Getting all documents from one collection in Firestore

Question

Hi I'm starting with javascript and react-native and I'm trying to figure out this problem for hours now. Can someone explain me how to get all the documents from firestore collection ?

I have been trying this:

async getMarkers() {
  const events = await firebase.firestore().collection('events').get()
    .then(querySnapshot => {
      querySnapshot.docs.map(doc => {
        console.log('LOG 1', doc.data());
        return doc.data();
      });
    });
  console.log('LOG 2', events);
  return events;
}

Log 1 prints all the objects(one by one) but log 2 is undefined, why ?

Answer 1

The example in the other answer is unnecessarily complex. This would be more straightforward, if all you want to do is return the raw data objects for each document in a query or collection:

async getMarker() {
    const snapshot = await firebase.firestore().collection('events').get()
    return snapshot.docs.map(doc => doc.data());
}

Answer 2

if you want include Id

async getMarkers() {
  const events = await firebase.firestore().collection('events')
  events.get().then((querySnapshot) => {
      const tempDoc = querySnapshot.docs.map((doc) => {
        return { id: doc.id, ...doc.data() }
      })
      console.log(tempDoc)
    })
}

Same way with array

async getMarkers() {
  const events = await firebase.firestore().collection('events')
  events.get().then((querySnapshot) => {
      const tempDoc = []
      querySnapshot.forEach((doc) => {
         tempDoc.push({ id: doc.id, ...doc.data() })
      })
      console.log(tempDoc)
   })
 }