Deleting Child in raw-bus-location after 10 seconds

[Maphila]

I'm trying to delete child (Trip) in raw-bus location (Firebase) after 10 seconds. But getting errors in code, still learning node js. Any help is much appreciated.

exports.DeleteChild = class {
constructor(timeRef, rawBusLocationsRef, cutoff, oldItemsQuery ){
this.timeRef = timeRef;
this.rawBusLocationsRef = rawBusLocationsRef;
this.cutoff = cutoff;
this.oldItemsQuery = oldItemsQuery;

// Change the panel once every ten seconds
this.timeTimerId = setInterval(() => {
  this.deleteChild();
}, 10000);

}

deleteChild(){
this.cutoff = this.timeRef - 10000;
this.oldItemsQuery = this.rawBusLocationsRef.orderByChild('timestamp').endAt(this.cutoff);
return this.oldItemsQuery.once('value').then((snapshot) => {
// create a map with all children that need to be removed
const updates = {};
snapshot.forEach(child => {updates[child.key] = null;});
// execute all updates in one go and return the result to end the function
return this.rawBusLocationsRef.update(updates);
});
}};

and the error is:

/*

• Error: Query.endAt failed: first argument contains NaN in property 'raw-bus-location'
  at validateFirebaseData (/home/maphilak/server4r/node_modules/@firebase/database/dist/index.nod
  e.cjs.js:1443:15)
  at validateFirebaseDataArg (/home/maphilak/server4r/node_modules/@firebase/database/dist/index.
  node.cjs.js:1421:5)
  at Query.endAt (/home/maphilak/server4r/node_modules/@firebase/database/dist/index.node.cjs.js:
  4985:9)
  at exports.DeleteChild.deleteChild (/home/maphilak/server4r/delete_child.js:23:74)
  at Timeout.timeTimerId.setInterval [as _onTimeout] (/home/maphilak/server4r/delete_child.js:16:

12. at ontimeout (timers.js:475:11)
    at tryOnTimeout (timers.js:310:5)
    at Timer.listOnTimeout (timers.js:270:5)
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! transport-tracker-server@1.0.0 main: node main.js
    npm ERR! Exit status 1
    npm ERR!
    npm ERR! Failed at the transport-tracker-server@1.0.0 main script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
    npm ERR! A complete log of this run can be found in:
    npm ERR! /home/maphilak/.npm/_logs/2018-11-30T10_50_04_443Z-debug.log
    */

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Please comment here if it is still valid so that we can reprioritize. Thank you!

[Maphila]

Please reprioritize

…

On Fri, 4 Oct 2019 at 01:04, stale[bot] ***@***.***> wrote: This issue has been automatically marked as stale because it has not had recent activity. Please comment here if it is still valid so that we can reprioritize. Thank you! — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#58?email_source=notifications&email_token=AJGZA4BLSOHQLGUQDVJJSO3QMZ26BA5CNFSM4GHN2KS2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEAJ3HPY#issuecomment-538162111>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AJGZA4ADRD6TLFEUERW5IBTQMZ26BANCNFSM4GHN2KSQ> .

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