Firestore + cloud functions: How to read from another document

Question

I\'m trying to write a Google cloud function that reads from another document. (Other document = not the document that triggered the cloud function.)

It\'s a bit of

Answer 1

Thank you, @frank-van-puffelen.

This is the working solution:

exports.updateLikeCount = functions.firestore
    .document('likes/{likeId}').onWrite((event) => {
        return admin.firestore()
            .collection('ruleSets')
            .doc(1234)
            .get()
            .then(doc => {
                console.log('Got rule: ' + doc.data().name);
            });
    });