BiggerThanValidator<T> class

A validator that checks if the value is greater than or equal to the value of otherField.

The BiggerThanValidator can be used with FieldControllers holding values of type num, String, List, Map, or Set. It ensures that the value is greater than or equal to the value of otherField.

For String, List, Map, and Set, the comparison is done based on length. For num, the comparison is done directly on the numeric value.

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

Properties

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

Example

GroupController group = GroupController(
 key: 'num',
 fields: [
   FieldConfig<int>(key: 'num1'),
   FieldConfig<int>(key: 'num2', validators: [BiggerThanValidator(otherField: 'num1')]),
 ],
);

// If 'num1' value = 10 and 'num2' value = 5, validation fails.
// If 'num1' value = 5 and 'num2' value = 10, validation passes.

See also

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