I am trying to delete elements from 2 different collections in firestore using a cloud function. I am doing:

const functions = require("firebase-functions");
const admin = require("firebase-admin");
const { GoogleAuth } = require("googleapis-common");
const { google } = require("googleapis");
const firebase_tools = require("firebase-tools");
const firestore = admin.initializeApp().firestore();
const Buffer =  require('buffer');
const PROJECT_ID = process.env.GOOGLE_CLOUD_PROJECT;
const PROJECT_NAME = `projects/${PROJECT_ID}`;

exports.removeFromShoppingList = functions.region('europe-west1').https.onCall(async(snap, context) => {
  const db = firestore;
  const batch = db.batch;
  const shoppingCartId = snap.shoppingCartId;
  const shoppingListId = snap.shoppingListId;
  const productId = snap.productId;

  try {
    
    if (!(context.auth && context.auth.token)) {
      throw new functions.https.HttpsError(
        'permission-denied',
        'Must be an administrative user to initiate delete.'
      );
    }
    const pathShoppingListDetailsCollection = db.collection('shoppingListDetails').doc(shoppingListId)
      .collection('products').doc(productId);

    batch.delete(pathShoppingListDetailsCollection);

    const pathShoppingListsCollection = db.collection('shoppingLists').doc(shoppingCartId)
      .collection('shoppingListCart').doc(shoppingListId).collection('products').doc(productId);

    batch.delete(pathShoppingListsCollection);
    await batch.commit();

  } catch(err){
    functionCalledToHandleError();
  }
})

And in the client in flutter I call the cloud function like this:

Future<void> removeProductsFromShoppingList({
required String shoppingCartId,
required String shoppingListId,
required String productId
}) async {
try {
  final data = {
    'shoppingCartId': shoppingCartId,
    'shoppingListId' : shoppingListId,
    'productId' : productId
  };

  var delete = functions.httpsCallable('removeFromShoppingList')
      .call(data);

} on FirebaseFunctionsException catch (err){
  print('estamos en el FirebaseFunctionsException ');
} catch (e) {
  throw CouldNotDeleteNoteException();
}

}

And I am getting an error when I do the batch.delete(pathShoppingListDetailsCollection) when I go check the logs in the google cloud console the only message that is helping is the textPayload that says textPayload: "There was an error deleting the documents" is there a way to see this logs more in detail. Because with only this information I don't know the reason why I cannot delete the documents.

Thank you in advance.

CodePudding user response：

As @Frank van Puffelen said with the log err I got some more information about the error and I could solve the problem, thank you so much.

In my case the error was that batch.delete was not a function and that was because I missed parentheses when declaring the const batch = db.batch()