deleting_document_firestore.go

unc (m *FirestoreBinManager) BinDelete(ctx context.Context, binID string) error {
	_, err := m.client.Collection(m.binsCollection).Doc(binID).Delete(ctx)
	if err != nil {
		m.logger.Errorw("failed to delete bin doc by ref",
			"error", err,
		)
	}
	// Now, get all the requests and delete them in a batch request
	iter := m.client.Collection(m.reqsCollection).Where("Bin", "==", binID).Documents(ctx)
	numDeleted := 0
	batch := m.client.Batch()
	for {
		doc, err := iter.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return fmt.Errorf("Failed to iterate: %v", err)
		}
		batch.Delete(doc.Ref)
		numDeleted++
	}
	// If there are no documents to delete,
	// the process is over.
	if numDeleted == 0 {
		return nil
	}
	_, err = batch.Commit(ctx)
	return err
}