I'm working with Firestore. The following code updates the matrix with a single element, that is, each time a user executes that function, said field is updated:
updateFavoritos(key) {
const user = firebase.auth().currentUser;
this.afs.doc('eventos/' + key).update({
favoritos: [ user.uid ],
});
}
This looks like this:
But how can I do to add instead of updating that matrix, is to say something like this:
Firestore have methods to handle arrays. Link to the docs
var washingtonRef = db.collection("cities").doc("DC");
// Atomically add a new region to the "regions" array field.
washingtonRef.update({
regions: firebase.firestore.FieldValue.arrayUnion("greater_virginia")
});
// Atomically remove a region from the "regions" array field.
washingtonRef.update({
regions: firebase.firestore.FieldValue.arrayRemove("east_coast")
});
