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

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;
}

CodePudding user response：

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.

CodePudding user response：

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;
}

CodePudding user response：

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
}