Validator class

The generic validator class that can be used for various validation purposes

Subclass it accordingly to build your own kind of validation(s). Refer to either ValidatorNumber or ValidatorString for more details.

The common use case is for TextFormField where you can add any of the validators in TextFormField.validator e.g.

TextFormField(
 decoration: InputDecoration(labelText: 'Test Less Than 5 and Positive'),
 keyboardType: TextInputType.number,
 validator: (v) => ValidatorNumber(v).lt(5).positive().build(),
);

Implementers

• ValidatorNumber
• ValidatorString

Constructors

Validator(dynamic value)

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

value ↔ dynamic

getter/setter pair

Methods

build() → String?

length({int min = 0, int max = int64Max, String errMsg(String val, int min, int max)?}) → Validator

Checks the length of the value makes sure it's between min and max range

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

optional() → Validator

toString() → String

A string representation of this object.

inherited

unless(ValidationUnless checker) → Validator

validate(ValidationRule rule) → Validator

Operators

operator ==(Object other) → bool

The equality operator.

inherited