MustMatchValidator<T> class

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

The MustMatchValidator can be used with FieldControllers holding values of type T. It ensures that the value is equal to the value of otherField.

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: 'string',
 fields: [
   FieldConfig<string>(key: 'string1'),
   FieldConfig<string>(key: 'string2', validators: [MustMatchValidator(otherField: 'string1')]),
 ],
);

// If 'string1' value = 'abc' and 'string2' value = '123', validation fails.
// If 'string1' value = 'abc' and 'string2' value = 'abc, 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.