BetweenValuesValidator class

A validator that checks if the value is between minValue and maxValue.

The BetweenValuesValidator can be used with FieldControllers holding values of types int or double. It ensures that the value is between minValue and maxValue.

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

Properties

• minValue: The minimum allowed for the value.
• maxValue: The maximum allowed for the value.
• message: An optional custom error message to display when invalid.

Example

FieldController<int> field = FieldController(
  key: 'number',
  validators:[BetweenValuesValidator(minValue:4, maxValue:6)],
);

// If field.value = 3, validation fails.
// If field.value = 7, validation fails.
// If field.value = 5, 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.