How to handle Firebase FCM registration token if you have thousands of users for sending push notifications?

Question

I want to send push notifications to thousands of mobile users. Do i need to store the registration tokens of all the users in my database ? If so how can i store it efficiently while detecting the token changes and all ? I want to send push notifications for all the users whether they are logged in or not.

I am extracting token like this

 await getToken(messaging, {
      vapidKey: 'vapid key',
    })
      .then((currentToken: any) => {
        if (currentToken) {
          console.log('toekn', currentToken)
          // Send the token to your server and update the UI if necessary
        } else {
          // Show permission request UI
          console.log(
            'No registration token available. Request permission to generate one.',
          )
        }
      })
      .catch(err => {
        console.log('An error occurred while retrieving token. ', err)
      })

Your map returns 'divs', they can't be filtered, they are not objects. Methods are executed one after the other when chained. — Vladimir Bogomolov, Jan 31 '20 at 09:49
I don't think div is the issue here. It works when id is mapped to key inside div. You can look at the code below. — Sudip Shrestha, Jan 31 '20 at 10:00

score 1 · Accepted Answer · answered Jan 31 '20 at 09:47

1

It looks like a react part and the rendere part does not contain an object for filtering.

Anyway it is a good idea to do the filtering first and then render the data set for output.

const
    weekLogs = this.props.weeklyLogs          
        .filter(weekLogs => weekLogs.id<10)  
        .map(weekLogs =>
            <div >
                <h3>{weekLogs.title}</h3>
            </div>
        )

answered Jan 31 '20 at 09:47

Nina Scholz

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then you got s/t to filter. – Nina Scholz Jan 31 '20 at 09:50
but anyway why filter at last? – Nina Scholz Jan 31 '20 at 09:51
Well its not mandatory. I just got the error that way and wanted to know why as i can't figure out myself. – Sudip Shrestha Jan 31 '20 at 09:57
you could take a console.log with the mapped array and have a look how it looks like. i assume it contains only the html part and no information from the original object. – Nina Scholz Jan 31 '20 at 09:59

How to handle Firebase FCM registration token if you have thousands of users for sending push notifications?

1 Answers1