NoNumbersValidator class

A validator that checks if the value doesn't contain any number.

The NoNumbersValidator can be used with FieldControllers holding values of type String. It ensures that the value is doesn't contain any number.

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

Properties

• message: An optional custom error message to display when invalid.

Example

FieldController<String> field = FieldController(
  key: 'string',
  validators:[NoNumbersValidator()],
);

// If field.value = '123', validation fails.
// If field.value = 'h3!!0 w0r!d', validation fails.
// If field.value = 'hello world 2', 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.