ContainsValidator<T> class

A validator that checks if the value contains contain.

The ContainsValidator can be used with FieldControllers holding values of types String, Iterable or Map. It ensures that the value contains contain.

If the value is null it is treated as valid by default.

Properties

• contain: The value that the field should contain.
• message: An optional custom error message to display when invalid.

Example

FieldController<int> field = FieldController(
  key: 'name',
  validators:[ContainsValidator('Hello')],
);

// If field.value = 'Bye World :( )', validation fails.
// If field.value = 'Hello World :) )', validation passes.

See also

• FormyValidator, the base class for custom validators.
• ValidationResult, which describes the outcome of validation.
• FieldController, which holds the field value to be validated.

Inheritance

• Object
• FormyValidator<T>
• ContainsValidator

Constructors

ContainsValidator(dynamic contain, {String? message})

Properties

contain → dynamic

The value that the field value should contain.

final

hashCode → int

The hash code for this object.

no setter, inherited

message → String?

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call(FieldController<T> controller) → ValidationResult

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onValidate(FieldController<T> controller) → ValidationResult

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited