Using async await in Firestore to retrieve a post title

My goal is to retrieve a post title from Firestore, but I'm having trouble figuring out how to do so using async await.

async getVideo(id) {
  var self = this;
  const ref = this.$fire.firestore
    .collection("posts")
    .where("ytid", "==", id)
    .orderBy("createdAt", "desc");
  try {
    let post = await ref.get();
    console.log(post.data());
  } catch (e) {
    console.log(e);
  }
}

When I attempted to log post.data(), it returned an error stating that post.data() is not a function. Any assistance on this matter would be greatly appreciated.

Answer №1

Upon calling ref.get(), a QuerySnapshot object is returned, containing zero or more DocumentSnapshot objects with the query results data. Note that QuerySnapshot does not include a method named data(). To access the DocumentSnapshots, you need to iterate through them using the provided API:

const qsnapshot = await ref.get();
qsnapshot.forEach(doc => {
    const data = doc.data();
    console.log(data);
})

Answer №2

When retrieving multiple documents, the `post` variable will contain a snapshot of documents that do not have a `data()` method.

You will need to loop through the snapshot in order to access each individual document.

Take a look at this guide for a quick reference or this link for a detailed explanation of the `QuerySnapshot` type.

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