I want to use update method in FirebaseFirestore instance but it is not working. I have intialized id as String i.e String Id in the stateful widget

This is ViewData Page which has a button Widget

class ViewData extends StatefulWidget {
  const ViewData({Key? key, required this.document, required this.id})
      : super(key: key);

  final Map<String, dynamic> document;
  final String id;

Widget button() {
    return InkWell(
      onTap: () {
        FirebaseFirestore.instance.collection("mytask").doc(widget.id).update({
          "title": titleController.text,
          "description": descriptionController.text,
          "type": type,
          "category": category,
          "format": format,
        });
        Navigator.pop(context);
      },
      child: Container(
        height: 56,
        width: MediaQuery.of(context).size.width,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(15),
        ),
        child: const Center(
          child: Text(
            "Update",
            style: TextStyle(
              color: Colors.white,
              fontSize: 18,
              fontWeight: FontWeight.w600,
            ),
          ),
        ),
      ),
    );
  }

There is another page named Homepage where Snapshot has been written.

 return ListView.builder(
                  itemCount: snapshot.data.docs.length,
                  itemBuilder: (context, index) {
                    Map<String, dynamic> document = snapshot.data.docs[index]
                        .data() as Map<String, dynamic>;
                    return InkWell(
                      onTap: () {
                        Navigator.push(
                            context,
                            MaterialPageRoute(
                                builder: (builder) =>
                                    ViewData(
                                      document: document,
                                      id : snapshot.data.docs[index].id,
                                    ),
                            ),
                        );
                      },

Help me find the correct document id.

CodePudding user response：

use set() method if you want change many data in doc, set will create new document if not exists or overwrite new data in document

        FirebaseFirestore.instance.collection("mytask").doc(widget.id).set({
          "title": titleController.text,
          "description": descriptionController.text,
          "type": type,
          "category": category,
          "format": format,
        });

See more how to add data to cloud firestore

CodePudding user response：

You need to add "SetOptions(merge: true)" as below.

  Future<void> setData({
    required String path,
    required Map<String, dynamic> data,
  }) async {
    final reference = FirebaseFirestore.instance.doc(path);
    return reference
        .set(data, SetOptions(merge: true))
        .timeout(const Duration(seconds: timeOutSecond))
        .catchError((onError) {
      if (onError is SocketException) {
        throw Failure(
          exception: one rror,
          message: "No internet connection",
          code: one rror.message,
        );
      } else if (onError is TimeoutException) {
        throw Failure(
          exception: one rror,
          message: "Timeout...",
          code: one rror.message,
        );
      } else {
        throw Failure(
          exception: one rror,
          message: "An undefined Error happened.",
        );
      }
    });
  }