Property can't be unconditionally accessed because the receiver can be null

user_4200716 0
Viewed 107

I am trying to address the null safety on the following function. Nesting if statements doesn't seem to work.

bool doesTourExceedsVenueCapacity(
  ToursRecord? tourRecord,
  int? venueCapacity,
) {
 
  return tourRecord.passengers > venueCapacity ? true : false;
}
dart-null-safety dart flutter
3 Answers

Since both of your values are nullable you have to adjust your code to do the conditional check. Add some guard-like checks before:

bool doesTourExceedsVenueCapacity(
  ToursRecord? tourRecord,
  int? venueCapacity,
) {
  final passengers = tourRecord?.passengers;
  if (venueCapacity == null) return false //adjust return value
  if (passengers == null) return false // adjust return value
 
  return passengers > venueCapacity; // ? true : false unnecessary here
}
user_166403300

It does not work because the statement that you check tourRecord.passengers > venueCapacity contains two values that can be null. ToursRecord? tourRecord.passengers and int? venueCapacity. The question mark is important.

user_144344260

Either Remove null or add condition to handle nullable type in your condition.

Example (By removing nullable type)

bool doesTourExceedsVenueCapacity(
  ToursRecord tourRecord,
  int venueCapacity,
) {
 
  return tourRecord.passengers > venueCapacity ? true : false;
}
user_92122460
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