NullableRule class

A validation rule that allows null values. It effectively removes any other validation rules if the value is null. This rule should be listed first if you want to allow nulls.

Inheritance

• Object
• ValidationRule
• NullableRule

Constructors

NullableRule()

Properties

contextValues → Map<String, dynamic>?

Provide the values from the data to the rule, null if none

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

name → String

The name of the validation rule. This should be a unique identifier for the rule.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

message(dynamic value, [List<String>? options]) → String

The message that will be displayed if the validation fails. This message should be user-friendly and explain why the validation failed.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

validate(dynamic value, [List<String>? options]) → bool

Validates the given value against the rule.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited