OptionalNullable<T, E> class

Wraps a validator for nullable types - skips validation when null.

final validator = OptionalNullable<int, String>(
  validator: ageRule,
);

validator.validate(null); // Valid(null)
validator.validate(25);   // Runs ageRule validation

Inheritance

• Object
• Formix<T?, E>
• OptionalNullable

Available extensions

• FormixExtensions

Constructors

OptionalNullable({required Formix<T, E> validator})

Creates an OptionalNullable validator.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

validator → Formix<T, E>

The validator to run if value is not null.

final

Methods

andThen(Formix<T, E> next) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Chains this validator with next, running next only if this passes.

cached() → CachedFormix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Wraps this validator with single-value caching.

lazy() → LazyFormix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Creates a lazy validator that defers instantiation until first use.

lruCached({int maxSize = 10}) → LruCachedFormix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Wraps this validator with LRU (Least Recently Used) caching.

mapError<E2>(E2 mapper(E error)) → Formix<T, E2>

Available on Formix<T, E>, provided by the FormixExtensions extension

Maps errors from type E to type E2.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

optional({bool isEmpty(T value)?}) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Makes this validator optional - skips validation when empty.

recover(T onError(List<E> errors)) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Recovers from validation errors with a default value.

tap({void onValid(T value)?, void onInvalid(List<E> errors)?}) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Applies side effects without affecting validation.

toString() → String

A string representation of this object.

inherited

validate(T? value) → ValidationResult<T?, E>

Validates value and returns a ValidationResult.

override

when(bool condition(T value)) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Conditionally applies this validator based on condition.

whenNot(bool condition(T value)) → Formix<T, E>

Available on Formix<T, E>, provided by the FormixExtensions extension

Conditionally skips this validator based on condition.

withMessageFormatter(ErrorMessageFormatter<E> formatter) → Formix<T, String>

Available on Formix<T, E>, provided by the FormixExtensions extension

Maps errors to user-facing messages using formatter.

Operators

operator ==(Object other) → bool

The equality operator.

inherited