StreamBuilder builder error

[mahi042]

[kevmiclee]

https://stackoverflow.com/questions/64186306/closure-call-with-mismatched-arguments-function-in-flutter

This worked for me.

  final messageText = message.data()['text'];
  final messageSender = message.data()['sender'];

[sulavchhetri]

https://stackoverflow.com/questions/64186306/closure-call-with-mismatched-arguments-function-in-flutter

This worked for me.

  final messageText = message.data()['text'];
  final messageSender = message.data()['sender'];

Unfortunaltely this code doesnot work for me. It says the method '[]' can't be unconditionally invoked because the receiver can be 'null' and when i add the null check sign it says the operator '[]' isn't defined for the type 'Object'.

[NyanjuiA]

hello all,
This is what worked for me as at Thur. 12th Aug. 2021
if (snapshot.hasData) { final messages = snapshot.data.docs; List<Text> messageWidgets = []; for (var message in messages) { final messageText = message['text']; final messageSender = message['sender']; final messageWidget = Text('$messageText from $messageSender'); messageWidgets.add(messageWidget); } return Column( children: messageWidgets, ); } else { return Text('No Data Found'); }
Nice time and God Bless.

Kind regards,

Nyanjui A.

[fobf]

 final messageText = message['text'];
final messageSender = message['sender'];

this is what helped me

[syed-m-osama]

message.data() gets you the object, meanwhile message.get() gets you the object field.
final messageSender = message.get('sender');
final messageText = message.get('text');
this code bit works perfectly.

[FireWarrior22]

https://stackoverflow.com/questions/64186306/closure-call-with-mismatched-arguments-function-in-flutter

This worked for me.

  final messageText = message.data()['text'];
  final messageSender = message.data()['sender'];

Thanks. It worked

[hvb24]

i am getting Bad state: field does not exist within the DocumentSnapShotPlatform error message.
Can someone help me?

[rorosuperman]

StreamBuilder(
stream: _firestore.collection('messages').snapshots(),
builder: (BuildContext context , AsyncSnapshot snapshot) {
if(snapshot.hasData){
final messages = snapshot.data?.docs;
List messageWidgets = [];
for (var message in messages!) {
final messageText = message.data()['text'];
final messageSender = message.data()['sender'];
final messageWidget = Text('$message from $messageSender');
messageWidgets.add(messageWidget);
}
return Column(
children: messageWidgets,
);
}
},
),

Iam getting and error which says

The body might complete normally, causing 'null' to be returned, but the return type, 'Widget', is a potentially non-nullable type.

[rizogiyoev]

StreamBuilder( stream: _firestore.collection('messages').snapshots(), builder: (BuildContext context , AsyncSnapshot snapshot) { if(snapshot.hasData){ final messages = snapshot.data?.docs; List messageWidgets = []; for (var message in messages!) { final messageText = message.data()['text']; final messageSender = message.data()['sender']; final messageWidget = Text('$message from $messageSender'); messageWidgets.add(messageWidget); } return Column( children: messageWidgets, ); } }, ),

Iam getting and error which says

The body might complete normally, causing 'null' to be returned, but the return type, 'Widget', is a potentially non-nullable type.

Hey buddy!

I have the answer. You can use the below code, it worked for me.

StreamBuilder(
stream: _firestore.collection('messages').snapshots(),
builder: (context, snapshot) {
if (snapshot.hasData) {
final messages = snapshot.data!.docs;
List messageWidgets = [];
for (var message in messages) {
final messageText = message['text'];
final messageSender = message['sender'];
final messageWidget =
Text('$messageText from $messageSender');
messageWidgets.add(messageWidget);
}
return Column(
children: messageWidgets,
);
} else {
return const Text('No Data Found');
}
},
),