How to extract data recursively from firestore? - flutter

Question

I have some documents in Firestore that contain references to other documents in other collections, I'm trying to extract one object (called order) that should look like:
{
"field1": "value1",
"field2": "value2",
...
"offer": {
"field1": "value1",
"field2": "value2",
...
"address": "string value"
}
}
I wrote this function:
Future<Map<String, dynamic>> getDetailsByDocumentReference(
DocumentReference ref) async {
final document = await ref.get();
final data = document.data() as Map<String, dynamic>;
final Map<String, dynamic> result = {};
data.forEach((field, value) async {
if (value is DocumentReference) {
result[field] = await getDetailsByDocumentReference(value);
} else {
result[field] = value;
}
});
return result;
}
The function is called this way:
Future<Map<String, dynamic>> getOrderDetailsById(String id) async {
DocumentReference<Map<String, dynamic>> docRef = _db.doc('orders/$id');
Map<String, dynamic> result = await getDetailsByDocumentReference(docRef);
return result;
}
The final result is only a map with one values that are not references
{
"field1": "value1",
"field2": "value2"
}
All async calls are made with await, what am I missing?

Answer 1

I don't see you referencing the collection anywhere. It seems this:
DocumentReference<Map<String, dynamic>> docRef = _db.doc('orders/$id');
Should instead be this:
DocumentReference<Map<String, dynamic>> docRef = _db.collection('orders').doc(id);
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