Flutter Firestore adding data - firebase

Question

I want to add data on firestore and it wont work. can somebody help me.
This is the newest updated version and I can't figure out how...
firebase_auth: ^0.18.0+1 cloud_firestore: ^0.14.0+2
This is the sign up screen so I want to send data after I create the email and password.
I want to add the document with user uid too.
onPressed: () async {
try {
UserCredential userCredential = await FirebaseAuth
.instance
.createUserWithEmailAndPassword(
email: _emailController.text,
password: _passwordController.text,
);
if (userCredential != null) {
firestore
.collection("user")
.doc('user.uid')
.set({
'username': username,
'email': email,
})
.then((value) => print("User Added"))
.catchError((error) =>
print("Failed to add user: $error"));
Navigator.of(context).pushNamed(AppRoutes.authLogin);
}
} catch (e) {
print(e);
_usernameController.text = "";
_passwordController.text = "";
_repasswordController.text = "";
_emailController.text = "";
//TODO: alertdialog with error
}
setState(() {
saveAttempted = true;
});
if (_formKey.currentState.validate()) {
_formKey.currentState.save();
}
},
Can someone help me with the firestore.. Thank you..

Answer 1

First Create a User class.
class UserData {
final String userId;
final String fullNames;
final String email;
final String phone;
UserData(
{this.userId,
this.fullNames,
this.email,
this.phone});
Map<String, dynamic> getDataMap() {
return {
"userId": userId,
"fullNames": fullNames,
"email": email,
"phone": phone,
};
}
}
Then you can use a function like this one to save the credentials and save the data to firestore
createOrUpdateUserData(Map<String, dynamic> userDataMap) async {
FirebaseUser user = await FirebaseAuth.instance.currentUser();
DocumentReference ref =
Firestore.instance.collection('user').document(user.uid);
return ref.setData(userDataMap, merge: true);
}
==
bool validateAndSave() {
final form = _formKey.currentState;
if (form.validate()) {
form.save();
return true;
}
return false;
}
void validateAndSubmit() async {
if (validateAndSave()) {
try {
String userId = _formType == FormType.login
? await widget.auth.signIn(_email, _password)//use your signin
: await widget.auth.signUp(_email, _password);//use your signup
if (_formType == FormType.register) {
UserData userData = new UserData(
fullNames: _fullNames,
email: _email,
phone: "",
);
createOrUpdateUserData(userData.getDataMap());
}
} catch (e) {
setState(() {
_isLoading = false;
switch (e.code) {
case "ERROR_INVALID_EMAIL":
_authHint = "Your email address appears to be malformed.";
break;
case "ERROR_EMAIL_ALREADY_IN_USE":
_authHint = "Email address already used in a different account.";
break;
case "ERROR_WRONG_PASSWORD":
_authHint = "Your password is wrong.";
break;
case "ERROR_USER_NOT_FOUND":
_authHint = "User with this email doesn't exist.";
break;
case "EMAIL NOT VERIFIED":
_authHint = "Email not verified: Please go to yor email and verify";
break;
case "ERROR_USER_DISABLED":
_authHint = "User with this email has been disabled.";
break;
case "ERROR_TOO_MANY_REQUESTS":
_authHint =
"Too many Attemps. Account has temporarily disabled.\n Try again later.";
break;
case "ERROR_OPERATION_NOT_ALLOWED":
_authHint = "Signing in with Email and Password is not enabled.";
break;
case "ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL":
_authHint = "The email is in use by another account";
break;
default:
_authHint = "An undefined Error happened.";
}
});
print(e);
errorDialog(context, _authHint);
}
} else {
setState(() {
_authHint = '';
});
}
}
Then use
onpressed:(){
validateAndSubmit();
}
the formtype is an Enum
enum FormType { login, register, reset }
widget.auth.signIn and widget.auth.signUp should be replaced with your signin and signup respectively.
Added a custom error block to differentiate firebase auth errors as well.
Defining an auth page independently will help you reuse your code in future.