firebase - How to access array index of Cloud Firestore using query in Flutter?

Question

I have field users in document and this field contains two element in array. I have to check specific two values are in this array.

First, I used array-contains method twice for this, but it occurred error.

How can I access index of array field in Cloud Firestore?

Below code is my approach and it is not working:

QuerySnapshot querySnapshot = await sl.get<FirebaseAPI>().getFirestore()
      .collection('messages')
      .where('users'[0],isEqualTo: 'user1ID')
      .where('users'[1],isEqualTo: 'user2ID')
      .getDocuments();

simple firestore structure

Answer 1

Waitting for answers