Breaking News: Grepper is joining You.com. Read the official announcement!

Flutter Update multiple Documents

Edgar Nyambo answered on January 25, 2023 Popularity 1/10 Helpfulness 1/10

answer Flutter Update multiple Documents

Flutter Update multiple Documents

Comment

Future update(List<int> cartNumbers) async {
  WriteBatch batch = FirebaseFirestore.instance.batch();

  // 1. Get all items
  // 2. Iterate through each item
  // 3. Parse each document ID
  // 4. Check if cart_numers contains item
  // 5. Change quantity

  FirebaseFirestore.instance.collection("items").get().then((querySnapshot) {
    querySnapshot.docs.forEach((document) {
      try {

        // Only if DocumentID has only numbers
        if (cartNumbers.contains(int.parse(document.id))) {
          batch.update(document.reference,
              {"quantity": document.data()["quantity"] - 1});
        }
      } on FormatException catch (error) {

        // If a document ID is unparsable. Example "lRt931gu83iukSSLwyei" is unparsable.
        print("The document ${error.source} could not be parsed.");
        return null;
      }
    });
    return batch.commit();
  });
}

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: documents flutter whatever

Link to this answer
Share Copy Link

Contributed on Jan 25 2023

Edgar Nyambo

0 Answers Avg Quality 2/10

Flutter Update multiple Documents

Contents

More Related Answers

Flutter Update multiple Documents

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.