title: Cloud Functions and Firestore does not go up the root in Firebase
body: <pre><code>// The Cloud Functions for Firebase SDK to create Cloud Functions and 
  setup triggers.
  const functions = require('firebase-functions');
  
  // The Firebase Admin SDK to access the Firebase Realtime Database. 
  const admin = require('firebase-admin');
  admin.initializeApp(functions.config().firebase);
  
  exports.giveCard = functions.firestore
  .document('Profiles/{profileId}/cards/{cardsId}/_given/{_givenID}')
  .onWrite((event) =&gt; {
  
      // Get the field values of what I am working with
      const oldGiven = event.data.previous.data()['given'];
      const newGiven = event.data.data()['given'];
  
      // Get the cardID to make sure that is there
      const cardID = event.params.cardsId;
  
      // An array to go through
      const give_profiles = event.data.data()['given_profiles'];
  
      // error cardDatatwo is returned as undefined
      const cardDatatwo = newGiven.parent;
  
      // error cardDatathree is returned as undefined
      const cardDatathree = event.data.ref.root
  
      // // error cardDatafour cannot read propoerty of undefined
      // const cardDatafour = cardDatathree.child('Profiles/{profileId}/cards/{cardsId}')
  
      // error cardDatafive 'The value of cardfive is DocumentReference...
      const cardDatafive = event.data.ref.firestore.doc('Profiles/{profileId}/cards/{cardsId}');
  
      // Check that the values have changed
      if (newGiven == oldGiven) return;
  
      if (newGiven !== undefined) {
  
          console.log('The old value of given is', oldGiven);
          console.log('The new value of given is', newGiven);
          console.log('The value of the card is', cardID);
          console.log('The value of the cardtwo is', cardDatatwo);
          console.log('The value of the cardthree is', cardDatathree);
          // console.log('The value of the cardfour is', cardDatafour);
          console.log('The value of the cardfive is', cardDatafive);
  
          for (var profile of give_profiles) {
              console.log(profile);
          };
          return;
      }
      return console.log("No given value");
  });
  </code></pre>
  
  <p>I am having great difficulty in getting the root for Firestore working with Cloud Functions. It works differently of course.</p>
  
  <p>I am try to get a value up the path towards the root after an onUpdate has been fired further down.</p>
  
  <p>.parent does not work
  functions.database.ref of course does not work as that's the realtime database
  and cannot use
  firebase.firestore() is also not working in node
  and event.data.ref.firestore.doc comes back as undefined.</p>
  
  <p>I am sure have gone through every option.</p>
  
  <p>Hope you can help.</p>
  
  <p>Wo</p>