Connecting 2 random users from Firebase Realtime Database with Flutter

Question

I’m creating an app where I need to match two random users from my Firebase Database. My issue is that I'm not sure how to retrieve the list of users actively searching for a match. Here's how my database structure looks like:

Firebase Realtime Database

I'm looking to read the list of users searching for a match and compare match preferences to randomly match 2 users together. any suggestions on the syntax I should use to retrieve the list from Firebase Realtime Database to build the random matching logic?

mohamed.oussous · Accepted Answer · 2022-06-30 22:04:03Z

1

try this:

UserModel getRandomUser(UserModel currentUser, List<UserModel> activelySearching) {
  final matchedUsers = activelySearching.where(
    (otherUser) {
      return currentUser.uid != otherUser.uid &&
      currentUser.genderPreference == otherUser.userGender &&
      currentUser.userGender == otherUser.genderPreference &&

      currentUser.maxAgePreference >= otherUser.userAge &&
      currentUser.minAgePreference <= otherUser.userAge &&

      currentUser.userAge <= otherUser.maxAgePreference &&
      currentUser.userAge >= otherUser.minAgePreference &&
    }
  ).toList();

  // import 'dart:math'; to use Random
  final index = Random().nextInt(matchedUsers.length);
  return matchedUsers[index];
}

edited Jun 30, 2022 at 22:04

answered Jun 30, 2022 at 21:34

mohamed.oussous

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4 Comments

Jayleen45 Over a year ago

Thanks @mohamed.oussous for the tip there! How should I define UserModel? I have tried your suggestion and got an error that UserModel is not a defined class.

mohamed.oussous Over a year ago

of course you have to define it yourself by parsing the JSON data to a UserModel

mohamed.oussous Over a year ago

see medium.com/flutter-community/…

Jayleen45 Over a year ago

this video also helped on parsing the JSON data to a UserModel youtube.com/watch?v=sXBJZD0fBa4

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