Alpha class

A validation rule that checks if a string contains only alphabetic characters.

This rule validates that the input string consists of alphabetic characters (letters) only.

Inheritance

• Object
• ValidationRule<String>
• Alpha

Constructors

Alpha({String? message})

Creates a new instance of the Alpha validation rule.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

l10n → ValidatorLocalizations

The ValidatorLocalizations instance used for localization of validation messages. It's obtained through a service locator (sl) for convenience.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

message(String fieldName) → String

Retrieves the validation message to be displayed.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

validate(String value, Map<String, FormFieldState> fields) → bool

Validates the given value against the validation rule.

override

validatorMessage(String fieldName) → String

Retrieves the validator message for the field.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited