RequiredIf<T> class
A validation rule that checks if a value is required conditionally based on either a condition or the equality of another field's value.
This rule validates that the input value is required if a specified condition is met or if the value of another field is equal to a specified value.
- Inheritance
-
- Object
- ValidationRule<
T> - RequiredIf
Constructors
- RequiredIf(String? otherFieldName, {required dynamic equalTo, String? message})
- Creates a new instance of the RequiredIf validation rule based on the equality of another field's value.
- RequiredIf.condition(bool condition()?, {String? message})
- Creates a new instance of the RequiredIf validation rule based on a condition.
Properties
- condition → bool Function()?
-
The condition function that determines if the value is required.
final
- equalTo → dynamic
-
The value to compare for equality against the other field's value.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- l10n → ValidatorLocalizations
-
The ValidatorLocalizations instance used for localization of validation messages.
It's obtained through a service locator (
sl
) for convenience.no setterinherited - otherFieldName → String?
-
The name of the other field to compare equality against.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
message(
String fieldName) → String -
Retrieves the validation message to be displayed.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
validate(
T value, Map< String, FormFieldState> fields) → bool -
Validates the given
value
against the validation rule.override -
validatorMessage(
String fieldName) → String -
Retrieves the validator message for the field.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited