in flutter with dart I have a problem , The receiver can't be null, so the null-aware operator '?.' is unnecessary

Question

**I have a problem with this code:** The receiver can't be null, so the null-aware operator '?.' is unnecessary. this is appear when I execution the above code

please help me if u know anything about this problem

    var activeVoteId = Provider.of<VoteState>(context).activeVote?.voteId ?? '';

score 1 · Answer 1 · answered Dec 17 '21 at 15:20

1

activeVote initialize with null-able and remove the late keyword. Otherwise, initialize when you declare the activeVote

DataType ? activeVote;

if you use follow the the given example

late DataType  activeVote = initValue;
//like
late String value = "";

answered Dec 17 '21 at 15:20

Jahidul Islam

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follow the link for late initialization https://stackoverflow.com/questions/69312956/flutter-late-keyword-with-declaration/69313493#69313493 – Jahidul Islam Dec 17 '21 at 15:26
I do not understand ??? Can you write my code correctly so that the error disappears? – suzan emad Dec 17 '21 at 18:33
Share your activevote provider code part – Jahidul Islam Dec 17 '21 at 19:45
Function alternateColor = getAlternate(start: 0); String activeVoteId = Provider.of(context).activeVote?.voteId ?? ''; – suzan emad Dec 18 '21 at 16:21
try with this `String activeVoteId = Provider.of(context)?.activeVote?.voteId ?? ''` – Jahidul Islam Dec 18 '21 at 16:25
`activeVote` code part from your provider – Jahidul Islam Dec 18 '21 at 16:26

in flutter with dart I have a problem , The receiver can't be null, so the null-aware operator '?.' is unnecessary

1 Answers1