javascript - Firebase: Transaction read and update multiple documents

Question

With this code I can read and update single document in the transaction.

// Update likes in post
var docRef = admin
  .firestore()
  .collection("posts")
  .doc(doc_id);

let post = await admin.firestore().runTransaction(t => t.get(docRef));
if (!post.exists) {
  console.log("post not exist")
}
postData = { ...post.data(), id: post.id };
let likes = postData.likes || 0;
var newLikes = likes + 1;
await post.ref.update({ likes: newLikes });

Question: But I need to read and update multiple documents and each one update depending on their content. For example I want to update number of likes in posts collection as in my code but also update number of total likes in my profile document.

Answer 1

Waitting for answers