I return to this question.
I have the following structure. Each user has his own data.
---+ FB_ROOT_REFERENCE
|
+---+ Gy7FXRbRjDfAKWu7a95NgiGIZUk1 (Firebase User Id)
|
|
+---+ KlNlb71qtQUXIGA4cNa (random key, generated by Firebase)
| |
| +--- (data field ...)
|
|
+---+ KlNlcmfMTDjxQ0BwW1K
| |
| +--- (data field ...)
|
+---+ (...)
I've made some changes to the source code, but I do not know where to move next.
// Max number of lines
const MAX_RECORD_COUNT = 5;
const FB_ROOT_REFERENCE = '/locations';
// Removes siblings of the node that element that triggered the function if there are more than MAX_RECORD_COUNT.
// In this example we'll keep the max number of chat message history to MAX_RECORD_COUNT.
exports.truncate = functions.https.onRequest((req, res) => {
const cron_key = req.query.key;
// Exit if the keys don't match
if (!secureCompare(cron_key, functions.config().cron.key)) {
console.log('The cron_key provided in the request does not match the cron_key set in the environment. Check that', cron_key,
'matches the cron.key attribute in `firebase env:get`');
res.status(403).send('Security cron_key does not match. Make sure your cron_key URL query parameter matches the ' +
'cron.key environment variable.');
return;
}
// Next
// need iterate all the children in (FB_ROOT_REFERENCE + user id)
// and keep MAX_RECORD_COUNT data children
// most recent and delete all the rest (older ones)
// ...
// Here your code is required....
});
I would be very grateful if anyone could help me to write the source code. Thank you.
The code in this example will probably be useful "Limit number of child nodes"
