Question 279460 in Flutter Question posted in
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Flutter – How to assign 'UserData' to 'UserData?'

I’m getting weird error,

The argument type 'UserData' can`t be assigned to the parameter type 'UserData?'

I think assigning ‘UserData?’ to ‘UserData’ is unsafe but, its obvious that I have definitely defined value. How can I add undefinition to make my user data to be accepted by the dart?

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2

Answers


  1. 0

    Use the null assertion operator ! when you’re sure that the value is not null:

    UserData userData = userDataOrNull!;
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  2. 0

    Just pass null assertion operator ! with object:

    void myFunction(UserData userData) {
  // use object here
}


myFunction(userData!); // Using ! to assert it's non-null

    Make sure to check the object is not null while adding null assertion operator.

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