RequiredRule class

A validation rule that checks if a value is present and not empty. This rule is used to ensure that a field is not left blank.

Inheritance

• Object
• ValidationRule
• RequiredRule

Constructors

RequiredRule()

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 is used to identify the rule in validation logic.

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 provides feedback to the user indicating that the field is required.

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 to check if it is not null and not empty.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited