"how to update a value in firebase realtime database using cloud functions for firebase" Code Answer

you are trying to call update() on a deltasnapshot object. there is no such method on that type of object.

var eventsnapshot = event.data;
eventsnapshot.update({
    "isverified": true
});

event.data is a deltasnapshot. if you want to change the data at the location of the change represented by this object. use its ref property to get a hold of a reference object:

var ref = event.data.ref;
ref.update({
    "isverified": true
});

also, if you are reading or writing the database in a function, you should always return a promise that indicates when the change is complete:

return ref.update({
    "isverified": true
});

i would recommend taking frank's advice from the comments and study the existing sample code and documentation to better understand how cloud functions works.

By CursedMun on May 12 2022