19 lines
539 B
TypeScript
19 lines
539 B
TypeScript
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import * as functions from 'firebase-functions'
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import * as admin from 'firebase-admin'
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import { FieldValue } from 'firebase-admin/firestore'
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export const onUnfollowUser = functions.firestore
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.document('users/{userId}/follows/{followedUserId}')
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.onDelete(async (change, context) => {
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const { followedUserId } = context.params as {
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followedUserId: string
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}
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await firestore.doc(`users/${followedUserId}`).update({
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followerCountCached: FieldValue.increment(-1),
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})
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})
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const firestore = admin.firestore()
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