I have a firebase function that sets two values to zero. Is there a way to set the value of "lastDaily" to whatever the value of "click" is before setting click to 0?
exports.dailyReset = functions.pubsub.schedule("01 0 * * *")
.timeZone("Europe/London")
.onRun((context) => {
dbCon.once("value", function(snapshot) {
snapshot.forEach(function(child) {
child.ref.update({
lastDaily: 0,
click: 0,
});
});
});
});
The following should do the trick (untested):
exports.dailyReset = functions.pubsub.schedule("01 0 * * *")
.timeZone("Europe/London")
.onRun(async (context) => {
const snapshot = await dbCon.get();
const promises = [];
snapshot.forEach(child => {
const oldClickValue = child.val().lastDaily;
promises.push(child.ref.update({
lastDaily: oldClickValue,
click: 0,
}));
})
return Promise.all(promises);
});
Note that we use Promise.all() in order to return a Promise when all the asynchronous work is complete. For the same reason note that we use the get() method, which returns a Promise.
Another solution, instead of Promise.all(), would be to use the update() method as shown in this documentation section.