Question 119873 in Firebase Question posted in
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Firebase – How can I randomly add two users to a collection in firestore?

I am currently developing a chat application which allows users to chat with another random user by clicking a button. I have added the following package to my app: https://docs.flyer.chat/flutter/firebase/firebase-usage

My database looks as follows:

collection: rooms
document: chatroom1
subcollection: messages

collection: users
document: uid1 (which then includes fields like username, gender etc.)

So now I do not know how to get two random users from my users collection and create a chat room for them, in order to allow them to chat. How can I code the matching? And how do I create a chatroom for each random match? Is there a simple way?

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2

Answers


  1. 0

    First You need to create a list of users(uid or the doc_id) like this

    final list = ['user1', 'user2', 'user3', 'user4', 'user5'];

    then when you are trying to start chat so you can select the opponent by using this method

    // generates a new Random object

final _random = new Random();

// generate a random index based on the list length
// and use it to retrieve the element

var element = list[_random.nextInt(userList.length)];

    so it is just a reference for you for getting randow user.
    Hope you understand

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  2. 0

    There is no simple way to do this. You will need to query your users collection to get a list of all users. Then, you will need to randomly select two users from that list and create a chat room for them.

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