查询子集合的字段并在firestore android中获取父文档快照

Question

My requirement if a other user has saved my number on their mobile,i want to get his profile data.Now I am querying the mobile field,which is inside the contacts sub collection.when I make query I get document snapshot of the subcollection's document.But,I want to get Whole profile data of that user so,I need to get the parent snapshot.How can i achieve this or else do i have to change the structure of firestore? Thanks in advance

[

db.collectionGroup("contacts")
        .whereEqualTo("mobile",preference.getMobile()?.number)..get().addOnSuccessListener { snapShots ->
        val list = ArrayList<UserProfile>()
        for (s in snapShots) {
               //here i'm getting the contact data
           val contact = s.toObject(ModelMobile::class.java)
              //My need is getting userProfile Data
            /* val contact = s.toObject(UserProfile::class.java)
             list.add(contact)")*/
        }
    }

Answer 1

After the query on the contacts subcollection you will need to make another query for the parent document. It's not possible to get them both at the same time in a single query.

for (s in snapShots) {
    var parentDocRef = s.reference.parent.parent
    // Now you have to get() the parentDocRef to get its contents
}