

edited Mar 27 at 1:43

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

FirebaseUser user = await FirebaseAuth.instance.currentUser();
String uid = user.uid;

void _getUser() async 
 FirebaseUser user = await FirebaseAuth.instance.currentUser();
 print(user.uid);

share|improve this answer

edited Mar 27 at 1:43

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges

answered Mar 25 at 14:25

Frank van PuffelenFrank van Puffelen

260k3333 gold badges419419 silver badges441441 bronze badges