Prevent duplicate execution of Cloud Functions.
You should read this blog. firestore cloud functions onCreate/onDelete sometimes immediately triggered twice
npm install @star__hoshi/only-once --save
yarn add @star__hoshi/only-once
import * as OnlyOnce from '@star__hoshi/only-once'
OnlyOnce.initialize(admin.firestore())
export const updateUser = functions.firestore.document('user/{userId}').onCreate(async (change, context) => {
const wasTriggered = await OnlyOnce.wasTriggered(context.eventId)
if (wasTriggered) {
console.log(`EventID: ${context.eventId} was already triggered!`)
return undefined
}
// exec only once
return undefined
})