How to store doc id when creating it using flutter and firestore

user_14163640 0
Viewed 1174

I'm creating a Todo App and I need to access the ids of my documents stored in firestore in order to delete them. But I can't figure out how to save it when I'm creating it. Here's the part in my Add screen where I create a new document.

 _firestore.collection('todos').add({
                    'title' : title,
                    'type' : type,
                    'date' : dayDate,
                    'time' : _dayTime,
                    'category' : category,
                    'author' : loggedInUser.uid,
                    //'id' : doc.id
                  
                  });

I don't know how to acess it. And also I display my tasks into cards and when i long press them I want them to delete from firestore but I can't bc I don't have their idea. Here's my empty function:

void deleteTask(){
_firestore.collection("todos").doc().delete();
}

If you have any ideas please tell me. Thanks guys!

google-cloud-firestore dart flutter
3 Answers

You can get the doc id before like so CollectionRef.pots.doc().id you can then add it. This way you will have the docId also inside the doc which you can access when you have the doc data..

 static createPot(String name, String password) async{
    try{
      PotModel newPot = PotModel(
        name: name,
        potId: FirebaseFirestore.instance.collection('pots').doc().id, // will generate a random doc id, which will be used to create the next document
        password: password,
        ownerId: ViewModelUser.user.value.mobile,
        createdAt: Timestamp.now(),
        isActive: true,
        potActions: [],
        users: [ViewModelUser.user.value.mobile]
      );
      /// creating a new pot
      DocumentReference documentReference = await FirebaseFirestore.instance.collection('pots').add(newPot.toJson());

      return newPot;
    }catch(e){
      print(e.toString());
      return null;
    }
  }
user_137428100 
CollectionReference ref =
    await FirebaseFirestore.instance.collection('todos');

String docId=ref.doc().id;

await ref.doc(docId).set({
  'title' : title,
  'type' : type,
  'date' : dayDate,
  'time' : _dayTime,
  'category' : category,
  'author' : loggedInUser.uid,
  'id' : docId
});
user_67112840

Sorry, I'm a bit late but If anyone else is stuck here is how you can store doc id when creating it

CollectionReference ref =
        FirebaseFirestore.instance.collection('todos');

    await ref.doc(ref.doc().id).set({
                    'title' : title,
                    'type' : type,
                    'date' : dayDate,
                    'time' : _dayTime,
                    'category' : category,
                    'author' : loggedInUser.uid,
                    'id' : ref.doc().id
                  
                  }).then((value) {
            // Do something
    }).onError((error, stackTrace) {
      print(stackTrace);
    });

To delete the specific collection

void deleteTask(){
  FirebaseFirestore.instance.collection('todos').doc(docId).delete();
}
user_109616490
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