firestore order by with where class does not work

orderby is not working ? All latest versions

does not work
let query = citiesCollection.where("state", "==", "CA").orderBy("population", "desc").limit(2); does not work
let query = citiesCollection.where("state", "==", "CA").orderBy("population").limit(1); does not work
let query = citiesCollection.where("state", "==", "CA").orderBy("state").limit(1);

Works let query = citiesCollection.where("state", "==", "CA").limit(2); Works let query = citiesCollection.limit(2);

Thanks, Narayan

[Ravi2908]

The problem is you need to create an index for your where and orderBy condition in the indexes column in your cloud firestore.

By creating indexes you will be able to fetch the record using where and orderBy

[narayananl23]

Thanks @EddyVerbruggen. Sharing my finding, so it can help others.

Copying the code from the demo ng helped. Since I am using non angular, I did not look at the sample at first and non angular do not have firestore sample.

I was using https://github.com/EddyVerbruggen/nativescript-plugin-firebase/blob/master/docs/FIRESTORE.md "Ordering and limiting results of collection.where() " from the firestore doc page.

When I used the angular, I found that I do not have index. When I posted the issue, I did not have error handling so I got lost.

CONSOLE LOG firestoreWhereOrderLimit failed, errorThe query requires an index. You can create it here: https://console.firebase.google.com/project/xxxxxx/database/firestore/indexes?create_index=xxxxxxxx