Pass value from Statefulwidget to Providerclass Flutter - flutter

Question

i want to pass postid value from a statefulwidget to a function inside Providerclass, somebody please help
class CommentPage extends StatefulWidget {
final String postid;
final String postdescription;
CommentPage({
required this.postdescription,
Key? key,
required this.postid,
}) : super(key: key);
#override
State<CommentPage> createState() => _CommentPageState();
}
Providerclass
class CommentPageProvider extends ChangeNotifier {
static CommentPageProvider instance = CommentPageProvider();
List<HomeFeedDataModel> homeFeedDatacollection = [];
List<CommentsModelData> commentsDatacollection = [];
List<SingleUserPostModelData> singleuserdatacollection = [];
bool isLoadingdata = false;
bool isSingleUserdata = false;
bool isLikePressed = false;
bool isLoadCommentsPressed = false;
bool isLikeButtonPressed = false;
bool isCommentsDataloaded = false;
getCommentsData() async {
isCommentsDataloaded = true;
commentsData = await CommentService().getCommentsdata(post_id: );
notifyListeners();
}
so that i can fetch matching comments,

Answer 1

What's wrong with passing the post ID into the getCommentsData() as a parameter?
class CommentPageProvider extends ChangeNotifier {
static CommentPageProvider instance = CommentPageProvider();
List<HomeFeedDataModel> homeFeedDatacollection = [];
List<CommentsModelData> commentsDatacollection = [];
List<SingleUserPostModelData> singleuserdatacollection = [];
bool isLoadingdata = false;
bool isSingleUserdata = false;
bool isLikePressed = false;
bool isLoadCommentsPressed = false;
bool isLikeButtonPressed = false;
bool isCommentsDataloaded = false;
getCommentsData(String postId) async {
// I changed the name of this because there is no 'commentsData' field in your provider class
commentsDatacollection = await CommentService().getCommentsdata(post_id: postId);
isCommentsDataloaded = true;
notifyListeners();
}
By declaring your data collection as nullable (List<CommentsModelData> commentsDatacollection = [];), I think you could remove the boolean isCommentsDataloaded and simply check for a null value in your widget build method.
CommentPage
Here you just access the provider and pass through the post ID.
class CommentPage extends StatefulWidget {
final String postid;
final String postdescription;
CommentPage({
required this.postdescription,
Key? key,
required this.postid,
}) : super(key: key);
#override
State<CommentPage> createState() => _CommentPageState();
}
class _CommentPageState extends State<CommentPage> {
#override
Widget build(BuildContext context) {
final provider = Provider.of<CommentPageProvider>(context).getCommentsData(widget.postId);
}
}
Let me know if this helped!