delete a collection in firebase

Justin Michael answered on December 19, 2020 Popularity 9/10 Helpfulness 2/10

answer delete a collection in firebase

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delete a collection in firebase

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/**
 * Delete a collection, in batches of batchSize. Note that this does
 * not recursively delete subcollections of documents in the collection
 */
import { collection, query, orderBy, limit, getDocs, writeBatch } from "firebase/firestore"; 

function deleteCollection(db, collectionRef, batchSize) {
  const q = query(collectionRef, orderBy('__name__'), limit(batchSize));

  return new Promise((resolve) => {
      deleteQueryBatch(db, q, batchSize, resolve);
  });
}

async function deleteQueryBatch(db, query, batchSize, resolve) {
  const snapshot = await getDocs(query);

  // When there are no documents left, we are done
  let numDeleted = 0;
  if (snapshot.size > 0) {
    // Delete documents in a batch
    const batch = writeBatch(db);
    snapshot.docs.forEach((doc) => {
      batch.delete(doc.ref);
    });

    await batch.commit();
    numDeleted = snapshot.size;
  }

  if (numDeleted < batchSize) {
    resolve();
    return;
  }

  // Recurse on the next process tick, to avoid
  // exploding the stack.
  setTimeout(() => {
      deleteQueryBatch(db, query, batchSize, resolve);
  }, 0);
}

Popularity 9/10 Helpfulness 2/10 Language whatever

Source: modularfirebase.web.app

Tags: firebase whatever

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Contributed on Jun 20 2022

Justin Michael

0 Answers Avg Quality 2/10

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how to delete firebase collection

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-1

this.db
  .collection('cart')
  .get()
  .toPromise()
  .then((querySnapshot) => {
  querySnapshot.forEach((doc) => {
    doc.ref.delete();
  });
});

Popularity 10/10 Helpfulness 4/10 Language typescript

Source: Grepper

Tags: firebase firebas

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Contributed on Dec 19 2020

Cherry berry

0 Answers Avg Quality 2/10

delete a collection in firebase

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