Hi fellas Im new in Flutter/Dart Programming. Im trying to build an app that includes dynamic TextFormField. Validator does not returning text in the screen. Could you give me an explanation so i could build my app in the correct way.
import 'package:camework/global/styles.dart';
import 'package:camework/repos/surveyRepo/surveyRepo.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import '../../../../global/appLocatizations.dart';
class DefaultQuestion extends StatefulWidget {
const DefaultQuestion({Key? key}) : super(key: key);
@override
State<DefaultQuestion> createState() => _DefaultQuestionState();
}
class _DefaultQuestionState extends State<DefaultQuestion> {
TextEditingController surveyTextController = TextEditingController();
final _formKey = GlobalKey<FormState>();
@override
Widget build(BuildContext context) {
SurveyRepo surveyRepo = Provider.of<SurveyRepo>(context);
var questionType = surveyRepo.surveyQuestion!.questionType!.mask!;
return TextFormField(
decoration: ProjectStyles.textFieldDecoration(null, null, null),
keyboardType: keyboardType(questionType),
inputFormatters: [inputFormat(questionType)],
autofocus: true,
onChanged: (String? value) {
if (value != null && value != "") {
setState(() {
surveyTextController.text = value;
surveyRepo.textQuestionTrigger(value);
});
}
},
key: _formKey,
validator: (value) {
if (value != null) {
if (value.isEmpty) {
`THIS IS NOT WORKING`
return AppLocalizations.of(context)!.translate("thisFieldCannotBeEmpty");
}
}
},
controller: surveyTextController,
);
}
}
`
CodePudding user response:
you can check below package it's helpful for validator package
CodePudding user response:
You can use a validator using the validator property.
Like that
TextFormField(
validator: EmailValidator(errorText: 'enter a valid email address')
);
CodePudding user response:
_formKey
is used for the key of Form
Widget. Not for the TextFormField
.
see example from documentation : https://docs.flutter.dev/cookbook/forms/validation
return Form(
key: _formKey, // <= Use here
child: TextFormField(
// rest of property
//...
validator : (val) {
// your function for validation
}
)
)