FormCraftRequiredFieldValidator class final

A validator implementation for ensuring a field is not empty.

The validate method checks if the input is empty and returns an error message if true. Returns null if the input is not empty.

Implemented types

• FormCraftValidator

Constructors

FormCraftRequiredFieldValidator([String message = 'Required field'])

Constructs a FormCraftRequiredFieldValidator with the specified error message.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

message → String

The error message to be displayed when the validation fails.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

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 input) → String?

Validates the given input and returns an error message if validation fails. Returns null if the input is valid.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited