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 firestor

Answer 1

Try following LOCs

    let query = firestore.collection('events');
    let response = [];
    await query.get().then(querySnapshot => {
          let docs = querySnapshot.docs;
          for (let doc of docs) {
              const selectedEvent = {
                     id: doc.id,
                     item: doc.data().event
                  };
             response.push(selectedEvent);
          }
   return response;

Answer 2

Here's a simple version of the top answer, but going into an object with the document ids:

async getMarker() {
    const snapshot = await firebase.firestore().collection('events').get()
    return snapshot.docs.reduce(function (acc, doc, i) {
              acc[doc.id] = doc.data();
              return acc;
            }, {});
}

Answer 3

if you need to include the key of the document in the response, another alternative is:

async getMarker() {
    const snapshot = await firebase.firestore().collection('events').get()
    const documents = [];
    snapshot.forEach(doc => {
       documents[doc.id] = doc.data();
    });
    return documents;
}

Answer 4

I made it work this way:

async getMarkers() {
  const markers = [];
  await firebase.firestore().collection('events').get()
    .then(querySnapshot => {
      querySnapshot.docs.forEach(doc => {
      markers.push(doc.data());
    });
  });
  return markers;
}

Answer 5

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)
   })
 }

Answer 6

You could get the whole collection as an object, rather than array like this:

async getMarker() {
    const snapshot = await firebase.firestore().collection('events').get()
    const collection = {};
    snapshot.forEach(doc => {
        collection[doc.id] = doc.data();
    });
    return collection;
}

That would give you a better representation of what's in firestore. Nothing wrong with an array, just another option.