requiredTrue static method

FormFieldValidator requiredTrue({
  1. String errorText = "This field must be set to true",
})

FormFieldValidator that requires the field's value be true. Commonly used for required checkboxes.

Implementation

static FormFieldValidator requiredTrue({
  String errorText = "This field must be set to true",
}) {
  return (valueCandidate) {
    if (valueCandidate != true) {
      return errorText;
    }
    return null;
  };
}