SelectFieldBloc<Value, ExtraData> constructor
SelectFieldBloc<Value, ExtraData> ({
- String? name,
- Value? initialValue,
- List<
Validator< ? validators,Value?> > - List<
AsyncValidator< ? asyncValidators,Value?> > - Duration asyncValidatorDebounceTime = const Duration(milliseconds: 500),
- Suggestions<
Value> ? suggestions, - List<
Value> items = const [], - dynamic toJson(
- Value? value
- ExtraData? extraData,
SelectFieldBloc<Value, ExtraData>
Properties:
name
: It is the string that identifies the fieldBloc, it is available in FieldBlocState.name.initialValue
: The initial value of the field, by default isnull
.validators
: List of Validators. Each time thevalue
will change, if the FormBloc that use this SelectFieldBloc has set in thesuper
constructorautoValidate = true
, thevalue
is passed to eachvalidator
, and if anyvalidator
returns aString error
, it will be added to SelectFieldBlocState.error. Else ifautoValidate = false
, the value will be checked only when you call validate which is called automatically when call FormBloc.submit.asyncValidators
: List of AsyncValidators. it is the same asvalidators
but asynchronous. Very useful for server validation.asyncValidatorDebounceTime
: The debounce time when anyasyncValidator
must be called, by default is 500 milliseconds. Very useful for reduce the number of invocations of each `asyncValidator. For example, used for prevent limit in API calls.suggestions
: This need be a Suggestions and will be added to SelectFieldBlocState.suggestions. It is used to suggest values, usually from an API, and any of those suggestions can be used to update the value using updateValue.items
: The list of items that can be selected to update the value.toJson
: Transform value in a JSON value. By default returns value. This method is called when you use FormBlocState.toJsonextraData
: It is an object that you can use to add extra data, it will be available in the state FieldBlocState.extraData.
Implementation
SelectFieldBloc({
String? name,
Value? initialValue,
List<Validator<Value?>>? validators,
List<AsyncValidator<Value?>>? asyncValidators,
Duration asyncValidatorDebounceTime = const Duration(milliseconds: 500),
Suggestions<Value>? suggestions,
List<Value> items = const [],
dynamic Function(Value? value)? toJson,
ExtraData? extraData,
}) : super(
validators: validators,
asyncValidators: asyncValidators,
asyncValidatorDebounceTime: asyncValidatorDebounceTime,
initialState: SelectFieldBlocState(
isValueChanged: false,
initialValue: initialValue,
updatedValue: initialValue,
value: initialValue,
error: FieldBlocUtils.getInitialStateError(
validators: validators,
value: initialValue,
),
isDirty: false,
suggestions: suggestions,
isValidated: FieldBlocUtils.getInitialIsValidated(
FieldBlocUtils.getInitialStateIsValidating(
asyncValidators: asyncValidators,
validators: validators,
value: initialValue,
),
),
isValidating: FieldBlocUtils.getInitialStateIsValidating(
asyncValidators: asyncValidators,
validators: validators,
value: initialValue,
),
name: FieldBlocUtils.generateName(name),
items: SingleFieldBloc._itemsWithoutDuplicates(items),
toJson: toJson,
extraData: extraData,
),
);