How to query one field then order by another one in Firebase cloud Firestore?

Question

I\'m struggling to make a (not so) complex query in firebase cloud firestore.

I simply need to get all docs where the id field ==

Answer 1

Please check the doc. It says

However, if you have a filter with a range comparison (<, <=, >, >=), your first ordering must be on the same field

you can try this code

db.firestore().collection('comments')
    .where("postId",'==',idOfThePost)
    .orderBy('postId')
    .orderBy('date','asc').limit(10).get().then( snapshot => {
       .....
     })