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

Best way to count document in Flutter OPT 3

Add Answer

Edgar Nyambo answered on February 5, 2023 Popularity 1/10 Helpfulness 1/10

answer Best way to count document in Flutter OPT 3

related Best way to count document in Flutter

related Best way to count document in Flutter OPT2

Best way to count document in Flutter OPT 3

Comment

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();

exports.aggregateComments = functions.firestore
    .document('posts/{postId}/comments/{commentId}')
    .onWrite(event => {

    const commentId = event.params.commentId; 
    const postId = event.params.postId;
    
    // ref to the parent document
    const docRef = admin.firestore().collection('posts').doc(postId)
    
    // get all comments and aggregate
    return docRef.collection('comments').orderBy('createdAt', 'desc')
         .get()
         .then(querySnapshot => {

            // get the total comment count
            const commentCount = querySnapshot.size

            const recentComments = []

            // add data from the 5 most recent comments to the array
            querySnapshot.forEach(doc => {
                recentComments.push( doc.data() )
            });

            recentComments.splice(5)

            // record last comment timestamp
            const lastActivity = recentComments[0].createdAt

            // data to update on the document
            const data = { commentCount, recentComments, lastActivity }
            
            // run update
            return docRef.update(data)
         })
         .catch(err => console.log(err) )
});

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: fireship.io

Tags: count document flutter javascript

Link to this answer
Share Copy Link

Contributed on Feb 05 2023

Edgar Nyambo

0 Answers Avg Quality 2/10

Closely Related Answers

Best way to count document in Flutter

Comment

export const onCreateCounter = () => async (
  change,
  context
) => {
  const collectionPath = change.ref.parent.path;
  const statsDoc = db.doc("counters/" + collectionPath);
  const countDoc = {};
  countDoc["count"] = admin.firestore.FieldValue.increment(1);
  await statsDoc.set(countDoc, { merge: true });
};

export const onDeleteCounter = () => async (
  change,
  context
) => {
  const collectionPath = change.ref.parent.path;
  const statsDoc = db.doc("counters/" + collectionPath);
  const countDoc = {};
  countDoc["count"] = admin.firestore.FieldValue.increment(-1);
  await statsDoc.set(countDoc, { merge: true });
};

export interface CounterPath {
  watch: string;
  name: string;
}

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: whatever count document flutter

Link to this answer
Share Copy Link

Contributed on Feb 05 2023

Edgar Nyambo

0 Answers Avg Quality 2/10

Best way to count document in Flutter OPT2

Comment

export const documentWriteListener = functions.firestore
  .document('collection/{documentUid}')
  .onWrite((change, context) => {

    if (!change.before.exists) {
      // New document Created : add one to count
      db.doc(docRef).update({ numberOfDocs: FieldValue.increment(1) });
    } else if (change.before.exists && change.after.exists) {
      // Updating existing document : Do nothing
    } else if (!change.after.exists) {
      // Deleting document : subtract one from count
      db.doc(docRef).update({ numberOfDocs: FieldValue.increment(-1) });
    }

    return;
  });

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: count document flutter whatever

Link to this answer
Share Copy Link

Contributed on Feb 05 2023

Edgar Nyambo

0 Answers Avg Quality 2/10

Best way to count document in Flutter OPT 3

Contents

More Related Answers

Best way to count document in Flutter OPT 3

Closely Related Answers

Best way to count document in Flutter

Best way to count document in Flutter OPT2

Grepper

Documentation

Social

Legal

Contact

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