MaxAgeValidator class

A validator that checks if the age calculated from the value date is less than or equal to maxAge.

The MaxAgeValidator can be used with FieldControllers holding values of type DateTime. It ensures that the calculated age does not exceed maxAge.

If the value is null, it is treated as valid by default.

Properties

• maxAge: The maximum allowed age calculated from the value date.
• message: An optional custom error message to display when invalid.

Example

FieldController<DateTime> field = FieldController(
  key: 'date',
  initialValue: DateTime(2025, 7, 12)
  validators: [MaxAgeValidator(18)],
);

// If field.value = DateTime(2000, 7, 12), validation fails.
// If field.value = DateTime(2010, 7, 12), validation passes.

See also

• FormyValidator, the base class for custom validators.
• ValidationResult, which describes the outcome of validation.
• FieldController, which holds the field value to be validated.

Inheritance

• Object
• FormyValidator<DateTime>
• MaxAgeValidator

Constructors

MaxAgeValidator(int maxAge, {String? message})

Properties

hashCode → int

The hash code for this object.

no setter, inherited

maxAge → int

The maximum allowed age calculated from the value date.

final

message → String?

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call(FieldController<DateTime> controller) → ValidationResult

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onValidate(FieldController<DateTime> controller) → ValidationResult

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited