Created
October 25, 2017 13:43
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export const countReviews = functions.firestore.document("movies/{movieId}/reviews/{reviewId}").onCreate(async (event) => { | |
console.log(`Got a ${event.data.data().stars} star review`); | |
const review = event.data.data(); | |
admin.database().ref("movieRevies").child(event.params.movieId).transaction(movie => { | |
if (!movie) { | |
return movie; | |
} | |
console.log(`[${event.data.id}] Got a ${review.stars} star review from ${review.name} (now ${movie.numReviews} total reviews)`); | |
movie.numReviews += 1; | |
movie.totalReviewScore += review.stars; | |
movie.averageScore = (movie.totalReviewScore/movie.numReviews).toPrecision(3); | |
return movie; | |
}); | |
}); |
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