Mapping firestore collection to json

问题

I have following structure in firebase data

Orders -> OrderID -> LocationHistory -> LocationHistoryID -> FieldsData

now i want to query by orderID and map all the results to json object i cant figure out how can i achieve this. Please see the screenshot for detail.pleas note that i am using spring-cloud-gcp-starter-data-firestore.

来源：https://stackoverflow.com/questions/60411568/mapping-firestore-collection-to-json