RequiredFieldValidator class
A validator to ensure the field is filled with any non-null and non-empty value.
Constructors
- RequiredFieldValidator(String errorMessage)
- Constructor receives the error message to be returned if the field is not filled
Properties
- errorMessage → String
-
The error message returned if the field is not filled
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
result(
{required bool isValid, required String? errorMessage}) → Future< ValidatorResult> -
Returns a validation result as a Future to avoid verbosity
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
validate(
dynamic value) → Future< ValidatorResult> -
Called by the FormX to validate each field.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited