How to delete document automatically when it matches the time inside firebase for flutter?

Question

I am new to flutter. I am trying to delete a particular document when the datefrom field matches with current time. How and where shall I call the delete function? Note: It must delete even when the app is not in use

This is my current code:

getText() {
   if (dateTime == null) {
      return 'Select Datetime';
   } else {
      return DateFormat('MM/dd/yyyy HH:mm').format(dateTime!);
   }

deletetask() async {
     if (time == getText()){
        await FirebaseFirestore.instance
          .collection('mytasks')
          .doc('time')
          .delete()
          .then((value) => FirebaseStorage
          .instance
           .refFromURL('image')
           .delete());
      }

if you use for single user for a current user then you can call into the initState — MohammedAli, Mar 08 '22 at 06:54
means it will only delete when the app is opened right. I want it to delete atomically even without the app is open — Sriram, Mar 08 '22 at 06:56
do u mean in flutter? Because i am not sure where to call this cron function inside the app. Or can we do this from firebase console? — Sriram, Mar 08 '22 at 07:04
you can set the cron in firebase console or any other backend side — MohammedAli, Mar 08 '22 at 07:05
it's only available on Blaze pricing plan though... Not so sure about switching to uncapped billing while I'm still learning — Sriram, Mar 08 '22 at 07:12

score 2 · Answer 1 · answered Mar 08 '22 at 07:12

2

I believe what you're looking for are scheduled functions and they are documented here.

answered Mar 08 '22 at 07:12

Vandad Nahavandipoor

1,369
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15

it's only available on Blaze pricing plan though... Not so sure about switching to uncapped billing while I'm still learning – Sriram Mar 08 '22 at 07:13
Yes that's unfortunately the case; this is a paid-for functionality. You mentioned that you want this functionality to kick-in even when your app is not running; hence you either have to write a custom backend that integrates with your Firebase project or you have to pay for Firebase Blaze plan and have scheduled functions. – Vandad Nahavandipoor Mar 08 '22 at 07:14
Keep in mind that there's a quite generous free tier for Cloud Functions on the paid plan. So while you will need to have a billing account for the project, you won't have to pay for your Cloud Functions usage until you exceed that free quota. – Frank van Puffelen Mar 10 '22 at 22:21

How to delete document automatically when it matches the time inside firebase for flutter?

1 Answers1