flutter firestore only see posts of people you follow

You can use the ‘in’ operator to retrieve posts whose creator is included in the list of followed users.

final firestore = FirebaseFirestore.instance;

try {
  // Get the specified user document from Firestore
  final userSnapshot = await firestore
      .collection('userCollection')
      .doc('userId')
      .get();

  // Check if the user document exists
  if (userSnapshot.exists) {
    // Get the list of followedUsers from the user data
    final followedUsers = List<String>.from(userSnapshot.data()['followedUsers']);

    // Query Firestore for every Post document that was created by any followedUsers
    final posts = await firestore
        .collection('postsCollection')
        .where('creator', whereIn: followedUsers)
        .get();

    
  } else {
    print('User not found.');
  }
} catch (e) {
  print('Error retrieving posts: $e');
}