How to add data on nested array in Firestore with react-native

Question

I would like to ask if is it possible to add data in a nested array.The result i want is this

But i get this when i add a new rating with the code i use

async function getAll(){
    const userEmail= firebase.firestore().collection('users')
    const snapshot=await userEmail.where('email','==',index.email).get()
    if (snapshot.empty) {
      console.log('No matching documents.');
      return;
    }  
    
    snapshot.forEach(doc => {
      userEmail.doc(doc.id).set({userRatings2:firebase.firestore.FieldValue.arrayUnion({parking:[markerName]})},{merge:true})
      userEmail.doc(doc.id).set({userRatings2:firebase.firestore.FieldValue.arrayUnion({rating:[currentRating]})},{merge:true})

     
      
     console.log(userEmail.doc(doc.id));
    });
  }
  getAll()

Answer 1

I've managed to do it by using forEach function to an array of image path

  const [imageUri, setImageUri] = useState([]);
  const [uploading, setUploading] = useState(false);

  const UploadImage = () => {
    setUploading(true);
    imageUri.forEach(async (image, index) => {
      // setTransferred(0);

      const pathToFile = image;
      let filename = pathToFile.substring(pathToFile.lastIndexOf('-') + 1);
      const extension = filename.split('.').pop();
      const name = filename.split('.').slice(0, -1).join('.');
      filename = name + Date.now() + '.' + extension;

      const reference = storage().ref().child(`/userprofile/${filename}`);
      // path to existing file on filesystem

      // uploads file
      const task = reference.putFile(pathToFile);
      try {
        await task;

        const url = await reference.getDownloadURL();
        downloadableURI.push(url);
        if (index == imageUri.length - 1) {
          setUploading(false);
          Alert.alert(
            'Image uploaded!',
            'Your image has been uploaded to the Firebase Cloud Storage Successfully!',
          );
        }
      } catch (e) {
        console.log(e);
      }
    });
  };

whenever the function is called, then the array of images is uploaded to firebase storage,