Firestore query subcollections

Question

I thought I read that you can query subcollections with the new Firebase Firestore, but I don\'t see any examples. For example I have my Firestore setup in the following way

Answer 1

Query limitations

Cloud Firestore does not support the following types of queries:

1. Queries with range filters on different fields.

2. Single queries across multiple collections or subcollections. Each query runs against a single collection of documents. For more information about how your data structure affects your queries, see Choose a Data Structure.

3. Logical OR queries. In this case, you should create a separate query for each OR condition and merge the query results in your app.

4. Queries with a != clause. In this case, you should split the query into a greater-than query and a less-than query. For example, although the query clause where("age", "!=", "30") is not supported, you can get the same result set by combining two queries, one with the clause where("age", "<", "30") and one with the clause where("age", ">", 30).