RequiredRule<T> class

A Rule subclass validating if the input is notEmpty. If the Value is null, this rule fails. If the value if of type String and if the String is empty, this rule fails. If the value if of type Iterable or Map and if the value is empty, this rule fails.

Inheritance

• Object
• Rule<T>
• RequiredRule

Constructors

RequiredRule({String? validationMessage})

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

transformMessage ↔ MessageTransformer?

A function used for transforming the message that comes back from the rules.

getter/setter pair, inherited

validationMessage → String?

A custom validation message to be used with the rule.

final, inherited

Methods

getRuleSpecificParams() → Map<String, String>

Returns a Map of values that are specific to the child Rule.

inherited

isEmptyIterable(dynamic value) → bool

isEmptyMap(dynamic value) → bool

isEmptyString(dynamic value) → bool

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onValidate(String entityName, T? value) → String?

Returns the validation message by the child class extending Rule.

override

toString() → String

A string representation of this object.

inherited

validate(String entityName, T? value) → String?

Returns validation message if validation fails.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited